Dendrobium sutepense Rolfe ex Downie, Bull. Misc. Inform. Kew 1925: 374, 1925

Ormerod, Paul, Kurzweil, Hubert & Watthana, Santi, 2021, Annotated List of Orchidaceae for Myanmar, Phytotaxa 481 (1), pp. 1-262 : 119-120

Dendrobium sutepense Rolfe ex Downie, Bull. Misc. Inform. Kew 1925: 374, 1925

Specimen examined:— MANDALAY. Pyinoolwin District: Hartwell s.n. in Mamyo Bot. Gard. 31 ( K) . SHAN. Taunggyi District : fide Aung et al. (2020: 82) .

Distribution:— Central Myanmar and Thailand.

Dendrobium terminale C.S.P.Parish & Rchb. f., Trans. Linn. Soc. London 30: 149, 1874. Type :— MYANMAR. Mon State : Mawlamyine District, Parish 33 (lectotype K, designated by Clayton 2017: 69; isolectotype: W-R 40385 )

Homotypic synonyms: Callista terminalis (C.S.P.Parish & Rchb.f.) Kuntze, Revis. Gen . Pl. 2: 655, 1891. Aporum terminale (C.S.P.Parish & Rchb.f.) M.A.Clem., Telopea 10: 297, 2003.

Specimens examined:— SAGAING. Kale District : fide Aung et al. (2020: 82). TENASSERIM. 5 Jun 1932, Kerr O1006 ( AMES, K, P) . MON. Mawlamyine District : type . TANINTHARYI. Dawei District: 245 m, Sep 1961, Keenan et al. 5467 ( E, K). Also reported from Mandalay Region by Kress et al. (2003: 75), but we have not seen material from this area.

Distribution:— The eastern Himalayas, northeastern India, Myanmar, Thailand, Vietnam, southwestern China and Peninsular Malaysia.

Dendrobium thyrsiflorum B.S.Williams, Orch. -Grow. Man., ed. 4: 172, 1871. Type :— MYANMAR. Mon State : Mawlamyine District, cult. Williams s.n. (holotype: not located)

Homotypic synonym: Callista thyrsiflora (B.S.Williams) M.A.Clem. , Telopea 10: 289, 2003.

Heterotypic synonyms:? Dendrobium schroederi B.S.Williams, Nursery Cat. (B.S.Williams) 1869 (Spring): 8, 1869.

Dendrobium schroederi Dombrain, Fl. Mag. (London) 9: t. 502, 1870.

Dendrobium densiflorum Lindl. var. walkerianum Warner, Select Orch. 3: t. 21, 1878. Dendrobium thyrsiflorum B.S.Williams var. walkerianum (Warner) H.J.Veitch, Man. Orch. Pl. 3: 80, 1888. Type :— MYANMAR. Mon State: Mawlamyine District, comm. & imp. s.n. (holotype: not located).

Dendrobium galliceanum Linden , Lindenia 6: 5, 1890.

Specimens examined:— KACHIN. Bhamo District : comm. & imp. s.n. ( K, W-R 6221 ) . CHIN. Mindat District : 9 Aug 2008, Yasuda 060020 ( MBK) . MANDALAY. Pyinoolwin District : 915 m, 18 May 1915, AR 112 ( RAF) , ident. uncertain [fragment]; Mandalay District: Rimann s.n. ( W-R 6559 ) ; Myingyan District: 1 Apr 2006, Khin Myo Htwe 103 ( MBK [s], TNS), fide Tanaka et al. (2015: 77) . SHAN. Hopang District : 1525 m, Apr 1938, Dickason & Ohn Tiu 9275 ( AMES) ; Taunggyi District: fide Moore (1895: 171); same loc., 1525 m, May 1938, Dickason 7874 ( AMES) ; Kengtung District: 1280 m, 25 May 1940, Dickason 9699 ( AMES) . MON. Mawlamyine District : types. Also reported from Putao District in Kachin State by Saw Lwin (2007: 255 & 256), but we have not seen material from this area.

Distribution:— The eastern Himalayas, northeastern India, Myanmar, Thailand, Indochina and southwestern China.

Notes:— This species was validly described by B.S.Williams in 1871. However, the earlier name D. schroederi B.S.Williams may be the correct epithet. The treatment of ‘schroederi’ is confusing in the literature; some authors insist it is a semi-alba form of D. densiflorum . The plant on the plate of D. schroederi Dombrain is likely from the same importation as Williams’ taxon and seems the same as what is now called D. thyrsiflorum .

Dendrobium tortile Lindl., Gard. Chron. 1847: 797, 1847 . Type:— MYANMAR (‘Java’). Tanintharyi Region: Myeik District, Lobb s.n. (holotype: K-LINDL)

Homotypic synonym: Callista tortilis (Lindl.) Kuntze, Revis. Gen . Pl. 2: 655, 1891.

Heterotypic synonym: Dendrobium tortile Lindl. var. roseum Sander , Sander’s Orch. Guide: 76, 1901. Type:— MYANMAR. Mon State : Mawlamyine District, without collector s.n. (not located) .

Specimens examined:— KAYIN. Thaungyin Valley: Bogg 13541 ( K). TENASSERIM. Parish 17 (not located), fide Parish (1883: 192) . MON. Mawlamyine District : type . TANINTHARYI. Dawei District: Apr 1901, Mokim 570 ( AMES, P); Myeik District : type .

Distribution:— Northeastern India, Myanmar, Thailand, Indochina and Peninsular Malaysia.