Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Native

J. acutus L. subsp. leopoldii (Parl.) Snogerup

Perennial, cespitose, 50–140 cm; rhizome much-branched
Stem rigid, hardened, cylindric
Leaves basal, 40–120 cm, rigid; tip hard, sharp; sheath appendages firm
Inflorescence appearing lateral, generally ± open; lowest bract cylindric, resembling stem, < to = inflorescence; branches uneven; clusters 2–4-flowered, each subtended by 1 obvious, clasping bract; bractlets 0
Flower: perianth 2–4 mm, margins membranous, sepals thin, obtuse, petals ± rounded; anthers 6, >> filaments, reddish brown
Fruit generally ± 2 X perianth, nearly spheric, shiny brown
Seed irregular; appendages small
Chromosomes: 2n=48
Ecology: Moist saline places (salt marshes, alkaline seeps)
Elevation: generally < 300 m.
Bioregional distribution: Central Coast, South Coast, s Channel Islands, Sonoran Desert
Distribution outside California: to Arizona, Baja California, S.America, s Africa
Flowering time: May–Jun
Synonyms: var. sphaerocarpus Engelm., spiny rush
Horticultural information: IRR or WET: 5, 7, 8, 9, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24; also STBL; good barrier plant.

Native

J. ambiguus Guss.

Annual, densely cespitose or solitary, 3–17 cm
Stem 0.5–1 mm wide
Leaves ± cauline, generally 1–2 per stem
Inflorescence: flowers ± crowded near slightly coiled branch tips; lowest bract > inflorescence; upper bracts 1/3 to ± = inflorescence; bractlets 1.5 mm
Flower: sepals 4–6.8 mm, acute; petals 3.3–5.3 mm, obtuse or rounded; stamens 6, filaments > anthers
Fruit = to > petals; tip rounded
Seed 0.3–0.4 mm, ovoid or barrel-shaped; appendages 0
Chromosomes: 2n=34
Ecology: Uncommon. Saline places near coast
Elevation: generally < 10 m.
Bioregional distribution: North Coast, Central Coast
Distribution outside California: scattered in N.America, Eurasia, n Africa
Synonyms: J. bufonius L. var. halophilus Buchenau & Fernald

Introduced

J. cyperoides Laharpe

Perennial 5–30 cm; rhizome grading into stem
Stem branched from near base; nodes conspicuous
Leaves evenly spaced on stem, sometimes overlapping; sheath appendages 0; blade with flat side toward stem, crosswalls 0
Inflorescence: lowest bract < inflorescence, resembling cauline leaves; branches many; clusters 1–40, 3–10-flowered; bracts membranous
Flower: perianth segments 2.2–5 mm, ± equal, acuminate, light-colored, sepals concave, petals flat; stamens 6, filaments >> anthers
Fruit ± = to > perianth, 3-angled; beak ± 0.5 mm
Seed 0.4 mm; appendages minute
Ecology: Yellow-pine forest
Elevation: ± 1000 m.
Bioregional distribution: n High Sierra Nevada (Butte Co.)
Distribution outside California: native to S.America
Only North America site, 5600 km from closest population in South America Andes.

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