276 CXXXIII. ORCHIDEZ (BROWN). [ Disa. 
clavate, or narrowly ellipsoid.—Terrestrial herbs, with simple sessile 
tubers. Leaves appearing with or before the flowers ; the larger foliage- 
leaves often produced on a distinct growth from ‘that which bears 
flowers; those of the flowering stem often reduced to sheaths. Flowers 
large or small, solitary, corymbose, racemose, or in dense or lax spikes, 
bracteate. . 
Species about 130, mostly South African, a few in Madagascar. 
*Dorsal sepal spathulate, with a distinct channelled claw. 
Anther erect. 
Dorsal sepal 14-2 in. long. Apical part of petals 
linear, 2—3 times as broad as the middle part . 1. D. Carsoni. 
Dorsal sepal about 1 in. long. Apical part of petals 
linear, scarcely broader than the middle part . 2. D. erubescens. 
Dorsal sepal 7-8 lin. long. Upper pai of petals 
linear-spathulate . 3. D. zombica. 
** Dorsal sepal not spathulate and without a claw, but 
sometimes cuneately narrowed to the base. 
Anther erect. Dorsal sepal concave or boat-shaped ; 
spur 14—44 lin. long, pendulous from its base. 
Lip near with a tooth on each side at its base . 4. D. scutellifera. 
Lip linear without teeth at its base. 
Petals 2—lobed. 
Spike 5-8 in. long, 3—1 in. thick. 
Posterior lobe of petals linear, sigmoid, 
obtuse . ; : 5. D. Schimperi. 
Posterior lobe of petals linear-lanceolate, 
acute . 6. D. ochrostachya. 
Spike 1-5 in. long, 342 in. ‘thick, very 
dense. Posterior lobe of E sub- 
spathulate or obovate e 
Petals entire, lanceolate, acute è 
Anther horizontal. Dorsal sepal hood-shaped ; spur 
8-9 lin. long, pendulous from its base . , 9. D. Stairsii, 
Antber horizontal. Dorsal sepal helmet or ex- 
tinguisher-shaped ; spur usually with a broad 
conical base, ascending, horizontal, or re- 
curved (subpendulous in D. versicolor). 
Lip entire. 
Spur slender, several times longer than its 
apical diameter. 
Spur straight. 
Flowers under ? in, in diam. 
Spur 23-3 lin. long. Petals oblong, 
obtuse ` . 10. D. saxicola. 
Spur 1 in. long. Petals ‘obovate or 
spathulate, obtuse . 11. D. Emini. 
Flowers about 1 in. in diam. Spur ii 
in, long, petals falcate, acute . . 12. D. robusta. 
Spur curved or subpendulous. 
Flowers large, more than 3 in. in diam. 
Petals linear, faleate, obtuse 5 . 13. D. Waller. 
Flowers small, 
Petals obovate or spathulate, obtuse . 11. D. Emini. 
Petals rhomboid-oblong, acute . . 14. D. hircicornis. 
. D. Welwitschii. 
, D. Deckenii. 
o N 
