Carex unisexualis C.B.Clarke

Species

Angiosperms > Poales > Cyperaceae > Carex

Characteristics

Rhizome long creeping, slender, clothed with brown sheaths disintegrating into fibers. Culms (10-)15-50 cm tall, compressed trigonous, with pale brown sheaths at base. Leaves shorter than culm, blades linear, 1-2.5 mm wide, flat or plicate, apex acuminate. Involucral bracts setaceous or glumelike. Plants dioecious (rarely monoecious); female spicate inflorescence cylindric, 2.5-8 × 0.7-1 cm; male inflorescence rather narrow, 5-6 mm wide; spikes 15-30, unisexual, rarely androgynous; female spikes oblong-ovate, 5-8 × ca. 4 mm wide; male spikes oblong, ca. 6 × 2-3 mm. Female glumes pale green, ovate, 2-3 mm, sparsely ferruginous puncticulate, margins white hyaline, green 1-veined costa excurrent into an awn at acute apex. Utricles greenish or pale, ferruginous dotted, longer than glume, ovate, plano-convex, 2-3 × 1-1.5 mm, membranous, many veined on both faces, base subrounded, spongy, shortly stipitate, upper margins serrulate winged, apex gradually narrowed into a scabrous beak, orifice 2-toothed. Nutlets dark brown, loosely enveloped, ovate or elliptic, plano-convex, ca. 1.2 mm, lustrous, base shortly stipitate, apex rounded; stigmas 2. Fl. and fr. Apr-Jun.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.15 - 0.5
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
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Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
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Hardiness (USDA) -

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
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Germination treatment -
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Optimum temperature (C°) -
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Distribution

Carex unisexualis world distribution map, present in China and Japan

Identifiers

LSID urn:lsid:ipni.org:names:302817-1
WFO ID wfo-0000352269
COL ID 5XCFM
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Carex unisexualis Carex fluviatilis var. unisexualis