|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
For up-to-date information about California vascular plants, visit the Jepson eFlora.
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.
Subshrubs, appearing glabrous
Stems decumbent, widely spreading or erect, striate; old growth gray, bark sometimes shreddy with age; new growth white below, tips green
Leaves simple, sometimes in axillary clusters below, spreading-ascending to appressed-erect, linear to narrowly oblanceolate, generally minutely spine-tipped, pale green to light gray-green
Inflorescence: heads radiate or discoid, 1many in rounded to ± flat-topped clusters, very small in bud, expanding rapidly in fruit; involucres widely bell-shaped to nearly spheric; phyllaries 2024 in 23 series, ovate to ovate-elliptic, bases cream-yellow, tips green, margins scarious; receptacle deeply pitted, with projections between flowers but not chaffy
Ray flowers present or 0; ligules yellow
Disk flowers many; corollas funnel-shaped, yellow, sinuses deep, lobes spreading to reflexed, style-branch appendages lanceolate
Fruit densely long-hairy, hairs white, bronze, or brownish; pappus of 2025 wide, stiff, widely spreading bristles, slightly > fruit
Species in genus: 2 species: sw US
Etymology: (Greek: unbending pappus)
Reference: [Lane 1988 Madroño 35:247265]
Stems much-branched, ascending to erect, generally < 1 m
Leaves < 1.5 cm, < 3 mm wide, generally linear to oblanceolate
Inflorescence: heads very many, borne singly or clustered; involucre hemispheric to spheric
Ray flowers 0
Disk flowers 1327; corollas 23.5 mm
Fruit < 3 mm
Ecology: Gravelly or rocky soils on flats or slopes in deserts to juniper woodlands
Elevation: 602200 m.
Bioregional distribution: Tehachapi Mountain Area, San Gabriel Mountains, San Bernardino Mountains, Peninsular Ranges, East of Sierra Nevada, Desert
Distribution outside California: to Utah, s Nevada, Arizona
Varieties sometimes occur together and intergrade.
Herbage ± densely rough-puberulent
Stems generally < 6 dm
Ecology: Habitats of sp.
Elevation: < 1600 m.
Bioregional distribution: Tehachapi Mountain Area, San Gabriel Mountains, San Bernardino Mountains, East of Sierra Nevada, Mojave Desert
Distribution outside California: Arizona, s Nevada
Flowering time: MayJun
|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).|