|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.
Stems 1530 cm, leafy, generally branched from base
Leaves 512 mm, basal and cauline, sessile; basal and lower cauline generally 34-lobed, upper entire
Inflorescence: heads generally 38, in dense clusters (rarely solitary); receptacle glabrous
Fruit < 2 mm, 10-ribbed; pappus 0
Ecology: Uncommon. Rocky places, ledges, trails, talus near or above timberline
Elevation: 30004000 m.
Bioregional distribution: c&s High Sierra Nevada, East of Sierra Nevada, n Desert Mountains
Flowering time: JulAug
Synonyms: Tanacetum c. D.C. Eaton
Sage-like smell sometimes reported
Horticultural information: DRN, DRY, SUN: 1, 2, 3, 15, 16; DFCLT.