278 CXXXIII. ORCHIDEZ (BROWN). [ Disa. 
shaped limb 4 in. long, 3—4 lin. broad, arching forward, with a slender, 
clavate spur 5 lin. long, ascending or horizontally directed from its 
middle (Ge, 8-9 lin. above the base of the sepal). Lateral sepals 8-9 
lin. long, 3 lin. broad, spreading and more or less ascending, oblong, 
subacute and slightly hooded at the apex, obliquely attached at the 
base. Petals 10-11 lin. long, broadly auricled at the base, linear above ; 
the auricle 5 lin. long, 24 lin. broad, semicordate, tapering upwards; 
the linear part 5-6 lin. long, 4-3 lin. broad, channelled down the face, 
with a double curve, first downwards or outwards, then upwards, at 
the middle, obtuse. Lip 6 lin. long, ł—} lin. broad, linear. Anther 
erect, 2-3 lin. long, oblong. Rostellum short, truncate, folded between 
the anther-cells. 
A Zheng Land. British East Africa: Ruwenzori, 6000-7000 ft., Scott-Elliot, 
809! , 
Mozamb. Dist. British Central Africa: Fwambo, S. of Lake Tanganyika, 
5250 ft., Nutt ! Nyasaland; between Kondowe and Karonga, 2000-6000 ft., Whyte, 
348! Plateau of Mount Zomba, 5000-6000 ft., Whyte ! 
The Fwambo specimen is more slender than the others, with lanceolate acuminate 
bracts as long as, or longer than, the flowers, and has dried a different colour, but in 
floral structure is indistinguishable. 
3. D. zombica, A. E. Brown. Plant 13-2 ft. high, glabrous. 
Leaves of barren shoot 5—7 in. long, 6-8 lin. broad. Leaves of stem 
14-2 in. long, 8-9 lin. broad, ovate or lanceolate, acute or acuminate, 
erect and somewhat appressed. Spike 6-7 in. long, 14 in. thick, 
moderately dense. Flowers of moderate size. Bracts longer than 
the flowers, 14-2 in. long, 4-5 lin. broad, lanceolate, acuminate. 
Dorsal sepal erect, 7-8 lin. long, with a channelled claw about 4 lin. 
long, 14 lin. broad, and a hooded limb 3-4 lin. long, 24-3 lin. broad, 
obtusely rounded at the apex, cuneate into the claw at the base, 
with a clavate, pendulous spur 24 lin. long, ł lin. thick, at the 
junction of the limb and claw. Lateral sepals spreading and ascending, 
7-74 lin. long, 3-34 lin. broad, oblong, obtuse and concave at the apex, 
obliquely attached at the base. Petals 7-8 lin. long, entire spathulate- 
lanceolate, obtuse, with semicordate auricles at the base, 14 lin. broad, 
tapering above, the spathulate part 14 lin. broad. Lip 64-74 lin. long, 
3 lin. broad, linear, obtuse. Anther erect, 23 lin. long, oblong. Ros- 
tellum short, dorsally keeled between the anther-cells; keel produced 
into a minute tooth. 
Mozamb. Dist. British Central Africa: Nyasaland; Top of Zomba Mountain, 
Buchanan 305! 
4. D. scutellifera, A. Rich. in Ann. Sc. Nat. sér., 2 xiv. 272, t. 18, 
f- 1. Plant 14-2 ft. high. Stem leafy to the top. Leaves longer than 
the internodes, erect, their non-sheathing portion 3-34 in. long, 8-12 
lin. broad, decreasing upwards, lanceolate-oblong or ovate-oblong, acute. 
Bracts 1-1} in. long, 5-6 lin. broad, lanceolate or oblong-lanceolate, 
acuminate. Dorsal sepal 6-7 lin. long, 4 lin. broad, erect, rhomboid, 
subacute, broadly boat-shaped ; spur slender, 4 lin. long, 4 lin. thick, 
