Disperis.] CXXXIII. ORCHIDEE (ROLFE). 289 
frequently penicillate or papillose at the apex. These peculiarities are evidently 
connected with the fertilisation of the flower, the details of which are at present 
unknown. 
Leaf solitary . $ S 
Leaves two or three, alternate. 
Dorsal sepal distinctly saccate. 
Limb of lip lanceolate or ovate. 
S ` S S , 1. D. crassicaulis. 
Limb of lip with rounded auricles 2. D. galerita. 
Limb of lip without auricles. 
Appendage of lip bilobed 3. D. Metro, 
Appendage of lip obtuse 4. D. kilimanjarica. 
Limb of lip divergently 2-armed 5. D. reichenbachiana. 
Dorsal sepal slightly gibbous 6. D. Johnstoni. 
Leaves two opposite. 
Spur short, broad and curved 7. D. Kerstenii. 
Spur long, tapering, and straight. 
Lip sharply reflexed; spur under } in. long. 
Limb of lip lanceolate, much larger than the 
tooth-like appendage ° 5 ° = 10; D Preussi. 
Limb of lip linear, much smaller than the bilobed 
appendage : ` : : - , 9. D. nemorosa. 
Lip not reflexed; spur over } in. long . “ . 10. D. Anthoceros. 
1. D. crassicaulis, Reichb. f. in Linnea, xxii. 860. Stem stout, 
2-84 in. high, l-leaved. Leaves alternate, sessile, broadly cordate 
orbicular, 4—1 in. broad. Racemes 2- or 1-flowered. Bracts ovate or 
ovate-oblong, obtuse, 4-7 lin. long. Pedicels 3—4 lin. long. Dorsal 
sepal confluent with the petals into a broad hood, 3—4 in. long; sides 
broadly rounded; inflexed apex with a tooth-like apiculus; lateral 
sepals spreading, obliquely and broadly oblong, apiculate on one side 
above the middle, gibbous or subsaccate close to the apiculus, 4 lin. 
long. Petals confluent with the dorsal sepal. Lip with slender claw, 
2 lin, long; upper third free; limb sharply reflexed, 1} lin. long, 
marrow and recurved in front, dilated with reflexed sides and rounded 
auricles behind, puberulous; appendage triangular-oblong, ł lin. long, 
curved towards the mouth of the galea, puberulous. Column very 
broad, 1? lin. long ; arms of rostellum linear-oblong, curved, 1 lin. long. 
—Walp. Ann. iii. 593; Engl. Hochgeb. Fl. Trop. Afr. 186. Ptery- 
godium biflorum, Hochst. ex A. Rich. Tent. Fl. Abyss. ii. 303. 
Nile Land. Abyssinia: Tigre; Mt. Sholoda, near Adowa, Quartin-Dillon (ex 
pe Semen; mountainous region between Enjedcap and Shoata, Schimper, 
2. D. galerita, Reichd. f. Otia Bot. Hamb. ii. 103. Stem 3-6 in. 
high, 3-4-leaved. Leaves alternate, sessile, ovate or ovate-oblong, 
obtuse or apiculate, 7-14 lin. long, 5-7 lin. broad, the lower one re- 
duced to a sheath. Raceme 3-flowered. Bracts like the leaves, and 
only a little smaller. Pedicels 3 lin. long. Flowers rose-purple. Dorsal 
Sepal galeate, 5 lin. long, prolonged behind into an oblong, obtuse sac, 
1 lin. long; apex incurved, acute; lateral spreading, oblique, semi- 
ovate, subacute, 34 lin. long, produced behind near the inner margin 
nto an obtuse sac, 1 lin. long. Petals falcate-oblong, obliquely apicu- 
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