264 



CXXXIII. ORCHIDEiE (rOLFE). 



[Satyri 



um. 



Lip with basal fourth united to the 

 lateral sepals .... 



Bracts not reflexed after flowering (Angolan 

 species) ...... 



Lip 2^-4 lin. long, somewhat membranous. 

 Lip as broad as long ..... 



Lip longer than broad. 



Spurs as long as or longer than the lip. 

 Sepals more or less distinctly longer 

 than the lip. 

 Spikes dense (Eastern species). 

 Lip 3|-4 lin. long. 



Spurs twice as long as the 



sepals .... 



Spurs slightly longer than the 

 sepals .... 



14. S. Krcenzlinii. 



15. ^S". mechovnanum. 



16. S. coriophoroides. 



lY. S. densnm. 

 18. S, Bucharkani. 



Spurs not twice as long as the 

 sepals. 

 Lip strongly constricted be- 

 low the reflexed apex . 

 Lip scarcely constricted below 

 the suberect apex 

 Spurs twice as long as the sepals 

 or more .... 



Spikes rather lax (Angolan species) 

 Sepals more or less distinctly shorter 

 than the lip (Abyssinian species). 

 Spurs 5-6^ lin. long 

 Spurs 2|-3 lin. long 

 Spurs not or scarcely as long as the lip. 

 Lip 3-4 lin. long. 



Lip over half as broad as long . 

 Lip half as broad as long 

 Lip 2-2f lin. long . . . . 



Lip 6 lin. long ...... 



^Lip with two short, obtuse sacs, much shorter than the 

 limb. 



Sepals and petals 5-6 lin. long. 



Column 3 lin. long . . . . . 



Column 2-2:^ lin. long. 



Spurs l-\\ lin. long . . . . . 



Spurs scarcely \ in. long . . . . 



Sepals and petals 2 lin. long . . . . 



**Lip without a sac ....... 



19. S. Kirkii. 



20. S. niloticum. 



21. S. crassicaule. 



22. S. Ivanialce. 



23. S. hrachypetalum. 



24. S. Schimperi. 



25. S. zomhense. 



26. S. occultum. 



27. S. Nuttii. 



28. S. Wehvitschii. 



29. S. breve. 



30. S. leucocomos. 



31. S. paludosum. 



32. S. longibracteatum. 



33. S. Mechotcii. 



18, 



high. 



1. S. bifolium, A. Rich, in Ann. Sc. Nat. ser. 2, xiv. 273, t 

 fig. 2. Tubers ovoid-oblong, 7-13 lin. long. Plant IJ-lf 

 with two suborbicular horizontal leaves at the base, and five to seven 

 oblong-lanceolate, subobtuse sheaths above. Leaves 2-4 in. broad. 

 Kacemes oblong, 2J-4J in. long, rather dense. Bracts ovate or ovate- 

 lanceolate, acute, 9-14 lin. long. Pedicels 5-6 lin. long. Sepals 7-0 

 lin. long ; odd one cuneate-oblong, obtuse ; lateral much broader. 

 Petals united for a fifth of their length to the sepals, narrower than 



