teristic Diaphananthe tooth at the opening of the spur 
is present in all but one of the species of group B and is 
often identical with the similar structure in species be- 
longing to group A. In D. curvata (Rolfe) Summerh. 
this callus takes the form of a transverse ridge, but on 
other grounds the species seems correctly referred to 
Diaphananthe. 
Diaphananthe bidens (Swartz ex Persoon) Schlech- 
ter Die Orchideen (1914) 593. 
Limodorum bidens Afzelius ex Swartz in Kongl. Ve- 
tens. Akad. Handl. 21 (1800) 248, nomen tantum— 
Swartz ex Persoon Syn. Pl. 2 (1807) 521, descript. 
Angraecum ashantense Lindley in Edwards Bot. Reg. 
(1843) mise. p. 56. 
Angraecum monodon Lindley in Lindley & Paxton 
Flower Garden 2 (1851-52) 102, fig. 187. 
Angraecum Bakeri Kraenzlin in’ Mitt. Deutsch. 
Schutzgeb. 2 (1889) 159. 
Mystacidium productum Wraenzlin in Engler. Bot. 
Jahrb. 22 (1895) 30. 
Listrostachys mystacidioides Kraenzlin |.c. 28 (1900) 
170. 
Listrostachys longissima Kraenzlin |.c. 48 (1912) 400. 
Angraecum subfaleifollum De Wildeman in Bull. 
Jard. Bot. Brux. 5 (1916) 192. 
Diaphananthe ashantensis Schlechter in Beih. Bot. 
Centralbl. 36, Abt. 2 (1918) 98. 
Diaphananthe monodon Schlechter l.c. 
Diaphananthe mystacidioides Schlechter l.c. 99. 
Diaphananthe producta Schlechter |.c. 
Diaphananthe subfalcifoha Schlechter |.c. 100. 
Mystacidium Duemmerianum (Kraenzlin in Viertel- 
jahrsschr. Nat. Ges, Ziirich 74 (1929) 100. 
An examination and careful analysis of nearly sixty 
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