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FOC | Family List | FOC Vol. 23 | Cyperaceae

28. CAREX sect. CHLOROSTACHYAE Meinshausen, Trudy Imp. S.-Peterburgsk. Bot. Sada. 18: 283, 360. 1901.

绿穗薹草组 lü sui tai cao zu

Authors: Lun-Kai Dai & Tetsuo Koyama

Rhizomes short, rarely stoloniferous. Culms slender. Leaves narrow. Involucral bract leaf-shaped, sheathed. Spikes few, 1 per involucral bract sheath; terminal spike male or bisexual, sometimes with few female flowers at base or apex; lateral spikes female, rarely bisexual, usually pendulous, loosely or subdensely few to 10-flowered or over 10-flowered; peduncles slender (upper slightly short). Female glumes obtuse to rounded at apex, rarely aristate or mucronate, early deciduous. Utricles obtusely trigonous or swollen trigonous, membranous, obscurely veined, rarely 2-veined laterally, beak short, rarely slightly long, scabrous on both margins, truncate or emarginate at orifice. Stigmas 3.

About ten species: N Africa, Asia, Europe, North America; seven species (one endemic) in China.

1 Rhizome stoloniferous; spikes androgynous, loosely few flowered, sometimes lateral spikes female; female glumes slightly longer or shorter than utricle, aristate at apex.   225 C. handelii
+ Rhizome without stolons; terminal spike male, sometimes with few female flowers at apex or base, lateral spikes female; female glumes shorter than utricle   (2)
2 (1) Utricles greenish or yellowish green at maturity, not nitid; terminal spike male, sometimes with female flowers at apex or base   (3)
+ Utricles wholly or partly yellow-brown at maturity, nitid; terminal spike male (sometimes with few female flowers in C. capillaris)   (5)
3 (2) Leaves sulcate on upper face; terminal spike androgynous, lateral spike loosely 3-7-flowered.   226 C. sedakowii
+ Leaves flat, not sulcate; terminal spike male or sometimes with few flowers at apex, lateral spike rather densely many flowered   (4)
4 (3) Utricles obovate or suborbicular, 1.5-2 mm, with very short beak or nearly beakless; terminal spike gynaecandrous or male.   227 C. karoi
+ Utricles oblong-lanceolate, 3-4.5 mm, stipitate, with rather long beak; terminal spike male.   228 C. tenuiformis
5 (2) Utricles ovate or narrowly ovate, 3.5-4 mm, gradually attenuate to a slightly long beak at apex.   229 C. capillaris
+ Utricles ovate or obovate-fusiform, ca. 3 mm, abruptly contracted to a rather short or very short beak at apex   (6)
6 (5) Terminal male spike oblong-lanceolate, not surpassing uppermost female spike; utricles obtusely trigonous, rather swollen, brown at maturity, abruptly contracted to a very short beak at apex.   230 C. chlorostachys
+ Terminal male spike oblanceolate or clavate, surpassing uppermost female spike; utricles obtusely trigonous, not swollen, yellowish brown, abruptly contracted to a short beak at apex.   231 C. ledebouriana

Lower Taxa


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