Boryaceae
Encyclopedia
Boryaceae is a family
of arborescent
, or tree forming, highly drought-tolerant
flowering plants native to Australia
, placed in the order
Asparagales
of the monocots. The tree
habit of these plants and their former placement in the Lily family
led to a general common name of lily trees.
Until recently, this family was not recognized by many taxonomists
, with most systems putting the two genera, Borya and Alania, in the Anthericaceae or the Liliaceae
. The 2009 APG III system
(unchanged from the 1998 and 2003 versions) does recognize this family and places it in the order Asparagales
, in the clade monocots, based on molecular phylogenetic
evidence that shows the two genera to form a clade
. The family then includes these two genera
, totalling a dozen species
in Australia
.
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
of arborescent
Arborescent
Arborescent is a term used by the French thinkers Deleuze and Guattari to characterize thinking marked by insistence on totalizing principles, binarism and dualism...
, or tree forming, highly drought-tolerant
Xerophyte
A xerophyte or xerophytic organism is a plant which has adapted to survive in an environment that lacks water, such as a desert. Xerophytic plants may have adapted shapes and forms or internal functions that reduce their water loss or store water during long periods of dryness...
flowering plants native to Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
, placed in the order
Order (biology)
In scientific classification used in biology, the order is# a taxonomic rank used in the classification of organisms. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family...
Asparagales
Asparagales
Asparagales is the name of an order of plants, used in modern classification systems such as the APG III system . The order takes its name from the family Asparagaceae and is placed in the monocots. The order has only recently been recognized in classification systems...
of the monocots. The tree
Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
habit of these plants and their former placement in the Lily family
Liliaceae
The Liliaceae, or the lily family, is a family of monocotyledons in the order Liliales. Plants in this family have linear leaves, mostly with parallel veins but with several having net venation , and flower arranged in threes. Several have bulbs, while others have rhizomes...
led to a general common name of lily trees.
Until recently, this family was not recognized by many taxonomists
Taxonomy
Taxonomy is the science of identifying and naming species, and arranging them into a classification. The field of taxonomy, sometimes referred to as "biological taxonomy", revolves around the description and use of taxonomic units, known as taxa...
, with most systems putting the two genera, Borya and Alania, in the Anthericaceae or the Liliaceae
Liliaceae
The Liliaceae, or the lily family, is a family of monocotyledons in the order Liliales. Plants in this family have linear leaves, mostly with parallel veins but with several having net venation , and flower arranged in threes. Several have bulbs, while others have rhizomes...
. The 2009 APG III system
APG III system
The APG III system of flowering plant classification is the third version of a modern, mostly molecular-based, system of plant taxonomy...
(unchanged from the 1998 and 2003 versions) does recognize this family and places it in the order Asparagales
Asparagales
Asparagales is the name of an order of plants, used in modern classification systems such as the APG III system . The order takes its name from the family Asparagaceae and is placed in the monocots. The order has only recently been recognized in classification systems...
, in the clade monocots, based on molecular phylogenetic
Molecular phylogeny
Molecular phylogenetics is the analysis of hereditary molecular differences, mainly in DNA sequences, to gain information on an organism's evolutionary relationships. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree...
evidence that shows the two genera to form a clade
Clade
A clade is a group consisting of a species and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central to biological...
. The family then includes these two genera
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
, totalling a dozen species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
in Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
.