44- ORCHIDACEAE I5I 



7. Lip posticous (uppermost), produced behind into a pair of descending 



spurs or sacs. — Species 90. Tropical and South Africa. Some are 

 used in medicine. (Including Aviceps Lindl. and Satyridiuni Lindl.) 



Satyrium Swart z 

 Lip usually anticous, not spurred, but sometimes with a sac-like cavity. 8 



8. Odd sepal spurred or gibbous 9 



Odd sepal neither spurred nor gibbous 13 



9. Lip more or less saccate at the base 10 



Lip flat II 



10. Lip very small, adnate to the column. Stem rather rigid. Leaves in 



the middle of the stem. — Species 9. South Africa and mountains of 



the tropics Brownleea Harv. 



Lip rather large, free from the column. Stem very flexible. Leaves 

 at the base of the stem. — Species 6. South Africa (Cape Colony). 

 (Under Disa Berg) Schizodium Lindl. 



11. Rostellum with 2 distinct glands, to which the pollen-masses are attached ; 



side-lobes exceeding the middle-lobe. — Species no. Southern and 

 tropical Africa. Some are used as ornamental plants. (Including 



Penthea Lindl.) . . Disa Berg 



Rostellum with one gland ; sides-lobes, if present, not exceeding the 

 middle-lobe 12 



12. Stigma 2-parted. Rostellum with 3 narrow, subequal lobes. — ■ Species 



10. South Africa to Nyasaland. (Under Disa Berg). 



Herschelia Lindl. 



Stigma entire. Rostellum more or less hood-shaped, large. — Species 



15. South Africa. (Under Disa Berg). . . . Monadenia Lindl. 



13. Petals much narrower than the odd sepal, kneed. Lip kidney-shaped. 



Stigma not extended in two branches. — Species i. South Africa (Cape 



Colony). (Under Disa Berg) Forficaria Lindl. 



Petals and sepals subequal. Stigma with 2 erect, linear branches. — ■ 

 Species 2. South Africa (Cape Colony) Pachites Lindl. 



14. (2.) Stigma extended into two, usually elongated processes. [Subtribe 



HABF.NARIINAE.] I5 



Stigma not extended into processes, rather flat. Column very short. 21 



15. Stigmatic processes short, adnate to the lip. Rostellum small, not pro- 



longed into anther-channels. Column very short. — -Species 10. Tropics. 

 (Under Habenaria L. or Platanthera Rich.) . . . Peristylus Blume 



Stigmatic processes free 16 



t6. Column long, curved. Rostellum not prolonged into anther-channels. 

 Perianth subglobose. — Species i. Mascarene Islands. Acrostylia Frapp. 



Column short 17 



17. Rostellum or stigmatic processes 2-cleft. Base of the anther not enclosed 

 by a channel, but prolonged into solid processes. — Species 7. Central 

 Africa. (Under Habenaria Willd.) .... Roeperocharis Reichb. 



