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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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|Family: Juncaceae||View Description||Dichotomous Key|
|Genus: Juncus||View Description||Dichotomous Key|
|Species: Juncus effusus||View Description||Dichotomous Key|
Juncus effusus L. subsp. effusus
Stem: to 105 cm, 2--5 mm wide above sheath, 14--26 fine ridges per side, pith solid. Leaf: sheath 5--14 cm, deep brown below, papillate, dull, upper 1/2 green to pale brown, veins +- strongly converging at broad +- symmetrical summit, margins thin, generally dark-banded, overlapping near tip. Flower: perianth 2.2--2.5 mm, pale brown, spreading or curving away from fruit; filaments > anthers. Fruit: 1.7--2 mm, < perianth, oblong-truncate, brown, partitions concave, united only at base. Seed: +- asymmetrical, appendages minute.
Ecology: Lakeshores, wet pastures, disturbed damp ground; Elevation: < 1700 m. Bioregional Distribution: CaRH, n SN, ScV; Distribution Outside California: to Alaska, eastern North America, native to Eurasia. Fruiting Time: Jun--Oct Note: Invasive, easily mistaken for native subspecies.
eFlora Treatment Author: Peter F. Zika
Jepson Online Interchange
Previous taxon: Juncus effusus subsp. austrocalifornicus
Next taxon: Juncus effusus subsp. pacificus
Citation for this treatment: Peter F. Zika 2016. Juncus effusus subsp. effusus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=75030, accessed on May 06, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 06, 2016.