Penstemon pinorum
Encyclopedia
Penstemon pinorum is a rare species of flowering plant in the plantain family
known by the common name pinyon penstemon. It is endemic to Utah
in the United States, where it is known only from an area along the border between Washington
and Iron Counties
.
This plant was first described in 1985. It grows up to 21 centimeters tall, the stems arising from a woody caudex
and fleshy root system. The lance-shaped leaves are up to 8 centimeters long and have wavy-toothed edges. The herbage is hairy. The inflorescence
is a thyrse
of flowers each about a centimeter long or slightly larger. The flower has a calyx of pointed sepal
s and a purple-blue bearded corolla. Protruding from the corolla is a staminode
covered in light orange hairs. Blooming occurs in May and June.
This plant grows in pinyon-juniper woodland
, in washes
with soil rich in red basalt
and hematite
.
There are only three locations where this plant may be found. It grows on an area of land totalling about 485 hectare
s. Within this small range it can be locally abundant, with an estimated total of 50,000 individuals. The plant's range is located southwest of Newcastle, Utah
, and east of Old Iron Town
.
This plant is threatened by firewood
harvesting, which has caused habitat destruction
in the area. It may also be threatened by mining
operations.
Plantaginaceae
Plantaginaceae Juss. or plantain family, are a family of flowering plants in the order Lamiales. The type genus is Plantago L..In older classifications it used to be the only family of the order Plantaginales, but numerous phylogenetic studies, summarized by the Angiosperm Phylogeny Group, have...
known by the common name pinyon penstemon. It is endemic to Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...
in the United States, where it is known only from an area along the border between Washington
Washington County, Utah
As of the census of 2000, there were 90,354 people, 29,939 households, and 23,442 families residing in the county. The population density was 37 people per square mile . There were 36,478 housing units at an average density of 15 per square mile...
and Iron Counties
Iron County, Utah
As of the census of 2000, there were 33,779 people, 10,627 households, and 8,076 families residing in the county. The population density was 10 people per square mile . There were 13,618 housing units at an average density of 4 per square mile...
.
This plant was first described in 1985. It grows up to 21 centimeters tall, the stems arising from a woody caudex
Caudex
A caudex is a form of stem morphology appearing as a thickened, short, perennial stem that is either underground or near ground level . It may be swollen for the purpose of water storage, especially in xerophytes...
and fleshy root system. The lance-shaped leaves are up to 8 centimeters long and have wavy-toothed edges. The herbage is hairy. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
is a thyrse
Panicle
A panicle is a compound raceme, a loose, much-branched indeterminate inflorescence with pedicellate flowers attached along the secondary branches; in other words, a branched cluster of flowers in which the branches are racemes....
of flowers each about a centimeter long or slightly larger. The flower has a calyx of pointed sepal
Sepal
A sepal is a part of the flower of angiosperms . Collectively the sepals form the calyx, which is the outermost whorl of parts that form a flower. Usually green, sepals have the typical function of protecting the petals when the flower is in bud...
s and a purple-blue bearded corolla. Protruding from the corolla is a staminode
Staminode
In botany, a staminode is an often rudimentary, sterile or abortive stamen. This means that it does not produce pollen. Staminodes are frequently inconspicuous and stamen-like, usually occurring at the inner whorl of the flower, but are also sometimes long enough to protrude from the...
covered in light orange hairs. Blooming occurs in May and June.
This plant grows in pinyon-juniper woodland
Pinyon-juniper woodland
A Pinyon-juniper woodland is a forest type characteristic of many parts the Western United States, often in higher elevations of desert ecoregions.-Locations:...
, in washes
Arroyo (creek)
An arroyo , a Spanish word translated as brook, and also called a wash is usually a dry creek or stream bed—gulch that temporarily or seasonally fills and flows after sufficient rain. Wadi is a similar term in Africa. In Spain, a rambla has a similar meaning to arroyo.-Types and processes:Arroyos...
with soil rich in red basalt
Basalt
Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...
and hematite
Hematite
Hematite, also spelled as haematite, is the mineral form of iron oxide , one of several iron oxides. Hematite crystallizes in the rhombohedral system, and it has the same crystal structure as ilmenite and corundum...
.
There are only three locations where this plant may be found. It grows on an area of land totalling about 485 hectare
Hectare
The hectare is a metric unit of area defined as 10,000 square metres , and primarily used in the measurement of land. In 1795, when the metric system was introduced, the are was defined as being 100 square metres and the hectare was thus 100 ares or 1/100 km2...
s. Within this small range it can be locally abundant, with an estimated total of 50,000 individuals. The plant's range is located southwest of Newcastle, Utah
Newcastle, Utah
Newcastle is a census-designated place in southwestern Iron County, Utah, United States. It lies along State Route 56 southwest of the city of Parowan, the county seat of Iron County. Its elevation is 5,312 feet . Although Newcastle is unincorporated, it has a post office, with the ZIP code...
, and east of Old Iron Town
Old Iron Town, Utah
Old Iron Town, originally Iron City, is a ghost town in Iron County, in the U.S. state of Utah. It is located in Dixie National Forest, about from Cedar City. The settlement was founded in 1868 as a second attempt to mine iron from Iron Mountain after a disappointing yield from Cedar City...
.
This plant is threatened by firewood
Firewood
Firewood is any wood-like material that is gathered and used for fuel. Generally, firewood is not highly processed and is in some sort of recognizable log or branch form....
harvesting, which has caused habitat destruction
Habitat destruction
Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction by human activity mainly for the purpose of...
in the area. It may also be threatened by mining
Mining
Mining is the extraction of valuable minerals or other geological materials from the earth, from an ore body, vein or seam. The term also includes the removal of soil. Materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock...
operations.