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 mat-forming, taprooted
Stem generally round in X -section
Leaf: blades thread-like to ovate; veins 1–5
Inflorescence: cyme, terminal or axillary, open to head- or umbel-like; flowers 1–many; peduncles and pedicels 0–50+ mm
Flower: hypanthium barely present; sepals 5, ± free, 1.5–8 mm, ± lanceolate to widely ovate, glabrous to glandular-hairy; petals 0 or 5, 1.5–10 mm, entire or notched; stamens inserted on obscure to prominent disk; ovary ± superior, styles 3, 0.5–2 mm
Fruit: capsule, ovoid to urn-shaped; teeth 6, ascending to recurved
Seeds 1–15+, grayish, dark brown, reddish brown, yellowish tan, blackish purple, or blackish
Species in genus: 150 species: n temp, especially mtns, arctic Am, Eurasia
Etymology: (Latin: sand, a common habitat)
Reference: [McNeill 1980 Rhodora 82:495–502]


A. ursina B.L. Rob.


Perennial, tufted, green
Stem 10–18 cm, dull to ± shiny, often glandular-hairy
Leaf 5–10 mm, 0.5–1 mm wide, needle-like, herbaceous, sharp-pointed; vein 1
Inflorescence: cyme, terminal; flowers few–many, ± open; pedicels ± 0.5–1.5 mm
Flower: sepals 1.8–3 mm, in fruit < 4.2 mm, obtuse or rounded; petals 2–4.5 mm; nectaries < 0.5 mm, rounded
Seeds 1–2, 2.2–2.5 mm, ± spheric to widely elliptic, compressed, dark purple; tubercles low, rounded, often elongate
Ecology: Rocky soil, pinyon/juniper woodland
Elevation: 1950–2100 m.
Bioregional distribution: e San Bernardino Mountains (Bear Valley, s San Bernardino Co.).Threatened by development, grazing, vehicles.
See the CNPS Inventory for information about endangerment and rarity.
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