''Swainsona incei'' is a species of flowering plant in the family

Fabaceae Fabaceae () or Leguminosae,International Code of Nomen ...

and is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to inland Western Australia. It is an erect or ascending annual, sometimes

perennial In horticulture, the term perennial ('' per-'' + '' -ennial'', "through the year") is used to differentiate a plant from shorter-lived annuals and biennials. It has thus been defined as a plant that lives more than 2 years. The term is also ...

herb Herbs are a widely distributed and widespread group of plants, excluding vegetables, with savory or aromatic properties that are used for flavoring and garnishing food, for medicinal purposes, or for fragrances. Culinary use typically distingu ...

with

imparipinnate Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, and in ...

leaves with 5 to 9 lance-shaped to elliptic leaflets, and

raceme A raceme () or racemoid is an unbranched, indeterminate growth, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are ...

s of 2 to 30 purple flowers.

Description

''Swainsona incei'' is an erect or ascending annual, sometimes perennial herb, that typically grows to a height of about , sometimes to and has many strongly ridged stems wide. Its leaves are imparipinnate, mostly long on an elongated petiole with 5 to 9 lance-shaped to elliptic leaflets mostly long and wide. There are

stipule In botany, a stipule is an outgrowth typically borne on both sides (sometimes on just one side) of the base of a leafstalk (the petiole (botany), petiole). They are primarily found among dicots and rare among monocots. Stipules are considered part ...

s long at the base of the petiole. The flowers are arranged in racemes long with 2 to 30 flowers on a peduncle wide, each flower long on a softly hairy

pedicel Pedicle or pedicel may refer to: Human anatomy *Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures ...

long. The

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 Etymology The term ''sepalum'' ...

s are joined at the base, forming a tube about long, the sepal lobes equal to or longer than the tube. The petals are purple, the

standard Standard may refer to: Symbols * Colours, standards and guidons, kinds of military signs * Standard (emblem), a type of a large symbol or emblem used for identification Norms, conventions or requirements * Standard (metrology), an object ...

petal long and wide, the wings long, and the

keel The keel is the bottom-most longitudinal structural element of a watercraft, important for stability. On some sailboats, it may have a fluid dynamics, hydrodynamic and counterbalancing purpose as well. The keel laying, laying of the keel is often ...

long and deep. Flowering occurs from July to September, and the fruit is a narrowly oval pod about long and wide with a short stalk and the remains of the

style Style, or styles may refer to: Film and television * ''Style'' (2001 film), a Hindi film starring Sharman Joshi, Riya Sen, Sahil Khan and Shilpi Mudgal * ''Style'' (2002 film), a Tamil drama film * ''Style'' (2004 film), a Burmese film * '' ...

about long.

Taxonomy

''Swainsona incei'' was first formally described in 1910 by William Robert Price in the '' Bulletin of Miscellaneous Information'' from specimens collected by W.H. Ince, probably on " Mt Sir Samuel, near Lawlers". The

specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...

(''incei'') honours Walter Holinshed Ince and/or his sister Miss M.B. Ince.

Distribution and habitat

This species of Swainsona grows on well-drained sandy or gravelly soil in the Carnarvon, Coolgardie,

Gascoyne The Gascoyne region is one of the nine regions of Western Australia. It is located in the northwest of Western Australia, and consists of the local government areas of Carnarvon, Exmouth, Shark Bay and Upper Gascoyne. The Gascoyne has about of ...

, Murchison and

Pilbara The Pilbara () is a large, dry, sparsely populated regions of Western Australia, region in the north of Western Australia. It is known for its Indigenous Australians, Aboriginal people; wealth disparity; its ancient landscapes; the prevailing r ...

bioregions of inland Western Australia.

References

{{Taxonbar, from=Q15481939 ince Fabales of Australia Flora of Western Australia Plants described in 1910