| 词条 | Calochilus pulchellus |
| 释义 |
| name = Pretty beard orchid | status_system = | status = | image = | image_caption = | taxon = Calochilus pulchellus | authority= D.L.Jones[1] | display_parents = 3 }} Calochilus pulchellus, commonly known as the pretty beard orchid, is a species of orchid endemic to the south coast of New South Wales. It has a single dark green leaf with a dark red base and up to five pale green to greenish yellow flowers with red striations and a labellum with a coppery red "beard". Fewer than thirty plants growing in three sites are known. DescriptionCalochilus pulchellus is a terrestrial, perennial, deciduous, herb with an underground tuber and a single dark green, linear to lance-shaped leaf {{convert|100-180|mm|in|sigfig=1|abbr=on}} long and {{convert|4-8|mm|in|sigfig=1|abbr=on}} wide with a dark red base. The leaf is fully developed at flowering time. Up to five pale green to greenish yellow flowers with red stripes are borne on a flowering stem {{convert|200-300|mm|in|sigfig=1|abbr=on}} tall. Individual flowers last for between two and four days. The dorsal sepal is broad elliptical, {{convert|13-16|mm|in|sigfig=1|abbr=on}} long and {{convert|8-9|mm|in|sigfig=1|abbr=on}} wide. The lateral sepals are a similar length but narrower and spread apart from each other. The petals are {{convert|8-9|mm|in|sigfig=2|abbr=on}} long, {{convert|5-6|mm|in|sigfig=2|abbr=on}} wide, asymmetrically egg-shaped with a small upturned tip. The labellum is flat, {{convert|28-30|mm|in|sigfig=2|abbr=on}} long, {{convert|6-7|mm|in|sigfig=2|abbr=on}} wide, with short red calli near its base. The central part of the labellum is covered with coppery red hairs up to {{convert|6|mm|in|sigfig=1|abbr=on}} long and there is a glandular tip which is {{convert|12-17|mm|in|sigfig=1|abbr=on}} long. The column has two blackish "eyes" without a ridge between them. Flowering occurs from October to November but each flower only last between two and four days.[2][3][4]Taxonomy and namingCalochilus pulchellus was first formally described in 2006 by David Jones from a specimen collected in the Morton National Park and the description was published in Australian Orchid Research.[5] The specific epithet (pulchellus) is the diminutive form of the Latin word pulcher meaning "pretty", hence "pretty little",[6] referring to the flowers of this species.[2]Distribution and habitatThe pretty beard orchid grows in low heath. It is only known from three sites in the Shoalhaven district.[2][4] ConservationThis orchid is listed as "endangered" under the New South Wales Biodiversity Conservation Act 2016. The main threat to the species is its small population size.[4] References1. ^{{WCSP | 346307 | Calochilus pulchellus}} {{Taxonbar|from=Q15494846}}2. ^1 2 {{cite book|last1=Jones|first1=David L.|title=A complete guide to native orchids of Australia including the island territories|date=2006|publisher=New Holland|location=Frenchs Forest, N.S.W.|isbn=1877069124|page =261}} 3. ^{{cite journal |last1=Jones |first1=David L. |title=New taxa of Australian Orchidaceae |journal=Australian Orchid Research |date=2006 |volume=5 |pages=68–69}} 4. ^1 2 {{cite web |title=Calochilus pulchellus - endangered species listing |url=http://www.environment.nsw.gov.au/determinations/calochiluspulchellusfd.htm |publisher=New South Wales Government Offfice of Environment and Heritage |accessdate=4 July 2018}} 5. ^{{cite web|title=Calochilus pulchellus|url= https://id.biodiversity.org.au/instance/apni/616338|publisher=APNI|accessdate=4 July 2018}} 6. ^{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page =409}} 4 : Calochilus|Flora of New South Wales|Endemic orchids of Australia|Plants described in 2006 |
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