Cyperus filicinus Vahl

Fern flatsedge (en)

Species

Angiosperms > Poales > Cyperaceae > Cyperus

Characteristics

Herbs, annual, cespitose. Culms trigonous, 5–50 cm × 0.4–2 mm, glabrous. Leaves flat, 10–30 cm × 1–3 mm. Inflorescences: heads loosely globose, 10–22 mm diam.; rays 0–6, 1–7 cm; bracts 3–6, horizontal to slightly ascending, flat, 3–26 cm × 1–3 mm. Spikelets 6–20, linear-lanceoloid, compressed, 7–30 × 2–3 mm; floral scales 8–28, stramineous to light reddish brown, laterally ribless, ovate, 2.7–3.6 × 1.6–1.8 mm. Flowers: stamens 2; anthers 0.5 mm, connective apex reddish, subulate, 0.1–0.2 mm; styles 1.9–2.1 mm; stigmas 1–1.3 mm. Achenes brown, oblong, 1.2–1.6 × 0.6–0.9 mm, base cuneate to ± stipelike, apex obtuse, apiculate, surfaces minutely punctate.
More
Tufted annual 1–4 dm; lvs 1–3 mm wide, shorter than the stem; bracts several, to 2.5 dm, 1–3 mm wide; spikes all sessile, or the 1–6 rays to 10 cm; spikelets 5–10, 15–20 × 2.5–3 mm, narrowly lanceolate in outline and acute; scales stramineous, narrowly oblong, 2.5–3.5 mm, acute or obtuse and minutely apiculate; stamens 2; achenes lenticular, obovate-elliptic, 1.2–1.7 mm. Brackish marshes and sandy beaches along the coast; Me. to Fla., La., and the W.I. (C. nuttallii; C. polystachyos, misapplied)
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) -
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses -
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 filicinus world distribution map, present in Åland Islands, Georgia, Malaysia, Nicaragua, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:74683-2
WFO ID wfo-0000373408
COL ID 33C85
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Cyperus torreyanus Cyperus cleaveri Cyperus louisianae Cyperus nuttallii Torreya caespitosa Cyperus filicinus Pycreus cleaveri Cyperus polystachyos var. filicinus Cyperus nuttallii var. minimus Cyperus polystachyos var. cleaveri Cyperus filicinus f. cleaveri Cyperus filicinus f. splendens