|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 tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1many per head
Flowers bisexual, unisexual, or sterile, ± small, of several types; calyx 0 or modified into pappus of bristles, scales, or awns, which is generally persistent in fruit; corolla radial or bilateral (rarely 0), lobes generally (0)45; stamens 45, anthers generally fused into cylinder around style, often appendaged at tips, bases, or both, filaments generally free, generally attached to corolla near throat; pistil 1, ovary inferior, 1-chambered, 1-seeded, style 1, branches 2, generally hair-tufted at tip, stigmas 2, generally on inside of style branches
Fruit: achene, cylindric to ovoid, generally deciduous with pappus attached
Genera in family: ± 1300 genera, 21,000 species (largest family of dicots): worldwide. Largest family in CA. Also see tribal key to CA genera: Strother 1997 Madroño 44(1):128. See glossary p. 25 for illustrations of general family characteristics.
Perennial, subshrub, often from long, thick caudex, silky; hairs basally forked, attached off-center; herbage dotted with resin glands
Leaves alternate, often crowded at base; simple and entire or 3-lobed to 13-pinnately dissected
Inflorescence: heads disciform, fewmany; involucre hemispheric; phyllaries in 23 overlapping series, scarious-margined and -tipped; receptacle hemispheric, naked or hairy
Pistillate flowers few, marginal; corolla cylindric to lance-ovoid
Disk flowers more numerous; corolla tubular to bell-shaped; anther tips ovate, bases rounded or ± cordate; style branches truncate, tips shrub-like
Fruit cylindric, generally 510-ribbed; pappus generally 0 or a narrow crown
Species in genus: 9 species: w. North America
Etymology: (Greek: spherical division)
Reference: [Holmgren et al. 1976 Brittonia 28:255272]
Segregated from Tanacetum.
Perennial from elongate, thick woody caudex
Stems 430 cm, branched from base
Leaves < 10 cm, 13-pinnately divided; basal and lower cauline petioled, upper sessile
Inflorescence: heads generally 35, in open clusters (rarely solitary); receptacle hairy
Fruit < 2 mm, 5-ribbed, swelling when wet; pappus 0
Ecology: Mtn meadows, hot springs, alkaline areas
Elevation: 18002400 m.
Bioregional distribution: n&c High Sierra Nevada, Great Basin Floristic Province
Distribution outside California: to Oregon, Idaho, Nevada
Synonyms: Tanacetum p. A Gray
See the CNPS Inventory for information about endangerment and rarity.
Stems 415 cm, generally leafless
Leaves: basal generally 1-pinnately divided
Inflorescence: heads generally < 4 in an open cluster
Ecology: Uncommon. Generally alkaline areas
Elevation: 21002400 m.
Bioregional distribution: c High Sierra Nevada, East of Sierra Nevada
Distribution outside California: to Idaho, Nevada
Horticultural information: IRR, SUN, DRN: 1, 2, 3, 7, 15, 16; DFCLT.