Chamaegastrodia vaginata was first described by Hooker f. (1890) as Aphyllorchis vaginata from an altitude of 5.000ft in Khasia Hills, India. Seidenfaden (1994) merged this description with another find, Spiranthes exigua which was described by Rolfe 1896 from Hubei (Hupeh), China to its today accepted name (WCSP). This merging though is not accepted by Dr. Garay (Seidenfaden 1994) who sees differences in the relative length of sheaths and internodes of the stem and in the shape of the petals. Furthermore Garay suggests A. vaginata to be a peloric form of Chamaegastrodia asraoa (today Odontochilus asraoa). If this turns out to be the case the validity of Chamaegastrodia as an independant genus is questionable (efloras 2021). Maekawa (1971) on the other site notes that S. exigua is most likely identical to Chamaegastrodia shikokiana, the resulting name C. exigua is denied by Seidenfaden (1994). Seidenfaden (1994) is not free of doubts of his classification and sees the clarification in further analysis of similar plants from this region. C. vaginata differs from all other species of this genus in a simple lip. The flowers of this 4 to 6 cm small plant are dingy red. It can be found in altitudes from 1.000 to 1.600 m in the before mentioned areas and Sichuan.
Chamaegastrodia vaginata (Hooker f.) Seidenfaden 1994
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