188 ORCHIDS OF THE CAPE PENINSULA. 
Has. Grassy places, or near bushes, lower slopes of the Devil’s Peak, near 
Wynberg, &c., 50—300 ft., fl. Sept., Ecklon, 673; Bolus, 3930, &c.—Extends to 
Stellenbosch (Herb. Norm. Austr.-Afr., 337), Clanwilliam, and eastward to Voor- 
mansbosch, Swellendam.—Zeyher, 3948; Drege, 1255. 
The flowers are pale sulphur-yellow, the whole plant becoming 
black in drying. Quite distinct in habit from any other, but otherwise 
closely allied to P. caffrum; the appendage to the lip, though more 
complex in structure, is formed upon the same general type as that of 
the last-named. It is not very common within our limits. 
§ 2. Ommatodium., 
7. Pterygodium Volucris, Swartz, in Kongl. Vetensk. Acad. Handl., 
vol. xxi. (1800), p. 218.—Six to fourteen inches high; stem nearly 
straight, distantly leafy ; lowest leaf radical, ovate or oblong, acute, 
subcordate and loosely sheathing at base, nerved, laxly spreading, 
23-4 in. long, the second often distant and smaller, succeeded by a 
single, loose, erect sheath ; spike narrow, cylindrical, many-flowered, 
usually about half the length of the stem, bracts lanceolate, reflexed ; 
flowers about 6 lines long and 4 lines wide; odd sepal linear-oblong, 
obtuse ; side sepals oval, subobtuse, spreading, small ; petals somewhat 
triangular, the upper margin turned down like a flap; limb of the 
lip broadly triangular, or subhastate, with a lobe on either side at the 
base, and a transverse flap-like process in front, the appendage goblet- 
shaped with a narrow stalk, the rim notched in front and sloping 
downward obliquely to the back; arms of the rostellum ascending 
high on either side of the appendage, carrying the erect, inverted, 
distant anther-cells, the glands of the pollinia situate at the base of the 
latter, and very near to the distant stigmas; ovary oblong, prominently 
ribbed. Thunberg, Flor. Cap., ed. 1823, p. 22; Ker, in Journ. Sci. 
R. Inst., vol. ix.? (1820), t. 4, f. 1. Ophrys Volucris, Linneus, the 
younger, Suppl. (1781), 403. Ommatodium Volucris, Lindley, Gen. 
& Sp. Orch. (1838), p. 865. 
Has. In rather dry places at the foot of Table Mountain on the eastern side, 
300 ft., fi. Sept.—Oct., Bolus, 4886.— Extends northward to the mountains of 
Namaqualand (about Klipfontein at 3000 ft.), and eastward to Swellendam. 
The flowers are pale yellow, the habit that of some Satyrium. The 
structure of the appendage to the lip is peculiar, and the erect inverted 
anther induced Lindley to regard it as forming a distinct genus. This 
species is not very common on the Peninsula, but appears to be widely 
spread, and extends into a very dry region in Namaqualand, where the 
average rainfall probably does not exceed 5 in. yearly, and where I 
found it growing together with Disperis purpurata, Reichb. f., var. 
namaquensis (D, namaquensis, mihi). 
