Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit 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, ascending to erect, taprooted
Leaves: basal blades linear to oblanceolate, short-petioled; cauline blades narrowly oblanceolate to oblong-ovate, sessile; vein 1
Inflorescence: cyme, umbel-like, terminal; flowers 3–12; involucral bracts 5–15, ± 0.3–1.8 mm; pedicels 0.5–2.5 cm
Flower: sepals 5, 3–4.5 cm, lanceolate to ovate, glabrous; petals 5, 3.3–5 mm, generally minutely toothed; stamens 5–10; styles 3, 0.5–1.4 mm
Fruit: capsule, ovoid or ovoid-cylindric, straight; teeth 6, recurved
Seeds many, reddish brown
Species in genus: 6 species: temp Eurasia
Etymology: (Greek: all bone, humorous reference to frailty of plant)
Reference: [Shinners 1965 Sida 2:119–128]


H. umbellatum L. subsp. umbellatum

Plant 5–25 cm
Stems 1–many, unbranched, glandular-hairy near middle
Leaves: cauline 1–4 pairs in lower 1/2; blades 2–25 mm, glabrous or margin glandular-hairy
Inflorescence: bracts whorled, 1–2 mm, partly scarious; pedicels ascending to erect, reflexed in fruit, slender
Flower: petals narrowly elliptic, white
Seeds 0.7–0.8 mm, compressed, with marginal ridge opposite an elongate depression; tubercles low, rounded
Chromosomes: 2n=20
Ecology: Uncommon. Disturbed areas
Elevation: < 850 m.
Bioregional distribution: Klamath Ranges, Cascade Range, Central Coast
Distribution outside California: native to c, e, s Europe

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bioregional map for HOLOSTEUM%20umbellatum%20subsp.%20umbellatum being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Holosteum umbellatum subsp. umbellatum
Retrieve dichotomous key for Holosteum
Overlay Consortium of California Herbaria specimen data by county on this map
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