''Hemipilia gracilis'', commonly known as delicate amitostigma, is a species of
plant in the family
Orchidaceae. It is widespread across much of eastern Asia where it has been reported from Japan, Korea, Taiwan, and China (
Anhui,
Fujian,
Guangxi
Guangxi (; ; Chinese postal romanization, alternately romanized as Kwanghsi; ; za, Gvangjsih, italics=yes), officially the Guangxi Zhuang Autonomous Region (GZAR), is an Autonomous regions of China, autonomous region of the People's Republic ...
,
Guizhou,
Hebei,
Henan,
Hubei,
Hunan,
Jiangsu,
Liaoning
Liaoning () is a coastal province in Northeast China that is the smallest, southernmost, and most populous province in the region. With its capital at Shenyang, it is located on the northern shore of the Yellow Sea, and is the northernmost ...
,
Shaanxi,
Shandong
Shandong ( , ; ; alternately romanized as Shantung) is a coastal province of the People's Republic of China and is part of the East China region.
Shandong has played a major role in Chinese history since the beginning of Chinese civilizati ...
,
Sichuan, and
Zhejiang).
/ref>
Taxonomy
The species was first described by Carl Ludwig Blume in 1856, as ''Mitostigma gracile''. It has been placed in various genera, including '' Gymnadenia'', '' Orchis'' and ''Amitostigma''.[ A ]molecular phylogenetic
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...
study in 2014, in which it was included as ''Amitostigma gracile'', found that species of ''Amitostigma'', ''Neottianthe'' and ''Ponerorchis'' were mixed together in a single clade
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...
, making none of the three genera monophyletic
In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic gro ...
as then circumscribed
In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius.
Not every polyg ...
. ''Amitostigma'' and ''Neottianthe'' were subsumed into ''Ponerorchis'', with this species then becoming ''Ponerorchis gracilis''.[ The genus ''Ponerorchis'' has since been synonymized with the genus ''Hemipilia'', resulting in the present name.
]
References
External links
IOSOPE Orchid Species photos
Garden Talking, Amitostigma gracile
Nature Library, 无柱兰 （''Amitostigma gracile''）
gracilis
Orchids of Japan
Orchids of Korea
Orchids of China
Orchids of Taiwan
Plants described in 1836
{{Orchidoideae-stub