Prasophyllum robustum
species of plant
Prasophyllum robustum, commonly known as the robust leek orchid, is a species of orchid endemic to Tasmania. It has a single tubular, green leaf and up to thirty greenish-brown flowers with a white labellum. It is only known from a single population of about fifty plants, its numbers having been reduced by land clearing.
Description
Prasophyllum robustum is a terrestrial, perennial, deciduous, herb with an underground tuber and a single tube-shaped leaf which is 300–850 mm (10–30 in) long and 5–6 mm (0.20–0.24 in) wide near its dark red to purple base. Between fifteen and thirty greenish-brown to brownish flowers are loosely arranged along a flowering spike which is 150–250 mm (6–10 in) long reaching to a height of 400–1,100 mm (20–40 in). The flowers are 15–20 mm (0.6–0.8 in) long and wide and as with other leek orchids, are inverted so that the labellum is above the column rather than below it. The dorsal sepal is lance-shaped to egg-shaped, about 9.5–11 mm (0.37–0.43 in) long, about 5 mm (0.2 in) wide and has about four dark brown striations. The lateral sepals are linear to lance-shaped, 10–12 mm (0.4–0.5 in) long, about 2.5 mm (0.1 in) wide and spread widely apart from each other. The petals are linear, 10–11 mm (0.39–0.43 in) long, about 2.5 mm (0.1 in) wide and whitish with a brown line along the centre. The labellum is white, egg-shaped to lance-shaped, 11–13 mm (0.4–0.5 in) long, about 6 mm (0.2 in) wide and turns sharply back on itself near its middle.
This brief starts where responsible research should: with the source description of “Prasophyllum robustum” as species of plant. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the science & nature register because the source frames it as species of plant. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Nov 7, 2022. The linked authority identifier is Q15489123. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Prasophyllum robustum” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.