Jepson Flora Project: Jepson Interchange    

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

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



Annual or perennial herb, generally fleshy
Stems generally glabrous
Leaves simple, alternate or opposite, sometimes stipuled
Inflorescence various
Flower bisexual, radial; sepals generally 2(–8), free or fused at base; petals 3–18, free or ± fused; stamens 1–many, free or inserted on corolla; ovary superior or partly inferior, chamber 1, placenta free-central or basal; styles 2–8, generally fused at base
Fruit: capsule, circumscissile or 2–3-valved
Seeds 1–many, generally black, generally shiny
Genera in family: ± 20 genera, ± 400 species: generally temp Am, Australia, s Africa; some cultivated (Lewisia, Portulaca, Calandrinia )
Reference: [Bogle 1969 J Arnold Arbor 50:566–598]
Family description and key to genera by Dieter H. Wilken & Walter A. Kelley.


Kenton L. Chambers

Annual or perennial herb, from stolon, rhizome, tuber, or taproot, glabrous, ± fleshy
Leaves entire; basal 0–many, rosetted; cauline generally 2, generally opposite, free to fully fused into ± 2-toothed disk or cup surrounding stem
Inflorescence: raceme, terminal, 1-sided; pedicels reflexed, becoming erect in fruit
Flower: petals 5, pink or white; stamens 5, epipetalous; ovary chamber 1, placentas basal, style 1, stigmas 3
Fruit: capsule; valves 3, margins rolling inward and forcibly expelling seeds
Seeds 3–6, generally black, generally clearly appendaged
Species in genus: 28 species: North America, e Asia
Etymology: (John Clayton, colonial Am botanist, born 1686)
Reference: [Miller 1978 Syst Bot 3:322–341; Miller & Chambers 1993 Novon 3:268–273]
Some species formerly placed in Montia.


C. rubra (Howell) Tidestr.

Stem 1–15 cm
Leaves: basal 1–8 cm, blade < 2 cm, elliptic to widely deltate, base truncate to wedge-shaped, tip generally obtuse, petiole linear; cauline pair fused or partly free on 1 side, < 4 cm wide, generally round or with 2 squarish corners
Inflorescence sessile, ± dense, 1-bracted at base; flowers 3–30
Flower: sepals 1.5–3 mm; petals 2–3.5 mm, white or pinkish
Fruit 2–3 mm
Seed 1–2 mm, elliptic, shiny, smooth
Ecology: Vernally moist dunes, coniferous forest, scrub, in sun or shade
Elevation: < 2500 m.
Bioregional distribution: Northwestern California, High Cascade Range, High Sierra Nevada, Tehachapi Mountain Area, w Central Western California, Great Basin Floristic Province
Distribution outside California: to British Columbia, South Dakota, Colorado
Intergrades with C. parviflora , C. perfoliata.


subsp. rubra

Leaves: basal diamond-shaped or deltate, widest below middle, base often truncate; cauline ± free (at least on 1 side)
Chromosomes: 2n=12
Ecology: Habitats and range (except NCo, CCo) of sp
Bioregional distribution: Northwestern California (except North Coast), High Cascade Range, High Sierra Nevada, Tehachapi Mountain Area, w Central Western California (except Central Coast), Great Basin Floristic Province
Flowering time: Apr–Jun
Synonyms: Montia perfoliata var. d. (A. Gray) Jeps. misapplied

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bioregional map for CLAYTONIA%20rubra%20subsp.%20rubra being generated

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