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Above brown, spotted with sulphur; beneath sulphureous, with black spots; head and chin black; feathers of the breast lengthened, and ending in long setaceous hairs.

Nostrils basal, oval, open, covered externally with incumbent setaceous feathers.

Perigynium less inflated, more conspicuously nerved or even costate, and with more or less setaceous or awned teeth; scale usually awned; spikes mostly nodding or spreading, comose in appearance, greenish, greenish-yellow, or ochroleucous.—Sp.

The leaf-blade is linear-lanceolate, rigid, erect, acuminate with a setaceous tip, nearly smooth, varying in length from 6 to 20 inches and in breadth from 1/6 to 2/3 inch.

Spinous-radiate: beset with spines in a circle, either concatenate, united at their bases, or setaceous, like bristles.