Jepson Flora Project: Jepson Interchange |
![]() |
TREATMENT FROM THE JEPSON MANUAL (1993) |
previous taxon |
next taxon
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: (Greek: spurred cover, from involucre)
Reference: [Reveal 1989 Phytologia 66:199220]
Native |
Annual, spreading, 330 cm, glandular
Leaves basal; stipule 0; ± petioled; blade 540 mm, oblanceolate, glabrous
Inflorescence 650 cm diam; bract 1 per node, 110 mm, 3-lobed, awns 12 mm; involucre 1 per node, sessile, 28 mm, cylindric above, swollen at base, upper awns 5, < 1 mm, basal awns 3, < 2 mm, curved; flowers 2 per involucre
Flower: perianth 23.5 mm, white to pink, hairy, lobes 6; stamens 9
Fruit 22.5 mm, brown
Chromosomes: n=19
Ecology: Common. Desert scrub, other dry sandy places
Elevation: 3002400 m.
Bioregional distribution: s San Joaquin Valley, e Inner South Coast Ranges, Transverse Ranges, East of Sierra Nevada, Desert
Distribution outside California: to Nevada, Utah, Arizona, nw Mexico
Flowering time: AprJun
Synonyms: Chorizanthe t. (Benth.) S. Watson