Jepson Flora Project: Jepson Interchange    

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


Perennial, sprawling to erect, rhizomed, with spheric to elongate, tuber-like thickenings 3–12 mm diam
Leaf: blade ± lanceolate; vein 1
Inflorescence: cyme, terminal or axillary; flowers few–many; pedicels 5–30+ mm
Flower: hypanthium short, obscure; sepals 5, ± free, 3–6 mm, lanceolate to oblong-ovate, glandular-hairy; petals 5, 6–12 mm, shallowly 2-lobed; stamens arising from a narrow disk; styles generally 3, 4–4.5 mm
Fruit: capsule, spheric; valves recurved to rolled under
Seeds 1–2, reddish brown
Species in genus: 16 species: North America, Eur, c&e Asia
Etymology: (Latin: false Stellaria , from incorrect placement of sp.)
Reference: [Weber & Hartman 1979 Phytologia 44:313–314]


P. jamesiana (Torr.) W.A. Weber & R.L. Hartm.

Plant 12–45 cm, glandular-hairy, especially below
Stem simple to much-branched, ascending to erect, 4-angled
Leaves 15–100 mm, ± smaller above, thick; margin ± smooth to roughened
Inflorescence: bracts leafy; pedicels ± straight, ascending to spreading
Flower often cleistogamous in lower leaf axils
Seed 2–3.4 mm; tubercles ± prominent, elongate
Chromosomes: 2n=±96
Ecology: Meadows, dry understory of coniferous forest
Elevation: 1400–2700 m.
Bioregional distribution: Klamath Ranges, High North Coast Ranges, High Cascade Range, c&s Sierra Nevada Foothills, High Sierra Nevada, Tehachapi Mountain Area, Western Transverse Ranges, Modoc Plateau
Distribution outside California: to Washington, Montana, New Mexico
Synonyms: Stellaria j. Torr

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bioregional map for PSEUDOSTELLARIA%20jamesiana 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 Pseudostellaria jamesiana
Retrieve dichotomous key for Pseudostellaria
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