44- ORCHIDACEAE I53 



27. (21.) Glands of the rostellum transversely connate. Rostellum narrow. 



Stigmatic surface small. Basal appendages of the pollen-masses short. 

 Column short. Lip with a short spur. — Species 40. Tropical and South 

 Africa. (Including Biicculina Lindl., Deroemeria Reichb. fil., Monotri& 

 Lindl., Saccidium Lindl., Scopularia Lindl., and Tryphia Lindl.) 



Holothrix L. C. Rich. 

 Glands of the rostellum free 28 



28. Glands large, surrounded by a thin membrane, which proceeds from the 



rostellum and is removed together with the glands. Lip with a very 

 short spur. Flowers very small. — Species i. Island of Reunion. 



Herminium L. 

 Glands naked, rarely enclosed by processes of the anther, but then small. 29 



29. Petals clawed ; blade deeply concave, fringed. Lip fringed, not spurred. — ■ 



Species 4. South Africa. (Including Hallackia Harv.) Huttonaea Harv. 

 Petals not clawed, flat or shghtly concave 30 



30. Rostellum forming a narrow fold between the anther-cells. ... 31 

 Rostellum broad, triangular, placed below the anther-cells. • ■ • 33 



31. Column short. Stigmatic surfaces convex. Lip shortly or not spurred. 



Flowers yellow or white. ^ — ■ Species 5. South Africa and southern East 



Africa. {Schizochilus Send.) Gymnadenia R. Br. 



Column long. Stigmatic surfaces concave 32 



32. Petals partly adnate to the column. Lip not spurred. Sepals and petals 



subequal. — Species i. South Africa. (Under Brachycorythis Lindl.) 



Neobolusia Schlecht. 

 Petals inserted below the column. ^ — Species 25. Tropical and South Africa. 

 (Including Schivartzkopfjia Kraenzl., under Platanthera Rich.) 



Brachycorythis Lindl, 



33. Lip with a spur 34 



Lip without a spur 36 



34. Lip 3-lobed, the side-lobes inflexed, covering the mouth of the spur. — ■ 



Species 3. Madagascar Bicornella Lindl. 



Lip 3-lobed, with erect or spreading side-lobes, or undivided. . . 35 



35. Lip fringed. Anther-cells approximate and parallel. — ^ Species 2. South 



Africa. Bartholina R. Br. 



Lip entire or crenate. Anther-cells divergent. — Species 20. The tubers 

 yield medicaments (salep) and mucilage. (Including Gennaria Pari., 

 under Hahenaria Willd.) Platanthera L. C. Rich. 



36. Lip 3-lobed. Column with 2 basal staminodes. Basal appendages of the 



pollen-masses very short.- — • Species 3. South Africa and southern East 



Africa. Stenoglottis Lindl. 



Lip undivided. Column without distinct staminodes. — Species 2. Mada- 

 gascar and Mascarenes Arnottia A. Rich. 



37. (i.) Pollen-masses soft, granular. Anthers usually persistent and withering. 



Inflorescence terminal. Leaves rolled up in the bud, with overlapping 

 edges. Usually terrestrial herbs. [Tribe NEOTTIEAE ] ... 38 



