Erigeron
Encyclopedia
Erigeron is a genus of about 390 species of flowering plant
s in the family Asteraceae
. The genus has a cosmopolitan distribution
with the highest species diversity in North America
, where 173 species occur.
The most widely used common name, fleabane
, is shared with related plants in several other genera; another common name is summer starwort. The common name is derived from the belief that the dried plants repelled flea
s, whilst the name erigeron is derived from the Greek
(eri = early; geron = old man), a reference to the appearance of the white hairs of the fruit soon after flowering.
The species are annuals
, biennials
or perennials
. They are well-branched plants with erect stems, characterized by their numerous white, lavender or pink ray flower
s and yellow disc flowers. Some members of this group have no ray flowers. The pappus
(= modified calyx, forming a crown) is shorter than in Aster, and consists of bristles. The ray florets are narrower than in Aster, but are clearly longer than the involucre (= whorled bract
s).
Many species are used as ornamental plant
s, with numerous named cultivar
s such as 'Wayne Roderick', 'Charity', 'Dunkelste Aller' and 'Foersters Liebling'.
Erigeron species are used as food plants by the larva
e of some Lepidoptera
species including Bucculatrix angustata
, Coleophora squamosella
(which feeds exclusively on E. acris), Schinia intermontana
, Schinia obscurata
(both of which also feed exclusively on Erigeron), Schinia sexata
(which feeds exclusively on E. glabellus) and Schinia villosa
.
Flowering plant
The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...
s in the family Asteraceae
Asteraceae
The Asteraceae or Compositae , is an exceedingly large and widespread family of vascular plants. The group has more than 22,750 currently accepted species, spread across 1620 genera and 12 subfamilies...
. The genus has a cosmopolitan distribution
Cosmopolitan distribution
In biogeography, a taxon is said to have a cosmopolitan distribution if its range extends across all or most of the world in appropriate habitats. For instance, the killer whale has a cosmopolitan distribution, extending over most of the world's oceans. Other examples include humans, the lichen...
with the highest species diversity in North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
, where 173 species occur.
The most widely used common name, fleabane
Fleabane
Fleabane is a common name for some flowering plants in the family Asteraceae.Most are in the subfamily Asteroideae:* Conyza * Erigeron * Inula...
, is shared with related plants in several other genera; another common name is summer starwort. The common name is derived from the belief that the dried plants repelled flea
Flea
Flea is the common name for insects of the order Siphonaptera which are wingless insects with mouthparts adapted for piercing skin and sucking blood...
s, whilst the name erigeron is derived from the Greek
Greek language
Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...
(eri = early; geron = old man), a reference to the appearance of the white hairs of the fruit soon after flowering.
The species are annuals
Annual plant
An annual plant is a plant that usually germinates, flowers, and dies in a year or season. True annuals will only live longer than a year if they are prevented from setting seed...
, biennials
Biennial plant
A biennial plant is a flowering plant that takes two years to complete its biological lifecycle. In the first year the plant grows leaves, stems, and roots , then it enters a period of dormancy over the colder months. Usually the stem remains very short and the leaves are low to the ground, forming...
or perennials
Perennial plant
A perennial plant or simply perennial is a plant that lives for more than two years. The term is often used to differentiate a plant from shorter lived annuals and biennials. The term is sometimes misused by commercial gardeners or horticulturalists to describe only herbaceous perennials...
. They are well-branched plants with erect stems, characterized by their numerous white, lavender or pink ray flower
Flower
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...
s and yellow disc flowers. Some members of this group have no ray flowers. The pappus
Pappus
Pappus may refer to:*Pappus , a type of flower structure*Pappus of Alexandria, Greek mathematician**Pappus's hexagon theorem, often just called 'Pappus's theorem', a theorem named for Pappus of Alexandria...
(= modified calyx, forming a crown) is shorter than in Aster, and consists of bristles. The ray florets are narrower than in Aster, but are clearly longer than the involucre (= whorled bract
Bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale. Bracts are often different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture...
s).
Many species are used as ornamental plant
Ornamental plant
Ornamental plants are plants that are grown for decorative purposes in gardens and landscape design projects, as house plants, for cut flowers and specimen display...
s, with numerous named cultivar
Cultivar
A cultivar'Cultivar has two meanings as explained under Formal definition. When used in reference to a taxon, the word does not apply to an individual plant but to all those plants sharing the unique characteristics that define the cultivar. is a plant or group of plants selected for desirable...
s such as 'Wayne Roderick', 'Charity', 'Dunkelste Aller' and 'Foersters Liebling'.
Erigeron species are used as food plants by the larva
Larva
A larva is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle...
e of some Lepidoptera
Lepidoptera
Lepidoptera is a large order of insects that includes moths and butterflies . It is one of the most widespread and widely recognizable insect orders in the world, encompassing moths and the three superfamilies of butterflies, skipper butterflies, and moth-butterflies...
species including Bucculatrix angustata
Bucculatricidae
Bucculatricidae or is a family of moths. This small family has representatives in all parts of the world. Some authors place the group as a subfamily of the family Lyonetiidae....
, Coleophora squamosella
Coleophora
Coleophora is a very large genus of moths of the family Coleophoridae. It contains some 1,350 described species. The genus is represented on all continents, but the majority are found in the Nearctic and Palaearctic regions...
(which feeds exclusively on E. acris), Schinia intermontana
Schinia
Schinia, commonly called Flower Moths, is a large genus of moths belonging to the family Noctuidae. The genus has a Holarctic distribution with the vast majority of species being found in North America, many with a very restricted range and larval food plant.-Species Information and Food Plants:...
, Schinia obscurata
Schinia
Schinia, commonly called Flower Moths, is a large genus of moths belonging to the family Noctuidae. The genus has a Holarctic distribution with the vast majority of species being found in North America, many with a very restricted range and larval food plant.-Species Information and Food Plants:...
(both of which also feed exclusively on Erigeron), Schinia sexata
Schinia
Schinia, commonly called Flower Moths, is a large genus of moths belonging to the family Noctuidae. The genus has a Holarctic distribution with the vast majority of species being found in North America, many with a very restricted range and larval food plant.-Species Information and Food Plants:...
(which feeds exclusively on E. glabellus) and Schinia villosa
Schinia
Schinia, commonly called Flower Moths, is a large genus of moths belonging to the family Noctuidae. The genus has a Holarctic distribution with the vast majority of species being found in North America, many with a very restricted range and larval food plant.-Species Information and Food Plants:...
.
Selected taxa
- Erigeron abajoensisErigeron abajoensisErigeron abajoensis is a species of Erigeron in the family Asteraceae, native to Utah in the southwest United States, where it grows on sunny, dry, rocky slopes generally at elevations of 2,270 to 3,400 m....
– Abajo fleabane - Erigeron accedens
- Erigeron acris – Blue Fleabane
- Erigeron acomanus – Bluewater Fleabane
- Erigeron acutatus
- Erigeron aequifoliusErigeron aequifoliusErigeron aequifolius is a rare species of flowering plant in the aster family known by the common names Hall's daisy and Hall's fleabane.-Distribution:...
– Hall's Fleabane, Hall's Daisy - Erigeron alaskanus
- Erigeron alcicornutus
- Erigeron algidusErigeron algidusErigeron algidus is a species of flowering plant in the daisy family known by the common name stalked fleabane.This wildflower is native to the High Sierra and nearby peaks in eastern California and western Nevada. It is a resident of alpine plant communities such as talus slopes...
– Stalked Fleabane - Erigeron aliceaeErigeron aliceaeErigeron aliceae is a species of flowering plant in the daisy family known by the common name Alice Eastwood's fleabane, or simply Alice's fleabane. It was named for the botanist Alice Eastwood....
– Alice Eastwood's Fleabane - Erigeron allocotus – Big Horn Fleabane
- Erigeron alpinus – Alpine Erigeron
- Erigeron anchana – Sierra Ancha Fleabane
- Erigeron angustatus
- Erigeron annuusErigeron annuusErigeron annuus is a plant in the daisy family, Asteraceae.-Description:Erigeron annuus is a herbaceous plant with alternate, simple leaves, and green, sparsely haired stems. The flowers are white with yellow centers, borne in spring through fall....
– Eastern Daisy Fleabane - Erigeron aphanactisErigeron aphanactisErigeron aphanactis is a species of flowering plant in the daisy family known by the common name rayless shaggy fleabane. This wildflower is native to the western United States from California to Colorado, where it grows in sage, scrub, and open woodland habitat. It is a short, clumping perennial...
– Rayless Shaggy Fleabane - Erigeron arenarioides – Sand Fleabane
- Erigeron argentatusErigeron argentatusErigeron argentatus is a species of flowering plant in the daisy family known by the common name silver fleabane.This wildflower is native to the western United States from California to Colorado, where it grows in woodlands and rocky mountainous habitat. It is a small perennial daisy attaining a...
– Silver Fleabane - Erigeron arisolius – Arid Throne Fleabane
- Erigeron arizonicus – Arizona Fleabane
- Erigeron asperugineus – Idaho Fleabane
- Erigeron atticus
- Erigeron aurantiacus – Orange Daisy
- Erigeron aureus – Alpine Yellow Fleabane
- Erigeron austiniaeErigeron austiniaeErigeron austiniae is a species of flowering plant in the aster family known by the common name sagebrush fleabane. It is sometimes considered a variety of Erigeron chrysopsidis. It is native to the western United States from northeastern California to southwestern Idaho, where it grows in the...
- Erigeron awapensis – Awapa Fleabane
- Erigeron barbarensis
- Erigeron barbellatus – Shining Fleabane
- Erigeron basalticus – Basalt Fleabane
- Erigeron bellidiastrum – Western Daisy Fleabane
- Erigeron bellioides
- Erigeron bigelovii – Bigelow's Fleabane
- Erigeron biolettiiErigeron biolettiiErigeron biolettii is a species of flowering plant in the aster family known by the common names streamside daisy and Bioletti's fleabane. It was named for University of California Professor of Viticulture and Enology Frederick Bioletti when he was an undergraduate. It is endemic to California,...
– Biolett's Erigeron - Erigeron bistiensis
- Erigeron blochmaniaeErigeron blochmaniaeErigeron blochmaniae is a species of flowering plant in the daisy family known by the common names Blochman's erigeron and Blochman's leafy daisy....
– Blochman's Erigeron - Erigeron bloomeriErigeron bloomeriErigeron bloomeri is a species of flowering plant in the daisy family known by the common name scabland fleabane.It is native to the slopes, meadows, and hillsides of the western United States. This wildflower is a short, small perennial daisy forming clumps over a taproot. It has mostly basal...
– Scabland Fleabane - Erigeron borealis – Alpine Fleabane
- Erigeron breviscapinus – Life Flower
- Erigeron breweriErigeron breweriErigeron breweri is a species of flowering plant in the daisy family known by the common name Brewer's fleabane.It is native to the western US states of California, Oregon, and Nevada, where it grows in many varied habitats, from mountains to grassland to desert. There are many varieties...
– Brewer's Fleabane - Erigeron caespitosus (syn. E. hyperboreus) – Tufted Fleabane
- Erigeron calvus
- Erigeron canus – Hoary Fleabane
- Erigeron cascadensis – Cascade Fleabane
- Erigeron caucasicus
- Erigeron cervinusErigeron cervinusErigeron cervinus is a species of flowering plant in the daisy family known by the common names Siskiyou fleabane and Del Norte daisy....
– Siskiyou Fleabane - Erigeron chrysopsidis – Dwarf Yellow Fleabane, Golden Daisy/Fleabane (yellow ray flowers).
- Erigeron cinereus
- Erigeron clokeyiErigeron clokeyiErigeron clokeyi is a species of flowering plant in the daisy family known by the common name Clokey's fleabane, or Clokey's daisy....
– Clokey's Fleabane - Erigeron colomexicanus – Running Fleabane
- Erigeron compactusErigeron compactusErigeron compactus is a species of flowering plant in the daisy family known by the common names cushion daisy and fernleaf fleabane....
– Fern-leaf Fleabane - Erigeron compositusErigeron compositusErigeron compositus, also known as Dwarf Mountain Fleabane, Cutleaf Daisy, and Trifid Mountain Fleabane, is a flowering plant in the genus Erigeron native to western North America to Greenland and eastern Canada....
– Cut-leaf Fleabane, Dwarf Mountain Fleabane (with or without ray flowers) - Erigeron concinnusErigeron concinnusErigeron concinnus is a perennial flowering plant in the family Asteraceae, native to the dry mountains of the Mojave Desert around Death Valley in southeast California, north and east to Idaho, Utah, Wyoming, Colorado and New Mexico; in its California range, it grows at altitudes of 1200-1800...
– Navajo Fleabane - Erigeron consimilis – Foothill Fleabane
- Erigeron corymbosus – Long-leaf Fleabane
- Erigeron coulteriErigeron coulteriErigeron coulteri is a species of flowering plant in the daisy family known by the common names large mountain fleabane and Coulter's daisy....
– Large Mountain Fleabane - Erigeron crenatus
- Erigeron cronquistii – Cronquist's Fleabane
- Erigeron cuneifolius – Wedge-leaf Fleabane
- Erigeron darrellianus – Darrell's Fleabane
- Erigeron decumbensErigeron decumbensErigeron decumbens is a species of flowering plant in the aster family known by the common name Willamette fleabane. It is native to Oregon and California in the United States....
– Willamette Fleabane - Erigeron delicatus
- Erigeron delphinifolius
- Erigeron disparipilus – White Cushion Fleabane
- Erigeron divergensErigeron divergensErigeron divergens is a flowering plant in the daisy family. Common names include spreading fleabane and branching fleabane. It bears small, attractive daisylike flowers with up to 150 ray flowers, giving the round flowerhead a frilly look. The flowers may be white or a light shade of purple. The...
– Spreading Fleabane - Erigeron eatoniiErigeron eatoniiErigeron eatonii is a species of flowering plant in the daisy family known by the common name Eaton's fleabane.This wildflower is native to much of the western United States where it grows in many habitats from grassland to scrub to woodland. It is a small perennial daisy reaching a maximum height...
– Eaton's Fleabane - Erigeron elatior – Tall Fleabane
- Erigeron elatus
- Erigeron elegantulusErigeron elegantulusErigeron elegantulus is a species of flowering plant in the daisy family known by the common names blue dwarf fleabane and volcanic daisy....
– Blue Dwarf Fleabane - Erigeron elmeri
- Erigeron engelmannii – Engelmann's Fleabane
- Erigeron evermannii – Evermann's Fleabane
- Erigeron eximius – Spruce-fir Fleabane
- Erigeron filifolius – Thread-leaf Fleabane
- Erigeron flabellifolius – Fan-leaf Fleabane.
- Erigeron flagellaris – Trailing Fleabane
- Erigeron flettii – Flett's Fleabane
- Erigeron foliosusErigeron foliosusErigeron foliosus is a species of flowering plant in the daisy family known by the common name leafy fleabane.This wildflower is native to western North America from Oregon to Baja California, where it can be found in many habitats. There are several varieties...
– Leafy Fleabane - Erigeron formosissimus – Beautiful Fleabane
- Erigeron fragilis
- Erigeron frigidus
- Erigeron frondeus
- Erigeron fruticetorum
- Erigeron fuertesii
- Erigeron furcatus
- Erigeron garrettii – Garrett's Fleabane
- Erigeron geiseri – Geiser's Fleabane
- Erigeron glabellus – Streamside Fleabane
- Erigeron glabratus
- Erigeron glaucusErigeron glaucusErigeron glaucus is a species of flowering plant in the daisy family known by the common name seaside fleabane, beach aster, or seaside daisy....
– Beach Aster, Beach Daisy, Seaside Daisy - Erigeron goodrichii – Uinta Mountain Fleabane
- Erigeron gracilis – Quill Fleabane
- Erigeron grandiflorus – Large-flower Fleabane
- Erigeron heliographisErigeron heliographisErigeron heliographis is a rare species of flowering plant in the aster family known by the common name Heliograph Peak fleabane. It is endemic to Arizona, where it occurs only in the Pinaleno Mountains in Graham County....
– Heliograph Peak Fleabane - Erigeron hessiiErigeron hessiiErigeron hessii is a rare species of flowering plant in the aster family known by the common name Hess' fleabane. It is endemic to New Mexico in the United States, where it is known from two locations in the Mogollon Mountains. It is found only in the Gila Wilderness.This rhizomatous perennial herb...
– Hess' Fleabane - Erigeron howellii – Howell's Fleabane
- Erigeron hultenii – Hulten's Fleabane
- Erigeron humilis – Arctic-alpine Fleabane
- Erigeron hungaricus – endemic to the Tatra MountainsTatra MountainsThe Tatra Mountains, Tatras or Tatra , are a mountain range which forms a natural border between Slovakia and Poland, and are the highest mountain range in the Carpathian Mountains...
- Erigeron hybridus
- Erigeron hyssopifolius – Hyssop-leaf Fleabane
- Erigeron inornatusErigeron inornatusErigeron inornatus is a species of flowering plant in the daisy family known by the common name California rayless fleabane.It is native to the west coast of the United States, where it can be found in several plant communities, from chaparral to mountain forests...
– California Rayless Fleabane - Erigeron jamaicensis – Jamaica Fleabane
- Erigeron jonesii – Jones' Fleabane
- Erigeron kachinensis – Kachina Fleabane
- Erigeron karvinskianusErigeron karvinskianusErigeron karvinskianus is a species of flowering plant in the daisy family known by the common name Latin American fleabane, though some know it as the Santa Barbara daisy....
– Latin American Fleabane - Erigeron kuscheiErigeron kuscheiErigeron kuschei is a rare species of flowering plant in the aster family known by the common name Chiricahua fleabane. It is endemic to Arizona in the United States, where it is known from two locations in the Chiricahua Mountains....
– Chiricahua Fleabane - Erigeron lackschewitzii
- Erigeron lanatusErigeron lanatusErigeron lanatus is a species of flowering plant in the aster family known by the common name woolly fleabane. It is native to western North America, where it occurs in the mountains straddling the border between British Columbia and Alberta and Montana...
– Woolly Fleabane - Erigeron lassenianusErigeron lassenianusErigeron lassenianus is a species of flowering plant in the daisy family known by the common name Mount Lassen fleabane.This wildflower is endemic to the high mountains of northern California, where it is a member of the coniferous forest understory. It grows erect or in low patches on the ground,...
– Mt. Lassen Fleabane - Erigeron latus – Broad Fleabane
- Erigeron leibergii – Leiberg's Fleabane
- Erigeron leiomerus – Rockslide Yellow Fleabane
- Erigeron lemmonii – Lemmon's Fleabane
- Erigeron linearisErigeron linearisErigeron linearis is a species of flowering plant in the daisy family known by the common name desert yellow fleabane.This wildflower is native to western North America from the high mountains of California to northwestern Canada. This is a small clumping perennial daisy reaching a maximum height...
– Desert Yellow Fleabane - Erigeron lobatus – Lobed Fleabane
- Erigeron lonchophyllusErigeron lonchophyllusErigeron lonchophyllus is a species of flowering plant in the aster family known by the common name shortray fleabane. It is native to North America including most all of Canada and the western and north-central United States. It occurs in many types of moist habitat and disturbed areas...
– Shortray Fleabane - Erigeron maguireiErigeron maguireiErigeron maguirei is a species of flowering plant in the aster family known by the common names Maguire daisy and Maguire's fleabane. It is endemic to Utah in the United States. It is a perennial herb growing up to tall. It grows from a taproot and a branching caudex. The stems are densely hairy...
– Maguire's Fleabane - Erigeron mairei – Atlas Mountains Fleabane
- Erigeron mancus – Depauperate Fleabane
- Erigeron maniopotamicusErigeron maniopotamicusErigeron maniopotamicus is a rare species of flowering plant in the aster family known by the common name Mad River fleabane. It is endemic to northern California, where it is known from six occurrences in three disjunct locations in Humboldt and Trinity Counties...
– Mad River Fleabane - Erigeron melanocephalus – Black-head Fleabane
- Erigeron mexiae – Mex's Fleabane
- Erigeron miserErigeron miserErigeron miser is a species of flowering plant in the daisy family known by the common name starved daisy. It is endemic to California, where it is known only from the northern High Sierra Nevada. It grows in rock crevices in coniferous forests and talus. This is a perennial herb producing several...
– Starved Fleabane - Erigeron miyabeanus – Japanese Fleabane
- Erigeron modestus – Plains Fleabane
- Erigeron muiriiErigeron muiriiErigeron muirii is a species of flowering plant in the daisy family that is endemic to northern Alaska and the northern Yukon Territory, growing in tundra, dry slopes, and rock outcrops...
– Muir's Fleabane - Erigeron multicepsErigeron multicepsErigeron multiceps is a species of flowering plant in the daisy family known by the common names Kern River daisy and Kern River fleabane. It is endemic to California, where it is known mostly from the Kern Plateau in the southern High Sierra Nevada of eastern Tulare County...
– Kern River Fleabane - Erigeron multiradiatus – Himalayan Fleabane
- Erigeron myosotis
- Erigeron nanus – Dwarf Fleabane
- Erigeron nauseosus – Marysvale Fleabane
- Erigeron neglectus
- Erigeron nematophyllus – Needle-leaf Fleabane
- Erigeron neomexicanus – New Mexico Fleabane
- Erigeron ochroleucus – Buff Fleabane
- Erigeron oharai
- Erigeron oreganus – Gorge Fleabane
- Erigeron oreophilus – Chaparral Fleabane
- Erigeron ovinus – Sheep Fleabane
- Erigeron oxyphyllus – Wand Fleabane
- Erigeron parishiiErigeron parishiiErigeron parishii is a species of flowering plant in the daisy family known by the common name Parish's fleabane.-Distribution:This wildflower is endemic to San Bernardino County, California, where it is a federally-listed threatened species losing habitat to development and the limestone mining...
– Parish's Fleabane - Erigeron peregrinusErigeron peregrinusErigeron peregrinus is a species of flowering plant in the daisy family known by the common names subalpine fleabane and wandering daisy....
– Wandering Fleabane, Subalpine Fleabane, Foreign Fleabane - Erigeron petrophilusErigeron petrophilusErigeron petrophilus is a species of flowering plant in the daisy family known by the common names rockloving erigeron. It is native to the mountain ranges of northern California and far southern Oregon, where it grows in forest and woodland, often, as its name suggests, in rocky habitat. It is...
– Cliff Fleabane, Rock daisy (no ray flowers) - Erigeron philadelphicusErigeron philadelphicusErigeron philadelphicus is a plant in the daisy family, Asteraceae. Also known as Skevish or Philadelphia Daisy.- Description :...
– Philadelphia Fleabane/Daisy - Erigeron pinnatisectus – Feather-leaf Fleabane
- Erigeron piperianus – Piper's Fleabane
- Erigeron piscaticusErigeron piscaticusErigeron piscaticus is a rare species of flowering plant in the aster family known by the common name Fish Creek fleabane. It is endemic to Arizona in the United States, where it is known from three locations in Maricopa and Graham Counties....
– Fish Creek Fleabane - Erigeron poliospermus – Purple Cushion Fleabane
- Erigeron pringlei – Pringle's Fleabane
- Erigeron procumbens – Corpus Christi Fleabane
- Erigeron proselyticus – Professor's Fleabane
- Erigeron pubescens – Hairy Fleabane
- Erigeron pulchellus – Robin's Plantain
- Erigeron pulcherrimus – Basin Fleabane
- Erigeron pumilus – Shaggy Fleabane
- Erigeron purpuratus – Purple Fleabane
- Erigeron pygmaeusErigeron pygmaeusErigeron pygmaeus is a species of flowering plant in the daisy family known by the common name pygmy fleabane, or pygmy daisy....
– Pygmy Fleabane - Erigeron quercifolius – Oak-leaf Fleabane
- Erigeron radicatus – Tap-root Fleabane
- Erigeron reductusErigeron reductusErigeron reductus is a species of flowering plant in the daisy family known by the common name lesser California rayless fleabane. It is endemic to California, where it grows in rocky habitat in several mountain ranges in the northern part of the state...
- Erigeron religiosus – Clear Creek Fleabane
- Erigeron rhizomatusErigeron rhizomatusErigeron rhizomatus is a rare species of flowering plant in the aster family known by the common names Zuni fleabane and rhizome fleabane. It is native to western New Mexico and eastern Arizona in the United States...
– Zuni Fleabane - Erigeron roylei – Royle's Fleabane
- Erigeron rybius – Royal Fleabane
- Erigeron rydbergii – Rydberg's Fleabane
- Erigeron salishii – Star Peak Fleabane
- Erigeron salmonensis – Salmon River Fleabane
- Erigeron sanctarumErigeron sanctarumErigeron sanctarum is an uncommon species of flowering plant in the daisy family known by the common names saints fleabane and saints daisy. It is endemic to California, where it is known from San Luis Obispo and Santa Barbara Counties and two of the Channel Islands. It grows in coastal and inland...
– Saints Fleabane - Erigeron saxatilis – Rock Fleabane
- Erigeron sceptrifer – Scepter-bearing Fleabane
- Erigeron scopulinus – Winn Falls Fleabane
- Erigeron serpentinusErigeron serpentinusErigeron serpentinus is a rare species of flowering plant in the daisy family known by the common names serpentine fleabane and serpentine daisy. It is endemic to Sonoma County, California, where it is known from three occurrences in and around The Cedars. There are an estimated 1100 individuals in...
- Erigeron simplex – One-stem Fleabane
- Erigeron sionis – Zion Fleabane
- Erigeron sivinskii
- Erigeron socorrensis
- Erigeron speciosus – Aspen Fleabane
- Erigeron strigosusErigeron strigosusErigeron strigosus is a species of flowering plant in the daisy family known by the common name plains fleabane.It is native to eastern North America, and it is present in western North America as a somewhat weedy naturalized species. This is an annual or biennial daisy reaching heights of anywhere...
– Prairie Fleabane - Erigeron subglaber – Hairless Fleabane
- Erigeron subtrinervis – Three-nerve Fleabane
- Erigeron supplexErigeron supplexErigeron supplex is a rare species of flowering plant in the daisy family known by the common name supple daisy. It is endemic to the coastline of northern California, where it probably remains only in Sonoma and Marin Counties. It grows in the scrub of coastal bluffs and grasslands. This is a...
– Supple Fleabane - Erigeron tenellus – Rio Grande Fleabane
- Erigeron tenerErigeron tenerErigeron tener is a species of flowering plant in the daisy family known by the common name slender fleabane. It is native to the western United States, where it grows in mountainous and rocky plateau habitat. This is a small, clumping perennial herb producing a gray-green stem up to about 15...
– Slender Fleabane - Erigeron tenuis – Slender-leaf Fleabane
- Erigeron thunbergii – Thunberg's Fleabane
- Erigeron tweedyi – Tweedy's Fleabane
- Erigeron uintahensis – Uinta Fleabane
- Erigeron uncialis – Lone Fleabane
- Erigeron uniflorus – One-flowered Fleabane
- Erigeron untermannii – Indian Canyon Fleabane
- Erigeron ursinus – Bear River Fleabane
- Erigeron utahensisErigeron utahensisErigeron utahensis is a species of flowering plant in the daisy family known by the common name Utah fleabane.It is native to the western United States from California to Colorado. This is a perennial daisy growing from a stout taproot and caudex to anywhere from 10 to 50 centimeters in height. Its...
– Utah Fleabane - Erigeron vagusErigeron vagusErigeron vagus is a species of flowering plant in the daisy family known by the common names rambling fleabane and loose daisy....
– Rambling Fleabane - Erigeron velutipes
- Erigeron vernus – Early White-top Fleabane
- Erigeron versicolor – Sonora Fleabane
- Erigeron vetensis – Early Blue-top Fleabane
- Erigeron viscosum
- Erigeron vreelandii
- Erigeron watsonii – Watson's Fleabane
- Erigeron wilkenii – Wilken's Fleabane
- Erigeron yukonensis – Yukon Fleabane
- Erigeron zothecinus – Lake Powell Fleabane