|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Annual to trees, some dioecious
Stem: nodes often swollen
Leaves simple, basal or cauline, alternate, opposite, or whorled, generally entire; stipules 0 or obvious and fused into a generally scarious sheath around stem
Inflorescence: small cluster, axillary or arrayed in cymes or panicles; involucres sometimes subtending 1many flowers
Flower generally bisexual, small, ± radial; perianth generally 56-lobed, base ± tapered, often jointed to pedicel; stamens 29, often in 2 whorls; ovary superior, styles generally 3, generally fused at base
Fruit: achene, generally enclosed by persistent perianth, generally 3-angled, ovoid, and glabrous
Genera in family: 50 genera, 1100 species: worldwide, especially n temp; some cultivated for food (Fagopyrum ; Rheum , rhubarb; Rumex , sorrel) or ornamental (Antigonon , coral-vine; Muehlenbeckia ; Polygonum )
Reference: [Ronse Decraene & Akeroyd 1988 Bot J Linn Soc 98:321371; Reveal et al. 1989 Phytologia 66(24):83414]
Treatments of the 15 eriogonoid genera are based on the monographic work of James L. Reveal, who is gratefully acknowledged.
Species in genus: 1 sp
Etymology: (Latin: thread stem)
Reference: [Reveal & Ertter 1980 Madroño 27:101109]
Annual, prostrate to erect, 440 cm, woolly
Leaves basal; stipule 0; petiole indistinct; blade 580 mm, linear to oblanceolate
Inflorescence open, 2080 cm diam; branches wiry; bracts 3 per node, 15 mm, generally linear; involucral bracts many, 14 mm, oblanceolate, upper surface very woolly; flowers 530 per involucre
Flower: perianth 0.81.5 mm, greenish white to dark red, glabrous or glandular, lobes 6; stamens 3
Fruit ± 1 mm, brown to black
Ecology: Coastal strand, desert scrub, etc., in sandy soils
Elevation: < 400 m.
Bioregional distribution: Southwestern California, Mojave Desert (Devil's Playground), Sonoran Desert
Distribution outside California: Arizona, nw Mexico
See the CNPS Inventory for information about endangerment and rarity.
Flowers generally visible in surrounding wool; outer perianth lobes generally widely ovate
Ecology: Coastal beaches
Elevation: < 100 m.
Bioregional distribution: South Coast
Distribution outside California: nw Mexico
Horticultural information: TRY.