OregonFlora species comparison

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Juncus effusus ssp. pacificus

common rush, Pacific rush
Stems

usually 2–3.5 mm diameter above distal sheath, with solid pith.
Leaves

distal sheaths usually dark brown to black (light brown) distally, with margins overlapping except distal 1–3 mm, papillose, 8–18.5 cm;

apices strongly asymmetrical, thickened, with raised convex rims, widely winged.
Inflorescences

often open, usually 3–15 cm.
Fruits

tepals in fruit erect.

Juncus effusus ssp. pacificus
Distribution
[BONAP county map]
Discussion

Wet meadows, wet prairie, shores, swales, springs, wet pastures, ditches. 0–700 m. Casc, CR, Est, Sisk, WV. CA, NV, ID, WA; north to British Columbia, northeast to MT, southeast to AZ. Native.

This subspecies is occasionally cultivated but not as commonly as ssp. effusus. Disjunct in the Queen Charlotte Is., Warm Springs Reservation, and the Blue Mountains in Washington. Reports from Idaho and Alaska are based on misidentifications. The unusual thickened and asymmetrical dark sheath apices are unique among the subspecies worldwide (Kirschner 2002).
Source Flora of Oregon, volume 1, page 276
Peter Zika
Sibling taxa
J. effusus ssp. effusus, J. effusus ssp. solutus
Synonyms Juncus effusus var. pacificus
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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