Английская Википедия:Daviesia debilior

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Файл:Daviesia debilior subsp. sinuans.jpg
Subspecies sinuans near Wongan Hills

Daviesia debilior is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a shrub with low-lying stems and many erect branchlets, scattered linear to scale-like phyllodes, and yellow, purplish, orange-pink and dark purplish flowers.

Description

Daviesia debilior is a shrub with low-lying stems and many erect branchlets, and that typically grows up to Шаблон:Cvt high and Шаблон:Cvt wide. Its leaves are reduced to scattered, linear to scale-like phyllodes similar to the branchlets, up to Шаблон:Cvt long and Шаблон:Cvt wide. Juvenile phyllodes are narrowly spatula-shaped, Шаблон:Cvt long and Шаблон:Cvt wide. The flowers are arranged in groups of two to eight in leaf axils on a peduncle Шаблон:Cvt long, each flower on a thread-like pedicel Шаблон:Cvt long with egg-shaped bracts about Шаблон:Cvt long at the base. The sepals are Шаблон:Cvt long and joined at the base, forming a bell-shaped base, the two upper lobes joined for most of their length and the lower three triangular. The standard is broadly elliptic, Шаблон:Cvt long, Шаблон:Cvt wide and yellow with a purplish or red centre, the wings Шаблон:Cvt long and pinkish-orange, and the keel Шаблон:Cvt long and dark purplish-red. Flowering occurs from May to July and the fruit is a flattened, triangular pod Шаблон:Cvt long.[1][2][3][4]

Taxonomy and naming

Daviesia debilior was first formally described in 1982 by Michael Crisp in the journal Nuytsia from specimens collected by Charles Chapman near Eneabba in 1977.[4][5] The specific epithet (debilior) means "weaker" or "more feeble", in comparison to the closely related Daviesia hakeoides.[4]

In the same journal, Crisp described two subspecies and the names are accepted by the Australian Plant Census:

  • Daviesia debilior Crisp subsp. debilior[6] has gently upcurved branchlets and phyllodes, at least on the lower parts of the branchlets;[1][4]
  • Daviesia debilior subsp. sinuans Crisp[7] has weakly upcurved, sinuous branchlets and all phyllodes reduced to minute scales.[2][4]

Distribution and habitat

This species of pea grows in heath between Eneabba, Darlington and Wongan Hills in the Avon Wheatbelt, Geraldton Sandplains and Jarrah Forest biogeographic regions of south-western Western Australia.[3][8] Subspecies sinuans has a more restricted distribution further inland than the autonym.[1][2][3]

Conservation status

Subspecies debilior is classified as "Priority Two" by the Western Australian Government Department of Biodiversity, Conservation and Attractions,[1] meaning that it is poorly known and from only one or a few locations, and subspecies sinuans "Priority Three" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[2] meaning that it is poorly known and known from only a few locations but is not under imminent threat.[9]

References

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