Cyperus orthostachyus Franch. & Sav.

Species

Angiosperms > Poales > Cyperaceae > Cyperus

Characteristics

Annuals. Roots fibrous. Culms slender, 8-65 cm tall, compressed triquetrous, smooth, with few leaves at basal part. Leaves shorter than or equaling culm; sheath brownish, ± long; leaf blade 3-6 mm wide, flat, margin scabrous. Involucral bracts 3 or 4, leaflike, very much longer than inflorescence or basal 1 or 2 longer than inflorescence, margin scabrous. Inflorescence a simple or rarely compound anthela; rays 5-11, mostly to 15(-20) cm, unequal in length, each with 1(-5) spike. Spike ovate-oblong, broadly ovate, or oblong-cylindric, 1-3.5 × 1-3 cm, with 5-32 or many spikelets; rachis white hispidulous on angles. Spikelets slightly laxly or densely arranged, obliquely spreading to suberect, sometimes divergent after anthesis, narrowly ovoid to linear, 0.3-2.5 cm × 1-2 mm, 6-46-flowered; rachilla wings white, narrow, hyaline; successive glumes on rachilla ca. 1 mm apart. Glumes purplish red on both surfaces, slightly lax, broadly ovate to elliptic, 1.4-1.5 mm, membranous, obscurely 5-7-veined, keel abaxially green, margin apically white hyaline, apex rounded to retuse and muticous. Stamens 3; anthers ellipsoid, short; connective prolonged. Style short; stigmas 3, slightly short. Nutlet brown, obovoid, nearly as long as subtending glume, 3-sided, puncticulate, apex mucronate. Fl. and fr. Jul-Oct.
Life form
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.08 - 0.65
Root system fibrous-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 6-11

Usage

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

Cultivation

Mode -
Germination duration (days) 25 - 30
Germination temperacture (C°) 21 - 23
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Cyperus orthostachyus unspecified picture

Distribution

Cyperus orthostachyus world distribution map, present in Chile, China, Japan, Korea (Democratic People's Republic of), and Viet Nam

Identifiers

LSID urn:lsid:ipni.org:names:305399-1
WFO ID wfo-0000378797
COL ID 33D26
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Cyperus orthostachyus Cyperus truncatus Cyperus truncatus Cyperus orthostachyus var. robustus Cyperus orthostachyus var. dahuricus Cyperus truncatus var. robustus

Lower taxons

Cyperus orthostachyus var. orthostachyus