|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.
Annual, glandular, glaucous
Leaves basal; stipule 0; petiole indistinct; blade linear to obovate, hairy
Inflorescence open; bracts generally 3 per node, generally linear-lanceolate, generally fused at base, awned; involucre 1 per node, generally stalked, narrowly funnel-shaped to bell-shaped, teeth 336, awned; flowers 220 per involucre
Flower: perianth white to rose or pale yellow, hairy, lobes 6; stamens 9
Fruit golden-brown to dark brown. w North America., s South America
Etymology: (Latin: sharp box, from involucre)
Reference: [Ertter 1980 Brittonia 32:70102]
Plant 560 cm
Leaf 17 cm, oblanceolate to widely obovate; margin ciliate
Inflorescence glandular on lower half of internodes; involucre funnel-shaped, glabrous; involucral bracts 436, 1.52 mm, generally > half fused (except awns), awns generally 25 mm; flowers 320 per involucre
Flower: perianth 22.5 mm, white to pink, generally strigose; lobes entire
Fruit 1.72 mm
Ecology: Dry, rocky or sandy soils
Elevation: 13002500 m.
Bioregional distribution: s Outer South Coast Ranges, Transverse Ranges.
See the CNPS Inventory for information about endangerment and rarity.
Inflorescence: involucral awns 45, ivory, longest 23 mm
Ecology: Limestone talus
Elevation: 13002300 m.
Bioregional distribution: n San Bernardino Mountains (Greenlead Mine, Holcomb Valley, Cushenbury Canyon)
Synonyms: O. watsonii of most CA references
Threatened by limestone mining.