Disa. | CXXXIII. ORCHIDEZ (BROWN). 287 
broad ; the lateral sepals 3} lin. long, 1? lin. broad ; the petals 12 lin, high; and the 
lip 5 lin. long. They are probably starved specimens or seedlings flowering for the 
first time. 
45. BROWNLEBEA, Harv. ; Benth. et Hook. f. Gen. Pl. iii. 631 
(by N. E. Brown). 
Lateral sepals free, dorsal adhering to the petals into a helmet- 
or extinguisher-shaped galea, produced behind into one spur. Petals 
erect, adhering to the inner sides of the mouth of the dorsal sepal, 
and adnate to the column at the base. Lip minute, entire. Column 
short. Anther horizontal, more or less incurved, with two parallel 
cells, produced in front into channels, which continue up the back of 
the rostellum; pollinia solitary in each cell, granular, each mass 
attached by a caudicle to a distinct gland. Rostellum erect, more or 
less distinctly 2-lobed, lobes notched at the apex, tuberculate on the 
sides at the base. Stigma seated at base of the rostellum, vertical 
or oblique, cushion-like. Capsule cylindric, erect.—Terrestrial herbs 
with simple sessile tubers. Stem rather slender, with 2—4 distant leaves. 
Flowers small or of moderate size, in lax or dense spikes, sometimes 
secund, rarely solitary. 
Species about 10, chiefly South African, one in Madagascar. 
This genus only differs from Disa in having the petals adherent to the dorsal 
sepal, forming a hood, as in the Coryciee. This character was overlooked in the key 
to the subtribe, p. 14. 
Lip linear į ° . a - e e . 1l. B. alpina. 
Lip broadly oblong . 5 é : S ` . 2. B. apetala. 
1. B. alpina, A E Brown. Plant 8-24 in. high, quite glabrous. 
Leaves two or three and a basal sheath, distant, erect, the lower one 
3-9 in. long, 3-7 lin. broad, broadly linear, or linear-lanceolate, taper- 
ing to an acute point, the upper much smaller, sometimes bract-like. 
Spike 1}-3 in. long, dense, with erect flowers. Bracts equalling or 
Shorter than flowers, 4-4 in. long, ?-1} lin. broad at base, lanceo- 
late, attenuate to an acute point. Dorsal sepal 14 lin. long, ł lin. 
broad, boat-shaped, arching forwards, and forming a hood with petals ; 
spur 14-1} lin. long, cylindrical, obtuse, abruptly curved downwards 
at its middle. Lateral sepals 1} lin. long, 4 lin. broad, subfalcate- 
oblong, subacute, margins incurved in the apical part. Petals about 
l lin. long and 3 lin. broad, elliptic, obtuse, entire, erect, upper 
margin involute, and slightly adhering to dorsal sepal. Lip minute, 
- lin. long, linear obtuse. Anther horizontal. Rostellum erect, 
Short and broad, shortly bifid or emarginate, with a globose tubercle on 
each side at its base.—Disa alpina, Hook. f. in Journ. Linn. Soe. vii. 
220. Engler, Hochgeb. Fl. Trop. Afr. 186. D. Preussii, Kränzl. in 
Engl. Jahrb. xvii. 64. 
Upper Guinea. Cameroons, 6000-8000 ft., Mann, 2120! Johnston, 86! 
Preuss, 973 ! 
2. B. apetala, V. E. Brown. Stem and leaves not described. 
Flowers very minute, flesh-coloured. Dorsal sepal galeate, ovate, 
