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.



Ronald L. Hartman (except Silene)

Annual, biennial, perennial herb, rarely dioecious, taprooted or rhizome generally slender
Leaves simple, generally opposite; stipules generally 0; petiole generally 0; blade entire, sheath generally 0
Inflorescence: cyme, generally open; flowers few–many or flower solitary and axillary; involucre generally 0
Flower generally bisexual, radial; hypanthium sometimes present; sepals generally 5, ± free or fused into a tube, tube generally herbaceous between lobes or teeth; awns generally 0; petals generally 5 or 0, generally tapered to base (or with claw long, blade expanded), entire to 2–several-lobed, blade generally without scale-like appendages (inner surface), generally without ear-like lobes at base; stamens generally 10, generally fertile, generally free, generally from ovary base; nectaries generally 0; ovary superior, generally 1-chambered, placentas basal or free-central, styles 2–5 or 1 and 2–3-branched
Fruit: capsule or utricle (rarely modified, dehiscent), generally sessile
Seeds: appendage generally 0
Genera in family: 85 genera, 2400 species: widespread, especially arctic, alpine, temp, n hemisphere; some cultivated (Agrostemma, Arenaria, Cerastium, Dianthus, Gypsophila, Lychnis, Saponaria, Silene, Vaccaria ).



Annual, perennial herb, erect to sprawling; taprooted
Leaf: stipules 1–11 mm, lanceolate and acuminate to widely triangular, scarious, ± entire or splitting ± at tip, white to tan; blade thread-like to linear; vein 1
Inflorescence: generally cyme, terminal, few–many-flowered, open to dense; pedicels 0.5–28+ mm
Flower: sepals 5, ± free, 1.5–10 mm, lanceolate to ovate, glabrous to glandular-hairy; petals 5, 0.6–9 mm, entire; stamens 2–10; styles 3, 0.3–1.9 mm
Fruit: capsule, ovoid; valves 3, spreading with tip recurved
Seeds few–many, dark brown, reddish brown, or black
Species in genus: 40 species: worldwide
Etymology: (Latin: derivative of Spergula )
Reference: [Rossbach 1940 Rhodora 42:57–83,105–143,158–193,203–213]


S. rubra (L.) J. Presl & C. Presl

Annual or short-lived perennial herb, delicate
Stem: lower main 0.3–0.5 mm diam
Leaf scarcely fleshy, 2–4+ per axillary cluster; stipules generally 3.5–5 mm, lanceolate, shiny white, conspicuous, tip ± long-acuminate
Inflorescence 1–3+ X compound or flower axillary, solitary, glandular-hairy
Flower: sepals fused 0.5–0.7 mm, lobes 2–3.2 mm, < 4 mm in fruit; petals pink; stamens 6–10; styles 0.6–0.8 mm
Fruit 3.5–5 mm, 1–1.2 X calyx
Seed 0.4–0.6 mm, reddish to dark brown, wingless; surface sculpture worm-like, minutely papillate
Chromosomes: 2n=18,36,54
Ecology: Open forests, gravelly glades, meadows, mud flats, disturbed areas
Elevation: < 2400 m.
Bioregional distribution: Northwestern California, Cascade Range, c Sierra Nevada Foothills, n&c High Sierra Nevada, Sacramento Valley, Central Western California, South Coast, San Gabriel Mountains, Peninsular Ranges
Distribution outside California: to British Columbia, e N.America, S.America; native to Europe

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