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FOC | Family List | FOC Vol. 23 | Cyperaceae

1. Carex subg. Vigneastra (Tuckerman) Kükenthal, Bot. Jahrb. Syst. 27: 516. 1899.

复序薹草亚属 fu xu tai cao ya shu

Authors: Shuren Zhang, Tetsuo Koyama & Gordon C. Tucker

Carex sect. Vigneastra Tuckerman, Enum. Meth. Caric. 10. 1843; C. subg. Indocarex Baillon ex Kükenthal, nom. illeg. superfl.

Inflorescence simple or compound. Spikes few to numerous, usually bisexual and androgynous, rarely unisexual; cladoprophyll utriculiform, with or without a developed female flower.

About 100 species: tropical and subtropical Asia; 36 species (16 endemic) in ten sections (one endemic) in China.

Key to sections

1 Each cladoprophyll with a developed female flower inside; inflorescence spicate; spikes numerous and densely arranged.   1 C. sect. Japonicae
+ Cladoprophylls without flowers or some with flowers; inflorescence paniculate or racemose, if inflorescence spicate then spikes fewer   (2)
2 (1) Cladoprophyll below terminal spike with a developed female flower inside, others without flower; rachilla present at base of nutlet; inflorescence racemose   (3)
+ Cladoprophylls without flowers; rachilla absent; inflorescence paniculate or spicate   (4)
3 (2) Terminal spike androgynous; utricle with smooth straight beak; nutlets with flat faces.   2 C. sect. Mundae
+ Terminal spike male; utricle with scabrous geniculate beak; nutlets with concave faces.   3 C. sect. Hangzhouenses
4 (2) Inflorescence spicate; spikes fewer, densely arranged in capitate spicate inflorescence.   10 C. sect. Scabrellae
+ Inflorescence paniculate   (5)
5 (4) Spikes unisexual, male ones at upper parts of inflorescence branches, female ones at lower parts.   9 C. sect. Hypolytroides
+ Spikes bisexual, androgynous   (6)
6 (5) Culm lateral; cauline leaves reduced and spathelike; involucral bracts spathelike   (7)
+ Culm central; cauline leaves well developed and leafy; involucral bracts leafy   (8)
7 (6) Radical leaves fasciated, leaf blades elliptic to linear-elliptic.   7 C. sect. Hemiscaposae
+ Several radical leaves forming a high shoot, leaf blades linear.   8 C. sect. Surculosae
8 (6) Leaf blades and involucral bracts elliptic to linear-elliptic, with prominent transverse veins; inflorescence branches with fewer spikes.   6 C. sect. Euprepes
+ Leaf blades and involucral bracts linear, without transverse veins; inflorescence branches bearing numerous spikes, very rarely bearing few spikes   (9)
9 (8) Spikes cylindric, larger, 2-8 cm, with numerous spikelets.   4 C. sect. Polystachyae
+ Spikes oblong, smaller, less than 2 cm, with fewer spikelets.   5 C. sect. Indicae


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