细长喙薹草 xi chang hui tai cao

Carex chuniana F. T. Wang & Tang; C. hainanensis Merrill ex Chun & F. C. How; C. humbertii F. T. Wang & Tang (1949), not Chermezon (1926); C. hypolytrifolia T. Koyama; C. spatiosa Boott.

Rhizome thick. Culms tufted, erect and robust, 30-100 × 0.3-0.5 cm, trigonous, smooth. Leaves basal and cauline, linear, 2-2.5 cm wide, glabrous or slightly scabrid; persistent sheaths brown, fibriform. Involucral bracts leafy, longer than inflorescence, long sheathed. Panicle simple or compound, 25-30 cm, 1-5-branched; inflorescence branches single, ovate-triangular, 4-10 × 2-6 cm, sometimes binate; peduncles of inflorescence branches rigid, upper part hairy, trigonous, lowest one 10-20 cm, upper ones gradually shorter; inflorescence axes trigonous, hairy on edges; bractlets glumelike, 1-1.5 mm, hairy abaxially, with awns 2-5 mm. Spikes numerous, bisexual, androgynous, arising from abaxially hairy cladoprophylls, 7-18 mm; male part of spike suboblong, 6-7 × 2-3 mm, usually longer than or sometimes as long as female part; female part elliptic, many flowered; male glumes pale yellow or pale brown, narrowly lanceolate, 6-7 mm, membranous, hairy abaxially, apex shortly awned; female glumes pale yellowish white, pale greenish white, or pale brown, lanceolate, 4.5-5.5 mm, membranous, hairy abaxially, midrib extending into scabrid awn, apex acuminate or emarginate. Utricles pale brown or pale green, shorter than glumes, subrhomboid, bluntly trigonous, 5.5-10 mm, hairy, many veined, base stipitate, apex elongate into beak, beak to 2/3 length of utricle, orifice obliquely truncate. Nutlets brown at maturity, elliptic, trigonous, 3-3.5 mm; style base slightly thickened; stigmas 3.

Forests, forest margins; 600-1300 m. Hainan [Indonesia, Malaysia, Myanmar, Thailand, Vietnam].