This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants.
|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press
|The second edition of The Jepson Manual (2012) is available from the University of California Press|
|See also the Jepson eFlora, which parallels the Second Edition|
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 from stout, taprooted caudex, generally ± unbranched
Leaves alternate, generally reduced upward; petiole generally << blade, often winged
Inflorescence: heads generally radiate, 1few, ± large; involucre hemispheric or bell-shaped; phyllaries ± many in 23 series, outer often ± leaf-like; receptacle ± convex; chaff scales ± linear, entire, generally ± hairy
Ray flowers (0)520; ligules yellow
Disk flowers many; corollas yellow, lobes short; anthers brown or yellow, tips triangular; style tips linear, tapered
Fruit: pappus 0 or crown of scales; ray achenes 3-angled; disk achenes 4-angled, sometimes ± compressed
Etymology: (Nathaniel J. Wyeth, US explorer, 18021856)
Reference: [Weber 1946 Amer Midl Naturalist 35:400452]
Plant 39 dm, ± rough-hairy
Leaves: basal blades 1050 cm, oblanceolate
Inflorescence: peduncle 2030 cm, soft-hairy; involucre 34 cm diam, hemispheric; phyllaries 2030 mm, linear to ± lanceolate, generally not leaf-like, soft-hairy, ciliate; chaff scales 1315 mm
Ray flowers 821; ligules 1545 mm
Disk flowers: corollas 1011 mm
Fruit 78 mm, ± hairy; pappus of 14 awn-tipped scales, 79 mm (and sometimes crown of smaller scales)
Elevation: < 2000 m.
Bioregional distribution: Northwestern California, Sierra Nevada, South Coast Ranges
Distribution outside California: to Washington
Horticultural information: SUN, DRN: 1, 4, 5, 6, 7, 14, 15, 16, 17, 18 &IRR: 8, 9, 19, 20, 21, 22, 23, 24.
|YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).|