PTERYGODIUM. 188 
X.—PTERYGODIUM. 
Swartz, in Kongl. Vetensk. Acad. Nya Handl., vol. xxi. (1800), p. 217, 
t. 8, fig. EL; Bentham & Hooker, f., Gen. Plant., vol. iii. (1888), 
p- 682. (Ommatodium, Lindley, Gen. & Sp. Orch. (1838), 365). 
Odd sepal posticous, cohering with the larger petals into an erect, 
hood-shaped, or vaulted piece; side sepals free, of nearly the same 
shape and size as the odd sepal, spreading, ascending or reflexed. 
Lip adnate by its middle portion to the column, the limb deflexed, 
variously shaped, undivided, or 2—8-lobed, entire, crenate, or fringed, 
usually smaller than the petals, produced above the junction with the 
column into a variously-shaped, thick, fleshy appendage. Column 
short, the rostellum (or the connective of the anther?) produced 
transversely into two arms, each of which bears one of the distant 
cells of the anther on its outer margin or on its posterior face ; 
pollinia solitary in each cell, granules cuneate, caudicle terminating 
in a gland, which is either uppermost, or, in one species, inverted 
and below, and the viscid dise of which usually faces towards the back 
of the flower. Stigma situate between the arms of the rostellum, horse- 
shoe-shaped, or stigmas two, more or less distant, cushion-like, soft 
and tuberculate. Capsule erect, cylindrical or obovate, sometimes tri- 
quetrous, the ribs often prominent.—Terrestrial, erect, glabrous herbs, 
with small, undivided, sessile tubers; stems leafy ; flowers densely 
spiked, or in a loose few-flowered raceme, chiefly yellow, more rarely 
red or purple-coloured. (Name from wrepuywdns, wing-like). 
Distrisution.—Twelve species are known, all South-African, of 
which 8 occur on the Peninsula; 3 in the western districts; and 1 
exclusively eastern, reaching to the Drakensbergen, north-west of 
Natal. 
The sections of this genus proposed below are based upon three 
distinct types of perianth. The last, Micranthum, closely approaches 
the previous genus Corycium. 
§1. Eupterygodium. — Flowers expanded; anther erect or 
ascending, the glands of the pollinia uppermost. Species 1 to 6. 
§2. Ommatodium. — Lindley (as a genus), Gen. & Sp. Orch. 
(1838), p. 865.—Flowers expanded; anther inverted, the glands of 
the pollinia situate below. Species 7. 
§ 8. Micranthum.—F lowers contracted, like those of Corycium ; 
anther erect or ascending. Species 8. 
