282 CXXXIII. ORCHIDEE (BROWN). [Disa. 
14 lin. long, 4—3 lin. broad, linear-spathulate or cuneate-oblong, obtuse 
or subacute; margins reflexed. Anther horizontal, % lin. long. 
Rostellum quadrate, minutely 3-tcothed at the subtruncate apex. 
Mozamb. Dist. British Central Africa: Nyasaland, Buchanan, 1070! 
Also in the Transvaal. 
The petals are obtuse in all the specimens I have examined, not acute as described 
by Schlechter. 
11. D. Emini, Kränzl. in Engl. Jahrb. xix. 248. Plant 20 in. or 
more high, glabrous. Stem slender. Radical leaves 9—10 in. long, 
4—5 lin. broad, linear-lanceolate, acute or acuminate; stem leaves 
sheath-like, acute. Spike about 5 in. long. Bracts about equalling 
the ovary, lanceolate, acuminate. Flowers about as large as those of 
D. polygonoides. Dorsal sepal extinguisher-shaped, oblong, obtuse at 
the mouth, tapering behind into a filiform spur an inch long, straight 
or curved, ascending, very slightly inflated towards the apex. Petals 
obovate or spathulate, very obtuse. Lip extended, similar to the petals, 
but longer. 
Mozamb. Dist. German East Africa: Karagwe: Bukoba, Stuhlmann, 4089. 
I have not seen this plant, which is said to be allied to D. Walleri, Reichb. f., 
and D. hircicornis, Reichb. f, 
12. D. robusta, V. E Brown. Plant 2—24 ft. high, with a robust 
stem 4-5 lin. thick, clothed with short sheath-like leaves, with ovate, 
acute or acuminate tips, about as long as the internodes, and closely 
embracing the stem. Spike moderately dense, 4-6 in. long, 2-3 in. 
diam. Flowers large, light blue. Bracts 3-1} in. long, 44-6 lin. broad, 
lanceolate, acuminate or acute. Dorsal sepal 44-5 lin. in diam. at the 
mouth, extinguisher-shaped, gradually tapering from the mouth to a 
long, very ascending, acute, straight spur, rather slender in the apical 
part, and measuring from mouth to tip 1}-13in. Lateral sepals de- 
flexed, 6-7 lin. long, 34-4 lin. broad, oblong, obtuse, concave: Petals 
43-5 lin. long, 14-2 lin. broad in upper part, entire, falcate, lanceo- 
late, or linear-oblong, acute, auriculate at base in front. Lip 34-4 
lin. long, gradually tapering from the 1 lin. broad base to the acute 
apex. Anther horizontal, 14 lin. long. 
Mozamb. Dist. British Central Africa: Nyasaland; between Kondowe 
and Karonga, 2000-6000 ft., Whyte, 347! Shire Highlands; Wilandi, near Blantyre, 
4000 ft., Buchanan, 23! Mt. Zomba, 4000-6000 ft., Whyte! Mt. Malosa, 4000- 
6000 ft., Whyte ! 
13. D. Walleri, Reichb. f. Otia Bot. Hamb. ii. 105. Plant 2 ft. or 
more high, glabrous, only upper part of the stem seen. Leaves 0 
barren growth 8-10 in. long, 1-1ł in. broad, narrowly oblong Or 
strap-shaped, acute. Upper stem-leaves 2—34} in. long, lanceolate, 
acuminate, erect, clasping at base. Spike 5-10 in. long, 14-1} in. 
thick, not very dense. Flowers of moderate size. Bracts longer than 
flowers, 1-2 in. long, 3-5 lin. broad, lanceolate, acuminate. Do 
sepal erect, 6-8 lin. long, 4-44 lin. broad at the mouth, helmet-shaped, 
