|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.
Species in genus: 1 sp.: w US
Etymology: (Greek: fused bristles)
Reference: [Tomb 1972 Madroño 21:459462]
Perennial from branched caudex; sap milky; herbage glabrousSee the CNPS Inventory for information about endangerment and rarity.
Stems 14 dm, much-branched
Leaves all cauline, alternate, 15 cm, linear to narrowly lanceolate (or scale-like), acute, entire
Inflorescence: heads ligulate, solitary on branchlets 25(7) cm; involucre 1115 mm, narrowly cylindric; phyllaries in 2 series, outer 710 short, wide, inner 5 long, linear-oblong; receptacle naked
Flowers 5 per head; ligules 612 mm, pale lavender-white, readily withering
Fruit 812 mm, columnar, 45-ridged, glabrous; pappus double, of 5 stiff awns and generally many bristles, all fused at base, yellowish or tan
Ecology: Sand dunes, desert scrub
Elevation: 9001900 m.
Bioregional distribution: White and Inyo Mountains, n Mojave Desert (Eureka Valley)
Distribution outside California: se Oregon, w Nevada
Flowering time: MaySep
Horticultural information: TRY.