Satyrium. ] CXXXIII. ORCHIDEÆ (ROLFE). 275 
and more than twice as broad, spreading. Petals united for nearly 
half their length to the sepals, and similar to the odd one. Lip 
galeate, 4-4} lin. long, the basal third united to the lateral sepals; 
mouth broad and round ; apex very broad and obtuse; spurs broadly 
saccate, scarcely 4 lin. long. Column 24 lin. long; stigma very broad 
and obtuse; very short, broad, and somewhat bilobed. 
Lower Guinea. Angola: Huilla ; Lopollo, near the River Ferrao da Sola, 
in swampy meadows, Welwitsch, 727 ! 
32. S. longibracteatum, Rolfe in Bolet. Soc. Brot. vii. 238. 
Scape tall, the upper part with three erect, lanceolate subacute sheaths, 
14-2 in. long, base and leaves not seen. Raceme short and dense, 2 in. 
long, many-flowered. Bracts linear-lanceolate, acute, spreading, much 
longer than the flowers, 3-1 in. long. Pedicels 24 lin. long. Sepals 
reflexed, obovate-elliptical, obtuse, with revolute margins, 2 lin. long, 
lateral broader and somewhat spreading. Petals united for a third 
of their length to the sepals, and similar to the odd one. Lip galeate, 
2} lin. long, the basal fifth united to the lateral sepals; mouth 1} lin. 
broad; apex broad and obtuse; spurs broadly saccate, obtuse, $ lin. 
long. Column 14 lin. long; stigma broadly triangular-ovate, sub- 
apiculate ; rostellum quadrate, emarginate or slightly bilobed. 
Lower Guinea, Angola: Huilla, Antunes, 17! 
33. S. Mechowii, Reichb. f. in Flora, 1882, 531. Leaves 4-8, 
decreasing upwards into the bracts. Raceme cylindrical, dense-flowered. 
Bracts lanceolate, acuminate, longer than the flowers, reflexed during 
flowering. Lip calceolate, arched in the middle, withont spurs. 
Lower Guinea. Angola: Malanje, Mechow, 234B. 
Only known to me from the description, in which it is said to be allied to 
S., paludosum, Beicht, f., but distinct in the absence of spurs, in which respect it 
resembles the South African S. muticum, Lindl. 
44, DISA, Berg. ; Benth. et Hook. f. Gen. Pl. iii. 630 
(by N. E. Brown). 
Sepals free, the odd one dorsal in the Tropical species, concave, 
hood-shaped, or helmet-shaped, with or rarely without one spur or 
sac. Petals usually much smaller than the sepals, generally more or 
less adnate to the column at the base, often included within the dorsal 
Sepal, but quite free from it, very variable in shape. Lip anticous, 
Sessile or clawed, entire, lobed, or fringed, but not crested. Column 
short. Anther erect, horizontal, or reflexed, 2-celled, the cells dis- 
tinct and parallel; pollinia solitary in each cell, granular, attached 
by short or long caudicles to one gland, or to two distinct glands, 
Seated at the apex or in the arms of the rostellum. Rostellum 
erect, subentire, bifid, or trifid at the apex, sometimes with side pro- 
cesses, often more or less adnate to the base of the petals, and some- 
times forming a ridge upon them. Stigma seated in front of the 
rostellum, cushion-like. Capsule straight or twisted, erect, subcylindric, 
