Xyris grandiceps Griseb.

Xyris grandiceps Griseb. Cat. PI. Cub. 223. 1866
Xyris mix Griseb. Cat . PI. Cub. 223. 1866.
Tufted, rarely annual; leaves Linear, 40-60 cm. long, 5-7 mm. broad, somewhat obtuse at the apex, smooth; sheath occupying about one half the length of the leaf, dilated, dull-rusty and opaque below; peduncles 50-100 cm. tall, 1.5-2 mm. broad, unicostate or bicostate above, multicostate or multistriate below, smooth, the peduncular sheath 20-30 cm. long; spike obovoid or ellipsoid, 12-22 mm. long, 8-12 mm. thick, the outer barren bracts elliptic, 4-5 mm long, 2-2.5 mm. broad, nearly rounded at the apex, the flowering bracts obovate, about 7 mm. long, 4-5 mm. broad, entire, pale-rusty or tawny, with a grayish-green or dull-purple, ovate or deltoid dorsal area 2.5-3 mm. long; lateral sepals linear, 7-9 mm. long, about 0.5 mm. broad, acute, somewhat falcate above; keel very narrow, dull-purple above, serrate from the middle to the apex or nearly entire; seeds ellipsoid, about 0.5 mm. long.
Type locality: Western Cuba. Distribution: Western Cuba.

Xyris grandiceps là một loài thực vật hạt kín trong họ Hoàng đầu. Loài này được Griseb. miêu tả khoa học đầu tiên năm 1866.