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 to shrub, dioecious, sometimes aromatic, often ± sticky-resinous
Stems erect, channeled
Leaves cauline, alternate, simple, reduced to bracts above
Inflorescence: heads discoid and disciform, borne in terminal or lateral racemes, panicles or cymes; phyllaries overlapping in several series; receptacle naked or chaffy
Disk flowers generally many, functionally staminate; corollas white to pink-tinged; ovary much reduced; pappus of bristles < involucre
Pistillate flowers generally many; corollas thread-like, ± whitish
Fruit ± cylindric, 410-ribbed; pappus of many bristles > involucre
Species in genus: 250400 species: Am
Etymology: (Latin: Bacchus, god of wine)
[Boldt 1989 Baccharis TX Agric Exp Sta, College Station]
Perennial 12 m, from rhizome, glabrous, sticky
Stems generally 1 from base; branches 0few, ascending
Leaves: petioles < 10 mm, winged; blades < 130 mm, lanceolate, entire or finely toothed, principal veins 13
Inflorescence: heads in flat-topped clusters; involucre hemispheric, of staminate heads 3.55 mm, of pistillate heads 3.84.8(6) mm; phyllaries in 23 series, linear to lanceolate, narrow, mostly equal, long-tapered, glabrous, generally sticky; receptacle domed to convex, smooth or sometimes honeycombed, glandular, chaff 0 or 1 series of inconspicuous scales
Staminate flowers 2640; corollas 3.54.3 mm; pappus 34(5) mm
Pistillate flowers 80150; corollas 1.73 mm
Fruit 0.61.5 mm, ± glandular, hairy at tip; ribs 45; pappus 2.64(7) mm
Ecology: Moist salt marshes, stream edges
Elevation: 0750 m.
Bioregional distribution: w Northwestern California, Sierra Nevada Foothills, Great Central Valley, Central Western California, South Coast
Horticultural information: STBL; INV.
|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).|