Cyperus croceus Vahl

Baldwin's flatsedge (en)

Species

Angiosperms > Poales > Cyperaceae > Cyperus

Characteristics

Herbs perennial, cespitose. Culms trigonous, (4–)14–45 cm × 1–2 mm, glabrous. Leaves yellow-green, flat, 18–44 cm × 3–4.5 mm. Inflorescences: spikes densely to loosely globose to ovoid, 10–20 mm wide; rays (3–)5–9(–14), 1–15(–26) cm; rachis 3–6(–9) mm; bracts (4–)6–9(–11), horizontal to ascending at 45°, flat, 1–30 cm × 0.5–4 mm; rachilla deciduous, wings persistent, 0.3–0.5(–0.8) mm wide. Spikelets (10–)30–50, oblong to lanceoloid, quadrangular to subterete, compressed, 4–8 × 1–1.3 mm; distal spikelet spreading or ascending; floral scales persistent, (1–)2–4(–6), appressed, whitish with red speckles, laterally 2–4-ribbed, ovate, 2.3–3.6 × 1.8–2.2 mm. Flowers: anthers 0.5 mm; styles 0.6–1.3 mm; stigmas 1.2–2.6 mm. Achenes reddish brown to nearly black, sessile, oblong, ellipsoid, 2–2.4 × 0.4–0.5(–0.7) mm, apex ± truncate-emarginate, apiculate, surfaces puncticulate.
More
Tufted perennial 2–6 dm; stems smooth, scarcely thickened at base; lvs flat, soft, 3–6 mm wide; bracts 4–10, the longest surpassing the infl; rays 3–8, to 10 cm; spikes subglobose, 8–15 mm; spikelets 3–6-fld, to 10 mm, radiating in all directions from the short axis, deciduous at maturity; scales ovate, acute, 2.5–3 × 1–1.5 mm, multinerved; rachilla broadly winged; achenes trigonous, 1.3–1.7 mm, half as thick. Dry soil; trop. Amer., n. mostly on the coastal plain to N.J. and in the interior to Mo. (C. echinatus and C. globulosus, both misapplied)
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.15 - 0.45
Root system fibrous-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 4-9
Soil humidity 7-9
Soil texture 1-2
Soil acidity -
Soil nutriment -
Hardiness (USDA) 5-12

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 -

Distribution

Cyperus croceus world distribution map, present in Åland Islands, Bahamas, Bermuda, Costa Rica, Cuba, Spain, Georgia, Guatemala, Guyana, Honduras, Haiti, Jamaica, Nicaragua, Panama, Peru, Puerto Rico, Suriname, United States of America, and Venezuela (Bolivarian Republic of)

Conservation status

Cyperus croceus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:304222-1
WFO ID wfo-0000370601
COL ID 33BYR
BDTFX ID -
INPN ID 731775
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Cyperus croceus Cyperus multiflorus Dichostylis baldwinii Cyperus baldwinii Cyperus cyclostachyus Cyperus echinatus var. multiflorus Cyperus globulosus var. multiflorus Cyperus globulosus var. pseudofiliculmis