Juncus tenuis var. williamsii Fern.
IUCN
NCBI
EOL Text
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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| Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
| Source | http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=222000181 |
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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| Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
| Source | http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=222000181 |
Riversides, streamsides, wet grasslands; ca. 400 m.
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| Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
| Source | http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=222000181 |
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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| Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
| Source | http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=222000181 |
Foodplant / saprobe
apothecium of Belonopsis junciseda is saprobic on dead Juncus tenuis
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| Rights holder/Author | BioImages, BioImages - the Virtual Fieldguide (UK) |
| Source | http://www.bioimages.org.uk/html/Juncus_tenuis.htm |
The following is a representative barcode sequence, the centroid of all available sequences for this species.
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.
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| Rights holder/Author | C. Michael Hogan, C. Michael Hogan |
| Source | No source database. |
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 5
Specimens with Barcodes: 11
Species With Barcodes: 1
The Path Rush is one of the more common Juncus spp., but it is rather small in size and inconspicuous. Many different forms of the Path Rush have been described that freely intergrade. Other similar rushes include Juncus interior (Inland Rush) and Juncus dudleyi (Dudley's Rush), although these latter two species are usually larger in size. These rushes can be distinguished by examining the apex of their basal sheaths. The Path Rush has an auriculate sheath with a pair of lanceolate extensions that are membranous and fragile. The sheath of the Inland Rush has a pair of short auricles that are soft and rounded, while the sheath of Dudley's Rush has a pair of short auricles that are hard (cartilaginous) and rounded.
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| Rights holder/Author | Copyright © 2002-2014 by Dr. John Hilty |
| Source | http://www.illinoiswildflowers.info/grasses/plants/path_rush.htm |
Canada
Rounded National Status Rank: N5 - Secure
United States
Rounded National Status Rank: N5 - Secure
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| Rights holder/Author | NatureServe |
| Source | http://explorer.natureserve.org/servlet/NatureServe?searchName=Juncus+tenuis |