Comments
provided by eFloras
A very polymorphic species, probably affected by the habitat and salinity. However, the following subspecies and varieties are recognized for the area.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
provided by eFloras
Perennial, laxly caespitose herb, 1040 cm tall, with upto 4 basal leaves and 1-2 cauline leaves; leaves 5-25 cm x 1-2 mm, green to glaucous-green, channelled. Flowering heads on a lax, branched inflorescence; subtending bracts longer than the flowering head. Flowers 2-3 mm long. Perianth segments ovate to ovate-lanceolate, obtuse to acute. Stamens 6, shorter than the perianth segments; anthers upto c. 1 mm long. Style shorter than the stigma. Capsules obovoid - subspherical, rounded or subtrigonous, about as long as or exceeding the perianth, mucronate; seeds c. 0.5 mm long, ovoid, suboblique, striated. 2n=44
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
provided by eFloras
Herbs, perennial, to 8 dm. Rhizomes short- creeping or densely branching, if densely branching herb appearing cespitose. Cataphylls 1--3. Leaves basal and cauline, 1--2; auricles 0.3--0.5 mm, scarious to membranous; blade flat to slightly channeled, 5--35 cm x 0.8--2 mm, margins entire. Inflorescences 5--60-flowered, lax, loose to moderately congested, 1.5--8 cm; primary bract usually exceeding inflorescence. Flowers: bracteoles 2; tepals brownish, ovate to oblong, 1.7--2.7 mm; inner and outer series nearly equal, apex obtuse; stamens 6, filaments 0.5--0.7 mm, anthers 0.6--1 mm; style 0.3 mm. Capsules brown or darker, pseudo-3-locular, widely ellipsoid to obovoid, 2.5--3.5 x 1.4--1.8 mm, exceeding tepals. Seeds light brown, ellipsoid to lunate, 0.35--0.556 mm, not tailed. 2n = 44.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Distribution
provided by eFloras
introduced; Man., Nfld. and Labr. (Nfld.), N.S., Ont., Que.; Colo., Maine, Md., Mich., Minn., Mont., Nebr., N.Y., N.Dak., Utah, Wis., Wyo.; Europe; w Asia.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Flowering/Fruiting
provided by eFloras
Flowering and fruiting late spring--early summer.
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Habitat
provided by eFloras
Disturbed ground, especially ditches, along railroads and banks of canals and roadsides; frequently in saline or alkaline soils; 1500--2100m.
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Synonym
provided by eFloras
Juncus bulbosus Linnaeus 1762, not 1753; J. supinus Moench
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Juncus compressus
provided by wikipedia EN
Juncus compressus is a species of flowering plant in the rush family, Juncaceae.[1] It is native to temperate Eurasia.[1]Juncus compressus is easy to confuse with J. gerardii.
Description
About 80 cm in height. Rhizomes are short-creeping or densely branching. There are 1-3 cataphylls, and 1-2 leaves. The leaf blade is flat to slightly channeled, measuring 5–35 cm long and 0.8–2 mm wide. Inflorescences consist of 5-60 flowers. Flowers have six stamens, with filaments measuring 0.5-0.7 mm and anthers 0.6–1 mm. Seed capsules are brown.
Habitat
Juncus compressus prefers calcareous wetlands and is often associated with disturbed habitats, such as ditches, roadsides, railroads, and canal banks.[2]
Invasive species
The plant is considered an invasive species in the United States of America.[2]
References
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Juncus compressus: Brief Summary
provided by wikipedia EN
Juncus compressus is a species of flowering plant in the rush family, Juncaceae. It is native to temperate Eurasia.Juncus compressus is easy to confuse with J. gerardii.
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