Juncus megacephalus M.A.Curtis

Bighead rush (en)

Species

Angiosperms > Poales > Juncaceae > Juncus

Characteristics

Herbs, perennial, rhizomatous, 3--11 dm. Rhizomes 3--4 diam. Culms erect, terete, 3--4 mm diam., smooth. Cataphylls 1--2, purple, apex acute. Leaves: basal 0--1, cauline 2--3; auricles 0.5--2 mm, apex acute, membranaceous; blade terete, 0--24 cm x 0.5--1.7 mm, most distal cauline leaf blade 0--2 cm, shorter than sheath. Inflorescences panicles of (1--)3--21 heads, 1--8 cm, branches erect to spreading; primary bract erect; heads 40--60-flowered, spheric, 8--12 mm diam. Flowers: tepals straw-colored to reddish brown, lanceolate-subulate; outer tepals 2.9--4.1 mm, apex acuminate; inner tepals 2.2--3.7 mm, apex acuminate; stamens 3, anthers 1/4--1/2 filament length. Capsules exserted, , straw-colorerd, 1-locular, subulate, 2.5--4.2 mm, apex tapering to subulate beak, valves not separat ing at dehiscence, fertile throughout or only proximal to middle. Seeds ellipsoid to ovoid, 0.4 mm, not tailed; body clear yellow-brown.
More
Much like no. 32 [Juncus scirpoides Lam.], but stouter, with thicker lvs; blade of the uppermost cauline lf shorter than its sheath, usually nonseptate, seldom over 2 cm, or sometimes lacking; heads 10–15 mm thick; tep soft, deep reddish-brown, 3.5–4.5 mm, the pet slightly shorter than the sep; anthers included. Wet, often sandy soil on the coastal plain; se. Va. to Fla. and Miss.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.6 - 1.0
Root system rhizome
Rooting depth (meter) 0.3
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 2-3
Soil humidity 7-8
Soil texture 1-2
Soil acidity 2-6
Soil nutriment -
Hardiness (USDA) 4-10

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

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

Distribution

Juncus megacephalus world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:443194-1
WFO ID wfo-0000776874
COL ID 3QTWN
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Juncus megacephalus