Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
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, prostrate to erect, taprooted
Leaf: blade needle-like; vein 1
Inflorescence: cyme, axillary; flowers 2–5, dense or flower solitary, ± sessile
Flower: hypanthium widely obovate to urn-shaped, abruptly expanded above; sepals 5, 1.5–2.2 mm, narrowly triangular to awl-shaped, glabrous, margin thinly scarious; petals 0; stamens 1–10, arising from hypanthium rim; style 2-branched
Fruit: utricle, ovoid
Seed 1
Species in genus: 10 species: Eurasia, Africa, Australia
Etymology: (Greek: hard flower, from the extremely hard hypanthium)


S. annuus L. subsp. annuus

Stem prostrate to erect, much-branched, generally 4–15 cm, rigid; hairs in lines, fine, recurved
Leaf 4–13 mm; sheath scarious, ciliate; tip sharp-pointed
Inflorescence 3–15 mm diam
Flower 3–4.2 mm; hypanthium 10-ribbed, in fruit very hard; sepals narrowly triangular to awl-shaped, erect to spreading; style 2-branched > 1/2 length, ± 0.5 mm
Seed 1.4–1.6 mm, widely ovoid, tan except red crescent near acute tip
Chromosomes: 2n=22,44
Ecology: Meadows, stream margins, serpentine areas, disturbed areas
Elevation: 300–1200 m.
Bioregional distribution: Klamath Ranges, High North Coast Ranges, Outer North Coast Ranges, Cascade Range, n Sierra Nevada, Peninsular Ranges
Distribution outside California: native to Europe

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bioregional map for SCLERANTHUS%20annuus%20subsp.%20annuus 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 Scleranthus annuus subsp. annuus
Retrieve dichotomous key for Scleranthus
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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