Crepidium acuminatum (D.Don) Szlach., Fragm. Florist. Geobot., Suppl.

Ormerod, Paul, Kurzweil, Hubert & Watthana, Santi, 2021, Annotated List of Orchidaceae for Myanmar, Phytotaxa 481 (1), pp. 1-262 : 77

Crepidium acuminatum (D.Don) Szlach., Fragm. Florist. Geobot., Suppl. 3: 123, 1995

Basionym: Malaxis acuminata D.Don, Prodr. Fl. Nepal.: 29, 1825.

Heterotypic synonyms: Microstylis biloba Lindl. , Gen . Sp. Orchid. Pl.: 20, 1830. Malaxis biloba (Lindl.) Ames , Orchidaceae 2: 122, 1908.

Microstylis wallichii Lindl. , Gen . Sp. Orchid. Pl.: 20, 1830. Malaxis wallichii (Lindl.) Deb, Bull. Bot. Surv. India 3: 128, 1961.

Microstylis purpurea Lindl. , Gen . Sp. Orchid. Pl.: 20, 1830. Malaxis purpurea (Lindl.) Kuntze, Revis. Gen . Pl. 2: 673, 1891. Crepidium purpureum (Lindl.) Szlach., Fragm. Florist. Geobot., Suppl. 3: 131, 1995.

Specimens examined:— KACHIN. Putao District: fide Aung et al. (2020: 73). CHIN. Mindat District: 1924, Cooper 6051 (E, SING); same loc., 1525–1830 m, 1 Jul 1956, Kingdon-Ward 22492 (BM); same loc., 2450−2750 m, 4 Jun 2002, Tanaka et al. 023510 (MBK); same loc., 1525 m, 26 Jun 2011, Ling Shein Man 087460 (MBK). MANDALAY. Pyinoolwin District: 915 m, Jul 1916, Lace 149 (E); Myingyan District: 8 Jul 2005, Khin Myo Htwe 48 (TNS [s]), fide Tanaka et al. (2015: 83); same loc., 10 Aug 2011, Kim s.n., photo. SHAN. Taunggyi District: 1565 m, 19 Sep 2015, Baba et al. m-587 (MBK); same loc., 1 Jul 2019, Kim s.n., photo. KAYAH. Loikaw District: Tanaka et al. MY4969 & MY4994 (TNS, photos seen). MON. Mawlamyine District: Parish 115 (K-LINDL); same loc., Parish 147 (K), fide Clayton (2017: 73). WITHOUT LOCALITY. Parish 356 (not located), fide Parish (1883: 190).

Distribution:— India, the Himalayas to Malesia and northern Australia.

Note:— Microstylis purpurea seems to be a synonym of this species. It has been reported from Myanmar based on Parish 356.