186 CXXXIII. ORCHIDEH (ROLFE). [Pogonia. 
27. POGONTA, Juss. ; Benth. et Hook. f. Gen. PI. iii. 615. 
Sepals subequal, free, erect or rarely spreading. Petals similar to 
the sepals, or often broader or shorter, erect or declinate. Lip erect 
from the base of the column, free, without a spur, sessile or unguiculate, 
entire or trilobed; side lobes sometimes enfolding the column ; disc 
variously crested or lamellate. Column elongated, slightly clavate at 
the apex, without wings; clinandrium more or less elevated, entire or 
denticulate. Anther somewhat stipitate on the margin of the clinan- 
drium, more or less incumbent, obtusely conical or subglobose, imper- 
fectly 2-celled ; pollinia granular, 2, sometimes confluent into one, not 
tailed, free or sessile on the rostellum. Stigma oblong or broad ; 
rostellum short.—Terrestrial herbs. Rhizomes tuberiferous. Leaves 1 
to few, very various in shape, often not appearing until after the 
flowers. Flowers medium-sized or large, solitary or in erect or pen- 
dulous racemes. Bracts often small. 
A genus of about 60 species, widely dispersed through the tropics, with a few 
temperate representatives in North and South America and Japan. 
Side lobes of lip rounded, oblong or obscure, obtuse. 
Scapes over 4 ft. high. 
Flowers in racemes. 
Column dilated above 
Column not dilated above S 
Flowers 1 or 2 at the summit of the scape. 
. 
_ 
. P. umbrosa. 
P. viridiflava. 
ba 
Front lobe of lip broad and nearly flat . 3. P. shirensis. ` 
Front lobe of lip narrow and strongly reflexed . 4. P. Buchanant. 
Scapes 2-3 in. high : . 5. P. Thouarsit. 
Side lobes of lip triangular, acute . 6. P. Kotschyt. 
1. P. umbrosa, Reichb. f. in Flora, 1867, 102. Tuber ovoid- 
globose. Leaf solitary, long petiolate; limb broadly ovate-reniform 
or flabellate, repand or sinuate, more or less broadly apiculate or acute, 
34-6 in. long, 23-7 in. broad ; petioles 14-8 in. long. Scapes 14-2} ft. 
long; raceme 2-8 in. long, 3—12-flowered.  Bracts linear or linear- 
lanceolate, acuminate, 4-1 in. long. Pedicels slender, 3-4 lin. long. 
Flowers light green with a purple-veined white lip. Sepals lanceolate, 
acute, or subacuminate, 10-13 lin. long. Petals similar to, but a little 
shorter than, the sepals. Lip subtrilobed, 1 in. long, ł in. broad ; side 
lobes broadly rounded ; front lobe ovate-triangular, acute; disc with a 
pair of slightly thickened keels from the base to the middle, Column 
slightly curved, a little thickened above, 4 lin. long ; filament of the 
anther slender, 1 Ä Dn. iong. Capsule broadly elliptic-oblong, 6-7 lin. long. 
Upper Guinea. Sierra Leone, near Falaba, Scott-Elliot, 5119! Niger Terri- 
tory ` Nupe, among grass and low shrubs in shady places, Barter, 1540! f 
Lower Guinea. Princes Island, Mann, 1149! St. Thomas, 1300 ft., Quintas, 
4! 5! 13! near Fazenda do Monte Caffe, Welwitsch, 739! Island of Rolas; on Mount 
Greeff, Quintas, 63! Angola: Pungo Andongo; near the River Quilonga, in woods, 
Welwitsch, 738! 
Very near to the South African P. purpurata, Reich. f. 
2. P. viridiflava, Reichb. f. in Flora, 1882, 532. Allied to P. 
