Английская Википедия:Diuris brevifolia

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Diuris brevifolia, commonly known as the short-leaved donkey orchid, is a species of orchid which is endemic to South Australia. It has a few narrow, twisted leaves and a flowering stem with up to five bright yellow flowers with brown markings and relatively large, spreading lobes on the labellum. This is a relatively late-flowering species of donkey orchid.

Description

Diuris brevifolia is a tuberous, perennial herb with between four and eight, often twisted leaves which are Шаблон:Convert long and Шаблон:Convert wide. Up to five bright yellow flowers Шаблон:Convert wide are borne on a flowering stem Шаблон:Convert tall. There are two brown spots on the base of the dorsal sepal and the labellum callus is outlined in brown. The dorsal sepal is erect or bent upwards, Шаблон:Convert long, Шаблон:Convert wide. The lateral sepals are greenish, linear to lance-shaped, Шаблон:Convert long, Шаблон:Convert wide and turn downwards, more or less parallel to each other. The petals are erect or curved backwards, have a dark brown stalk Шаблон:Convert long with a blade Шаблон:Convert long and Шаблон:Convert wide. The labellum is egg-shaped, Шаблон:Convert long and Шаблон:Convert wide with side lobes Шаблон:Convert long and about Шаблон:Convert wide. There are two parallel ridge-like calli about Шаблон:Convert long near the mid-line of the labellum. Flowering occurs from October to December.

Taxonomy and naming

Diuris brevifolia was first formally described in 1922 by Richard Sanders Rogers who published his description in Transactions and Proceedings of the Royal Society of South Australia. The specific epithet (brevifolia) is derived from the Latin words brevis meaning "short"Шаблон:Rp and folia meaning "leaves".Шаблон:Rp

Distribution and habitat

The short-leaved donkey orchid grows in a variety of habitats including heath, forest and woodland but is most common around the edges of swamps and river flats. It only occurs to the south of Adelaide and on Kangaroo Island.

Conservation

There has been a large decline in the distribution and abundance of this donkey orchid in recent years and is listed as "endangered" in South Australia. The main threats to the species are incompatible land use and infrequent fire.