| TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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 1–many flowers
Flower generally bisexual, small, ± radial; perianth generally 5–6-lobed, base ± tapered, often jointed to pedicel; stamens 2–9, 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 98:321–371; Reveal et al. 1989 Phytologia 66(2–4):83–414]
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: (George J. Goodman, Oklahoma botanist, 1904–)
Reference: [Reveal & Ertter 1976 Brittonia 28:427–429]
| Native |
Annual, spreading, 1–8 cm, thinly hairy
Leaves basal; stipule 0; petiole 3–20 mm; blade 2–6 mm, ± round, lower surface tomentose, upper surface thinly hairy
Inflorescence 2–10 cm diam; bracts leaf-like to linear and awned; involucral bracts 5, free, 3–8 mm, unequal, linear, awned; flowers several–many per involucre
Flower: perianth 0.8–1 mm, yellow, base hairy, lobes 6; stamens 9
Fruit 1–1.2 mm, brownish
Chromosomes: n=20
Ecology: Uncommon. Grassland, alkaline and desert scrub
Elevation: < 2200 m.
Bioregional distribution: s San Joaquin Valley, East of Sierra Nevada, w Mojave Desert
Distribution outside California: Nevada
Flowering time: May–Aug
Synonyms: Oxytheca l. Parry