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.

PRIMULACEAE

PRIMROSE FAMILY

Anita F. Cholewa and Douglass M. Henderson

Annual, perennial herb, subshrub, glabrous to glandular-hairy
Leaves simple, basal or cauline, alternate, opposite, or whorled, sessile or petioled; stipules 0
Inflorescence sometimes scapose
Flower bisexual, radial; parts generally in 4's or 5's; calyx deeply lobed, often persistent; corolla lobes spreading to reflexed; stamens epipetalous, opposite corolla lobes; ovary generally superior, 1-chambered, placenta basal or free-central, style 1, stigma head-like
Fruit: capsule, circumscissile or 2–6-valved
Seeds small, few–many
Genera in family: ± 25 genera, 600 species: especially n hemisphere; several ornamental (Cyclamen , Dodecatheon , Primula )
Reference: [Channell & Wood 1959 J Arnold Arbor 40:268–288]

CENTUNCULUS

CHAFFWEED

Annual
Leaves cauline, alternate or lowest opposite, ± sessile, entire
Inflorescence: flowers solitary in axils, ± sessile
Flower tiny; parts in 4's or 5's; calyx > corolla, persistent; corolla tube short, urn-shaped, lobes acute, spreading; filaments short, free, glabrous; ovary superior, style very short
Fruit circumscissile, spheric
Species in genus: ± 3 species: temp, tropical
Etymology: (Latin: patchwork)

Native

C. minimus L.


Stem ascending, 3–10 cm
Leaf 2–5 mm, oblanceolate to widely obovate
Flower: parts generally in 4's; calyx ± 3 mm; corolla < calyx, pink; filaments wider at base
Chromosomes: 2n=22
Ecology: Vernal pools, moist places
Elevation: < 950 m.
Bioregional distribution: North Coast, n Sierra Nevada Foothills (Calaveras Co.), Central Coast, San Francisco Bay Area, South Coast
Distribution outside California: to British Columbia, e N.America, Europe, S.America

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