Rhynchospora filifolia A.Gray

Threadleaf beaksedge (en)

Species

Angiosperms > Poales > Cyperaceae > Rhynchospora

Characteristics

Plants perennial, cespitose, 30–80(–100) cm; rhizomes absent. Culms erect or excurved, mostly filiform, leafy proximal to midculm, obtuse-angled to subterete, wiry. Leaves overtopped by culm; blades narrowly linear, proximally flat, 1–2 mm wide, distally tapering-triquetrous. Inflorescences: spikelet clusters 2–3(–4), distant, narrowly turbinate to hemispheric, mostly shorter than subtending setaceous bract. Spikelets red-brown, lanceoloid, 2.5–3(–4) mm, apex acuminate; fertile scale elliptic, 2–2.5 mm, acute, midrib excurrent as cusp or aristula. Flowers: bristles 6, reaching tubercle tip or beyond, antrorsely barbellate, base setose. Fruits 2–4 per spikelet, 1.5–1.7 mm, on setose pedicellar joint 0.2 mm, body with faces red-brown with pale glassy center, decurrent tubercle base; surfaces smooth; turbercle concavely triangular, 0.4–0.6 mm, setulose-ciliate.
More
Densely cespitose, to 7 dm; lvs filiform or rarely to 2 mm wide; glomerules 2–4, broadly turbinate to hemispheric, the terminal one 8–15 mm thick, the lateral remote, subsessile to short-peduncled, somewhat surpassed by their bracts; spikelets 3–4 mm, dark brown, with 3–6 fls and 1–4 frs; bristles 6, 1.2–1.7 mm, antrorsely barbellate; achenes obovate, 0.9–1.3 mm, two-thirds as wide, pale brown toward the margin, lustrous and nearly white at the center; tubercle deltoid, half as long as the achene. Pine-barren bogs on the coastal plain; N.J. to Fla. and Tex.; Cuba and C. Amer.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3 - 0.8
Root system rhizome
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) 5-11

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

Rhynchospora filifolia world distribution map, present in Åland Islands, Belize, Cuba, Georgia, Honduras, Nicaragua, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:220362-2
WFO ID wfo-0000516538
COL ID 4ST46
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Rhynchospora filifolia Phaeocephalum filifolium Phaeocephalum fuscoides Rhynchospora fuscoides