Juncus nodosus L.

Knotted rush (en), Jonc à fleurs obtuses (fr), Jonc à tépales obtus (fr)

Species

Angiosperms > Poales > Juncaceae > Juncus

Characteristics

Herbs, perennial, rhizomatous, 0.4--5.5(--7) dm. Rhizomes with swollen nodes, 1 mm diam. Culms erect, terete, 1--3 mm diam., smooth. Cataphylls 0 or 1--2., pink to gray, apex acute. Leaves: basal 1, cauline 2--4, green to pink; auricles 0.5--1.7 mm, apex rounded, membranaceous to cartilaginous; blade terete, 6--30 cm x 0.5--1.5 mm. Inflorescences terminal racemes of 3--15 heads, 0.6--6 cm, branches ascending to erect; primary bract erect; heads 6--30-flowered, spheric, 6--10(--12) mm diam. Flowers: tepals green to light brown, lance-subulate, 2.4--4.1 mm, nearly equal, apex acuminate; stamens 3 or 6, anthers 1/2 to equal filament length. Capsules exserted, chestnut brown, 1-locular, lance-subulate, 3.2--5 mm, apex tapering, valves separating at dehiscence, fertile throughout or only proximal to middle. Seeds oblong, ellipsoid, or obovoid, 0.4--0.5 mm, not tailed. . 2n = 40.
More
Stems slender, erect, 1.5–4 dm, arising singly from the nodes of slender rhizomes that are evidently tuberous-thickened at intervals; cauline lvs 2 or 3, the blades terete, septate, 0.5–2 dm × 0.7–1.5 mm, sheath-membrane yellowish, prolonged into membranous auricles 0.5–1 mm; heads mostly 2–10(–15) in a loose or congested, proliferating infl, globose, 5–25-fld, mostly 6–9 mm thick; fls eprophyllate; tep acuminate, but broader than in no. 30 [Juncus torreyi Coville], 2.5–3.5 mm, the pet about as long as the sep; stamens 6; fr slender, sharply triquetrous, 3.5–4.5 mm, equaling or commonly surpassing the tep, tapering into a slender, only tardily dehiscent stylar beak, unilocular, the placental partitions only slightly intruded; seeds apiculate, ca 0.5 mm; 2n=40. Bogs, marshes, and wet shores; Nf. to Mack. and B.C., s. to Va., Ind., Mo., Tex., and Calif.
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
Root system rhizome
Rooting depth (meter) 0.5
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 7-8
Soil humidity 5-6
Soil texture 1-2
Soil acidity 1-7
Soil nutriment -
Hardiness (USDA) 4-9

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 nodosus unspecified picture

Distribution

Juncus nodosus world distribution map, present in Canada, Mexico, and United States of America

Conservation status

Juncus nodosus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:443278-1
WFO ID wfo-0000776969
COL ID 3QTYS
BDTFX ID 36631
INPN ID 104280
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Juncus nodosus Juncus rostkovii Tristemon fulvus Juncus nodosus f. intermedius Juncus nodosus var. meridianus Juncus nodosus var. proliferus Juncus nodosus var. genuinus Juncus nodosus var. vulgaris