Associations
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anglais
)
fourni par BioImages, the virtual fieldguide, UK
Foodplant / saprobe
apothecium of Belonopsis junciseda is saprobic on dead Juncus tenuis
Comments
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anglais
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fourni par eFloras
Juncus tenuis occurs throughout North America. It is particularly abundant in northeastern United States and eastern Canada, although infrequent in the south and west.
Through the use of isozyme electrophoresis, hybridization can be demonstrated between various members of the Juncus tenuis complex, including Juncus tenuis, J. anthelatus, J. interior, J. secundus, and J. dichotomus (R. E. Brooks, unpubl.). Juncus ××oronensis is thought to be a hybrid between J. tenuis and J. vaseyi in the northeast.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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anglais
)
fourni par eFloras
Herbs, perennial, tufted, 1.5--5 dm. Rhizomes densely branching. Culms few--20. Leaves basal, (1--)2--3; auricles 2--5 mm, apex acute, membranous; blade flat, 3--12 cm x 0.5--1 mm, margins entire. Inflorescences 5--40-flowered, borne congested or branch internodes ca. as long as tepals, ssomewhat loose, 1--5 cm; primary bract usually longer than inflorescence. Flowers: bracteoles 2; tepals greenish, lanceolate, 3.3--4.4 mm; outer and inner series nearly equal; stamens 6, filaments 0.5--0.9 mm, anthers 0.1--0.2 mm; style 0.1--0.2 mm. Capsules tan or light brown, 1-locular to pseudo-3-locular, ellipsoid, (3.3--)3.8--4.7 x (1.1--)1.3--1.7 mm, nearly equal to tepals. Seeds tan, ellipsoid to lunate, (0.52--)5.5--0.65(--0.7) mm, not tailed. 2n = 80.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
(
anglais
)
fourni par eFloras
Plants perennial, tufted. Stems 10--40 cm ( 0.6--1.2 mm, rigid to weak. Leaves basal; leaf sheath auricles obtuse, 2--4 mm, margin scarious to broadly so; leaf blade flat, 4--23 cm ( 0.5--1.8 mm, margin often involute. Inflorescences terminal panicles, 3--7 cm, usually lax, 6--40-flowered, rarely flowers in a few clusters; involucral bracts 2, leaflike, 4--18 cm. Bracteoles 2. Perianth segments greenish, lanceolate, 3.5--4 ( ca. 1 mm, subequal or outer ones somewhat longer than inner, margin white scarious, apex long tapered to a sharp point. Stamens 6; filaments ca. 1.2 mm; anthers ca. 0.8 mm. Style shorter than ovary; stigmas ca. 1.6 mm. Capsule trigonous ovoid, shorter than to rarely equaling perianth, apex truncate and shortly mucronate to obtuse. Seeds reddish brown, 0.4--0.5 mm, appendaged; appendage white, short. Fl. Jun--Jul, fr. Aug--Sep. 2 n = 30, 32, 84.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Distribution
(
anglais
)
fourni par eFloras
Heilongjiang, Henan, Jiangxi, Shandong, Taiwan, Zhejiang [India, Japan, Korea; Europe, North America].
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Habitat
(
anglais
)
fourni par eFloras
Riversides, streamsides, wet grasslands; ca. 400 m.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Habitat & Distribution
(
anglais
)
fourni par eFloras
Flowering spring--early summer. Exposed or shaded sites in soils ranging from sandy to clayey under moist or drier conditions, oftentimes these sites naturally or otherwise disturbed (e.g., game or human trails); Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask.; Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; introduced worldwide.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
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anglais
)
fourni par eFloras
Juncus bicornis Michaux; J. bicornis var. williamsii (Fernald) Victorin; J. macer Gray; J. macer forma williamsii (Fernald) F. J. Hermann; J. macer var. williamsii (Fernald) Fernald; J. tenuis var. bicornis (Michaux) E. Meyer; J. tenuis var. multicornis E. Meyer; J. tenuis var. williamsii Fernald
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
(
anglais
)
fourni par eFloras
Juncus leptocladus Hayata; J. macer Gray.
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Brief Summary
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anglais
)
fourni par EOL authors
Juncus tenuis is a cosmopolitan rush species that has a broad, almost worldwide presence; for example, in North America it occurs in all fifty states of the USA and all Canadian provinces save for Nunavit and Yukon. Also known by the common name of Path rush, it is present along many man-made as well as animal runway paths, since the sticky seeds are often dispersed by clinging to mammals.
This perennial herb grows in tufts that reach up to 40 centimeters in height. Flowers present in the form of terminal panicles. The flowering season is typically June and July.
In general Path rush appears to prefer disturbed habitats, which may explain its broad distribution; Besides path verges, it is found in open woodlands, gravelly seeps, pastures, abandoned fields and other barren waste areas. It is also tolerant of a wide range of soil types, and is much more adapted to compacted soils than most plants.
Juncus tenuis
(
anglais
)
fourni par wikipedia EN
Juncus tenuis, the slender rush, is a clump-forming, round-stemmed perennial in the Juncaceae (rush family). Slender rush grows to be between 15 and 60 cm tall. Generally considered a weed, it is rarely sold by retailers as a household container plant. Where it is introduced, it is colloquially called path rush, field rush, slender yard rush, poverty rush or wiregrass.
The leaves of the plant all come from the base and are not nearly as tall as the stems. The stems are partly covered by sheaths, and have the most distinctive characteristic of the plant on them: clusters or cymes at the top. These cymes consist of branches that have small egg-shaped seed capsules at the end of them. The seeds split into three parts when they become ripe. The plant also spreads via rhizomatous root growth.
Habitat
Slender rush grows in landscapes, crops, roadsides, and all types of fields. It can grow on both wet and dry sites, in soils consisting mainly of sand or clay. Because of its high tolerance of compacted soils, it can outcompete other plant species in such places, hence the name "path rush". It is native throughout all fifty states of United States, most of Canada, and parts of northern Europe.
References
- Richard H. Uva, Joseph C. Neal and Joseph M. Ditomaso, Weeds of The Northeast, (Ithaca, NY: Cornell University Press, 1997), pp. 28–29.
- USDA | NRCS, Plants Profile for Juncus tenuis
- Missouri Botanical Garden, Juncus tenuis
- Dr. John Hilty, Path Rush
- Niche Gardens, Juncus tenuis
- eFloras, Path rush
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- Wikipedia authors and editors
Juncus tenuis: Brief Summary
(
anglais
)
fourni par wikipedia EN
Juncus tenuis, the slender rush, is a clump-forming, round-stemmed perennial in the Juncaceae (rush family). Slender rush grows to be between 15 and 60 cm tall. Generally considered a weed, it is rarely sold by retailers as a household container plant. Where it is introduced, it is colloquially called path rush, field rush, slender yard rush, poverty rush or wiregrass.
The leaves of the plant all come from the base and are not nearly as tall as the stems. The stems are partly covered by sheaths, and have the most distinctive characteristic of the plant on them: clusters or cymes at the top. These cymes consist of branches that have small egg-shaped seed capsules at the end of them. The seeds split into three parts when they become ripe. The plant also spreads via rhizomatous root growth.
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- cc-by-sa-3.0
- droit d’auteur
- Wikipedia authors and editors
