SatyriumJ] 



CXXXIII. ORCHIDILE (rOLFE). 



268 



narrower than the odd or front sepal. Lip superior, sessile at the base of 

 the column, erect, galeate or cucullate, base more or less united to the 

 lateral sepals, produced behind into a pair of descending spurs or sacs, 

 rarely without a sac or with a pair of additional sacs outside the normal 

 pair. Column erect under the lip, short or somewhat elongated, 

 divided at the apex into two lobes, the upper convex or rarely con- 

 cave, bearing the pulvinate stigma on its anterior surface, the lower 

 anticous and forming the rostellum. Anther hanging under the 

 rostellum or horizontal, cells nearly parallel; pollinia granular, each 

 with a slender stipes and gland, or rarely the glands united. Ovary 

 and pedicel not twisted. — Terrestrial herbs with undivided tubers. 

 Leaves few and basal, or more numerous and cauline, decreasing 

 upwards into the bracts. Spikes usually dense or many-flowered ; 

 flowers small or medium-sized. Bracts membranous, sometimes large, 

 often reflexed after flowering. 



A genus of about 100 species, most numerous in extra-tropical South Africa, with 

 about five representatives in the Mascarene Islands and one in India. It is readily 

 distinguished from otlicr genera of Disece by the dorsal position of the relatively large 

 two-spurred lip, with the odd sepal in front. 



*Lip with two spurs, slender or tapering at the apex, and 

 longer or rarely shorter than the limb. 

 Leaves two, basal, suborbicular, appressed to the 

 ground (not known in 3). 

 Lateral sepals oblong, 7-9 lin. long. 



Spurs 9 lin. long 1, S. hifolium. 



Spurs 5 lin. long 2. S. Carsoni. 



Lateral sepals linear, 5-6 lin. long . . . Z. S. cheirophorum. 



Lateral sepals oblong, 2-4 lin. long. 



Lip half united to the lateral sepals . . . 4. /S. Johnsoni. 



Lip a fifth united to the lateral sepals . . 5. -S. orhiculare. 



Leaves two or more, usually cauline, or more or less 

 erect or ascending (not known in 6, 8 and 19). 

 Lip with a pair of short sacs in addition to the 

 usual spurs. 

 Lip 2:^ lin. long, and as broad . . . . 6. <S, ^acculatum. 



Lip If lin. long, slightly over half as broad . 7. S. shirense. 

 Lip with a pair of spurs only. 



Spurs over an inch long . . . . . 8. ^S". longissimum. 



Spurs under an inch long. 



Spurs much diverging from the pedicels. 

 Spurs much incurved. 



Lip 2-2>\ lin. long . . . .9.-5'. riparium. 



Lip 3-3i lin. long . . . . \Q. S. Volkensii. 



Spurs recurved . . . . . 11. S. minax. 



Spurs parallel to the pedicels or nearly so. 

 Lip 2-2| lin. long, somewhat fleshy. 



Bracts reflexed after flowering (Eastern 

 species). 

 Lip with basal third united to the lateral 

 sepals. 

 Spurs 3i lin. long . . . . 12. iS". elongatum. 



Spurs 6 lin. long .... 13. S. chlorocorifS. 



