Tsaiorchis
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''Tsaiorchis'' is a
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...
s in the family
Orchidaceae Orchids are plants that belong to the family (biology), family Orchidaceae (), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Orchids are cosmopolitan distribution, cosmopolitan plants that ...
.


Taxonomy

''Tsaiorchis'' is placed in the orchid subfamily
Orchidoideae The Orchidoideae, or the orchidoid orchids, are a subfamily of the orchid family (Orchidaceae) that contains around 3630 species. Species typically have a single (monandrous), fertile anther which is erect and basitonic. Description The subfam ...
, tribe
Orchideae Orchideae is a tribe of orchids in the subfamily Orchidoideae. Historically, it was divided into 2 subtribes, Orchidinae and Habenariinae. The subtribe Orchidinae alone contains about 1,800 species. However, although some phylogenetic studies hav ...
, subtribe Orchidineae. The relationship between ''Tsaiorchis'' and the rest of the subtribe is as shown in the
cladogram A cladogram (from Greek language, Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an Phylogenetic tree, evolutionary tree because it does not s ...
below. Although ''Tsaiorchis'' was shown to be sister to an expanded genus ''
Hemipilia ''Hemipilia'' is a genus of plants in the family Orchidaceae. It is native to China, Japan, the Himalayas, Indochina, Siberia, and southern Russia to Poland. Species 73 species are accepted. *''Hemipilia alpestris'' *''Hemipilia × alpestro ...
'', the two have significant differences. ''Hemipilia'' grows from
tuber Tubers are a type of enlarged structure that plants use as storage organs for nutrients, derived from stems or roots. Tubers help plants perennate (survive winter or dry months), provide energy and nutrients, and are a means of asexual reproduc ...
s, ''Tsaiorchis'' has horizontally extending
rhizome In botany and dendrology, a rhizome ( ) is a modified subterranean plant stem that sends out roots and Shoot (botany), shoots from its Node (botany), nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from ...
s. The detailed structure of the flowers is also different.


Species

''Tsaiorchis'' contains the following species: *'' Tsaiorchis neottianthoides'' T.Tang & F.T.Wang *'' Tsaiorchis keiskeoides'' (Gagnep.) X.H.Jin, Schuit. & W.T.Jin


References

Orchideae Orchideae genera Taxonomy articles created by Polbot {{Orchidoideae-stub