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Pycreus unioloides Urb.

Species

Angiosperms > Poales > Cyperaceae > Pycreus

Characteristics

Perennials. Rhizomes short. Culms tufted, 40-90 cm tall, slender, stiff, 3-angled, smooth, with a few leaves basally. Leaves shorter than culm; sheath reddish brown, to 8 cm; leaf blade 3-4 mm wide, folded or flat, somewhat rigid. Involucral bracts 2-4, leaflike, basal 1 or 2 longer than inflorescence. Inflorescence a simple anthela; rays 2-6, mostly to 6 cm, sometimes short, each with 3-12 spikelets arranged into a spike. Spikelets narrowly oblong-ovoid, narrowly ovoid, or oblong-ovoid, 0.6-1.8 cm × 3-5 mm, compressed, spreading to downward reflexed at basal part at maturity, (6-)10-22-flowered; rachilla flexuose, wingless. Glumes straw-colored, yellowish brown, or sometimes slightly reddish brown on both surfaces, slightly densely to slightly laxly imbricate, ovate, 4-5 mm, subleathery, veins 3 and green, apex acute. Stamens 3; anthers linear; connective prominent beyond anthers. Style long; stigmas 2, slightly shorter than style. Nutlet yellowish when young but black when mature, broadly obovoid to globose-obovoid, 1/4-1/3 as long as subtending glume, compressed biconvex, densely prominently puncticulate. Fl. and fr. Jun-Oct.
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Perennial herb, tufted, 0.35-0.70 m high. Leaf blades 2-6 mm wide. Culm scapose, sharply 3-angled, 0.8-1.8 mm in diam. Inflorescence head-like, of 3-10 sessile or subsessile spikelets, often with 1-few shortly or long-stalked clusters of 4-10 spicately arranged spikelets added. Subtending bracts 3, lowest 75-250 mm long, leaf-like, largest 80-350 mm long. Spikelets compressed, ovate, 8-17 x 4-5 mm. Glumes broadly lanceolate, 3-4 mm long, keel non-excurrent or excurrent into minute blunt point. Flowering time Dec.-Feb. Nutlet broadly obovate, 0.8-1.0 x 0.7-0.8 mm, biconvex, dark reddish brown, surface minutely reticulate, cells slightly elongated lengthwise.
Perennial herb, up to 400 mm tall. Plants tufted. Base of plant often reddish. Rhizome creeping. Nut usually flattened, black. Glumes yellowish brown.
An inflorescence of large golden spikelets
Erect plant, woody at the base
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.4 - 0.7
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Swamps or moist places in savanna.
Light 4-9
Soil humidity 6-8
Soil texture 1-2
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

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

Cultivation

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

Distribution

Pycreus unioloides world distribution map, present in China, Thailand, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:214836-2
WFO ID wfo-0000507652
COL ID 78QLY
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Pycreus angulatus Pycreus unioloides Cyperus lanceus Pycreus angulatus Cyperus unioloides var. compositus Cyperus unioloides var. fissivaginatus Cyperus unioloides var. wightii Pycreus angulatus var. wightii Cyperus angulatus Cyperus unioloides f. reductus
WorldFloraDB 2024