Cyperus elegans L.

Royal flatsedge (en)

Species

Angiosperms > Poales > Cyperaceae > Cyperus

Characteristics

Herbs, perennial, cespitose, shortly rhizomatous, coarse, viscous. Culms round to roundly trigonous, 15–80 cm × 2–4 mm, glabrous. Leaves: adaxial face concave, becoming trigonous apically, 15–75 cm × 1–4 mm, margins involute. Inflorescences: spikes ovoid, 10–20 mm wide; rays 3–8(–10), 0.5–12 cm; 2d order rays 0–3, 1–3 cm; bracts 3–7, horizontal to vertical, 2.5–5.5 cm × 1–4 mm, margins involute; 2d order bracts 0–3, 1–3 cm; rachilla persistent, wingless. Spikelets 3–20(–30), beige to greenish or reddish brown, strongly compressed, oblong-ellipsoid to oblong-lanceoloid, 3–15 × 2.5–3.5 mm; floral scales deciduous, 6–22, laterally pale greenish white to stramineous or reddish brown, medially pale green to yellowish green, laterally 2-ribbed, medially 3–5-ribbed, broadly ovate, (2–)2.8–3.6 × 2.4–2.6 mm, apex with slightly excurved mucro 0.2–0.3 mm, apically scabrid. Flowers: anthers 0.6–1.4 mm; styles 1.2–1.5 mm; stigmas 1–1.5(–3) mm. Achenes dark reddish brown to black, stipitate, obovoid, faces concave, flat or subtly convex, (1.4–)1.8–2 × 0.9–1 mm, base cuneate, stipe (sometimes absent) spongy, 0.1–0.2 × 0.2–0.4 mm, apex truncate, apiculate, surfaces coarsely papillose.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.33 - 0.65
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

Ditches, damp pastures, pond shores, riverbanks, coastal dunes; at elevations up to 500 metres.
Light 4-9
Soil humidity 7-9
Soil texture 1-2
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses medicinal
Edible -
Therapeutic use Cold (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
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 elegans unspecified picture

Distribution

Cyperus elegans world distribution map, present in Aruba, Åland Islands, Bahamas, Belize, Bolivia (Plurinational State of), Costa Rica, Cuba, Cayman Islands, Dominica, Ecuador, Honduras, Haiti, Jamaica, Nicaragua, Peru, Puerto Rico, United States of America, and Venezuela (Bolivarian Republic of)

Identifiers

LSID urn:lsid:ipni.org:names:304394-1
WFO ID wfo-0000372528
COL ID 33C5N
BDTFX ID -
INPN ID 446184
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Cyperus elegans Scirpus potosiensis Papyrus elegans

Lower taxons

Cyperus elegans subsp. elegans Cyperus elegans subsp. rubiginosus