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Juncus debilis A.Gray

Weak rush (en)

Species

Angiosperms > Poales > Juncaceae > Juncus

Characteristics

Herbs, perennial, cespitose, 1--2.5 dm. Culms erect, terete, 1--2 mm diam., smooth. Cataphylls 0--1, maroon or dark green, apex acute. Leaves: basal 0--1, cauline 1--3; auricles 1--1.5 mm, apex rounded, scarious; blade maroon or dark green, terete, 1--12.5 cm x 0.5--1.5 mm. Inflorescences terminal panicles of 3--50 heads, 2--8 cm, branches ascending to spreading; primary bract erect; heads 2--10-flowered, obpyramidal, 2--5 mm diam. Flowers: tepals green to straw-colored, lanceolate, 1.8--2.3(--2.5) mm, apex sharply acuminate; stamens 3, 1/2 filament length. Capsules exserted, straw-colored, 1-locular, narrowly ellipsoid to lanceoloid, 2.8--3.7 7(--4.2) mm, apex acute, valves separating at dehiscence. Seeds ellipsoid, 0.3--0.4 mm, not tailed; body clear yellow-brown.
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Stems cespitose, very slender, erect, 1–4 dm; lvs terete, septate, 0.5–1 mm thick; infl loosely and divaricately branched, a third to half the height of the plant, with 5–50 obpyramidal, 2–5(–10)-fld heads 3–6 mm thick; fls eprophyllate; tep linear-subulate, subequal, 1.2–2.8 mm, very narrowly scarious-margined; stamens 3; fr unilocular, pale cinnamon-brown, ellipsoid-trigonous or narrowly ovoid-trigonous, acute, 2.8–4.2 mm, distinctly surpassing the tep. Moist sandy soil; R.I. to Mo., s. 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) 0.1 - 0.25
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 4-9
Soil humidity 5-7
Soil texture 1-2
Soil acidity 1-5
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 -

Images

Juncus debilis unspecified picture

Distribution

Juncus debilis world distribution map, present in Honduras, Mexico, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:132094-2
WFO ID wfo-0000776284
COL ID 3QTMF
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Juncus debilis Juncus acuminatus var. debilis Juncus polycephalus var. depauperatus Juncus radicans
WorldFloraDB 2024