Eleocharis rostellata (Torr.) Torr.

Beaked spikerush (en)

Species

Angiosperms > Poales > Cyperaceae > Eleocharis

Characteristics

Plants densely tufted, mat-forming by means of rooting culm tips. Culms 1.5–3 times as wide as thick, 20–100 cm × 0.35–2 mm, firm to hard, wiry, with to 8 subacute ribs, rarely nearly smooth; some culms arching or decumbent and rooting at tips. Leaves: distal leaf sheaths not splitting abaxially, proximally dark red to brown, apex usually reddish. Spikelets ovoid, 5–17 × 2.5–5 mm, apex acute; spikelets on stolons rudimentary, non-flowering, proliferous when rooting; proximal scale empty, amplexicaulous, ovate, 2–4 mm; subproximal scale with flower; floral scales 20–40, 2–3 per mm of rachilla, stramineous to medium brown, midrib region paler, ovate, 3.5–6 × 2–3 mm, membranous to cartilaginous, apex entire, rounded to subacute. Flowers: perianth bristles brown, equaling achene or tubercle, densely spinulose; anthers brown, 2–2.4 mm. Achenes often very variable within one plant, ovoid to obovoid or obpyriform, 1.5–2.5 × 1–1.2 mm, beak to 1 × 0.6 mm. Tubercles when present pale to dark brown, pyramidal, to 0.5 × 0.3 mm.
More
Cespitose perennial; stems (2–)4–10+ dm, ± flattened at least distally and 1–2 mm wide, generally some much elongate, recurved to the ground, and rooting; spikelet fusiform, (5–)8–13 mm, with (5–)10–20(–25) fls; scales equaling or surpassing the achene, firm, ovate, obtuse or the upper acute, scarious-margined, the lowest one empty; bristles ca equal to achene, retrorse-serrate; style trifid; achene light greenish to brown, rounded-trigonous to planoconvex, smooth or slightly cellular-roughened, 1.9–2.8 mm including the prominent, pale tubercle, this up to 0.75 mm and confluent with the body. Saline or calcareous swamps and marshes along the coast from N.S. to Fla. and locally inland to Ill., Mich., Wis., and Minn.; widespread in w. U.S. and trop. Amer.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.9
Root system fibrous-root
Rooting depth (meter) 0.3
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-8
Soil humidity 8-9
Soil texture -
Soil acidity 5-8
Soil nutriment -
Hardiness (USDA) 4-10

Usage

Uses medicinal
Edible -
Therapeutic use Ceremonial Medicine (unspecified), Emetic (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by cuttings or seedlings.
Mode cuttings seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Eleocharis rostellata unspecified picture

Distribution

Eleocharis rostellata world distribution map, present in Åland Islands, Bermuda, Canada, Colombia, Cuba, Cayman Islands, Micronesia (Federated States of), Guatemala, Haiti, Malaysia, Nicaragua, Puerto Rico, and United States of America

Conservation status

Eleocharis rostellata threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:307079-1
WFO ID wfo-0000405929
COL ID 397M4
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Eleocharis rostellata Trichophyllum rostellatum Scirpus rostellatus Trichophyllum rostellatum Eleocharis rostellata f. occidentalis Eleocharis rostellata var. congdonii Eleocharis rostellata var. occidentalis