Carex humboldtiana Steud.

Carex humboldtiana Steud. Syn. Cyp. 208. 1855
"Carex Wahlenbergiana Boott" Bock. Vidensk. Meddel. 1869: 157. 1870. (Type from Brazil.) Carex Regneiliana Bock. Cyp. Nov. 2: 34. 1890. (Type from Caldas, Minas Geraes. Brazil.) Carex cladostachya f. polystachya "Wahl." C. B. Clarke; Lindm. Bih. Sv. Vet.-Akad. Handl. 26(3)»:
36. 1900. (As to specimen from Caldas, Brazil, only.) "Carex polystachya Sw." Kiikenth. in Engler, PfJanzenreich 4'°: 267. 1909. Carex macrosperma Mackenzie, Bull. Torrey Club 36: 477. 1909. (Type from Sierra de San Felipe,
Oaxaca.)
Cespitose, from short, thick, woody rootstocks, the culms rather slender but erect, 6-10 dm. high, leafy below, obtusely triangular, smooth or nearly so, exceeding the leaves, phyllopodic, strongly fibrillose and brownish-tinged at base; leaves with well-developed blades 7-15 to a fertile culm, the lower bunched above the base, the blades 1-4 dm. long, 2.5-6 mm. wide, flat with revolute margins, coriaceous, stiff, light-green, attenuate, verscabrous above, the midrib prominent below, the sheaths tight, little hyaline ventrally, concave and narrowly purplish-brown-tinged and slightly prolonged upward beyond base of blade and short-pubescent at mouth, the ligule very short; spikes numerous, androgynous, in 6-10 erect peduncled panicles, the lower panicle distant, solitary, on a slender scabrous peduncle, 6-12 cm. long, the upper panicles in pairs, shorter-peduncled, the uppermost approximate, the paniclebracts leaflet-like, strongly sheathing; panicles ovoid, 2.5-5 cm. long, 1.5-2 cm. wide, containing 8-15 sessile and often somewhat compound, widely spreading spikes, the rhachis hispid; spikes 5-10 mm. long with 2-5 ascending perigvnia in the middle and about as many staminate flowers at apex, the lower scales usually empty, the staminate part much narrower than the pistillate, the bracts small, awn-pointed, 2-5 mm. long; cladoprophyllum prominent, perigynium-like ; scales ovate or obovate, short-awned to obtuse, chestnut-brown or reddishbrown with lighter center and narrow hyaline margins, raany-striate, the midvein prominent, the pistillate 3-4.5 mm. long, about half to tw-o thirds the length of the mature perigynia; perigynia elliptic-obovoid, sharply triangular, 4.5-5 mm. long, 1.9 mm. wide, not at all inflated, membranaceous, smooth, puncticulate, bright-green, soon brownish-tinged, obscurely few-nerved except for the two prominent lateral nerves, short-stipitate, tapering to a stout spongy base, abruptly contracted above into a somewhat roughened and often bent beak 1-1.5 mm. long, one third to one half the length of the body, the orifice hyaline, somewhat obliquely cut, at length bidentate; achenes elliptic-ovoid, triangular with concave sides and blunt angles, very closely enveloped, brownish-black, granular, short-stipitate, 3 mm. long, 1.5 mm. wide, short-apicidate, jointed with the very short, thick, whitish style; stigmas three, slender, reddish-brown.
Type locality: "Specm. Humboldtianum ex N. Granata."
Distribution: Dry woodlands in the mountains, southern Mexico to Central Brazil. (Specimens examined from Oaxaca, Nicaragua. Panama.)

Carex humboldtiana is a tussock-forming species of perennial sedge in the family Cyperaceae. It is native to parts of Central America and South America.

Carex humboldtiana adalah spesies tumbuhan seperti rumput yang tergolong ke dalam famili Cyperaceae. Spesies ini juga merupakan bagian dari ordo Poales. Spesies Carex humboldtiana sendiri merupakan bagian dari genus Carex. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Steud..

Carex humboldtiana là một loài thực vật có hoa trong họ Cói. Loài này được Steud. mô tả khoa học đầu tiên năm 1855.