TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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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]
Native |
Shrub < 4 m, glabrous, sticky
Stems: branches dense, erect, often leafless at flower
Leaves sessile, < 35 mm, linear-oblanceolate, thick, entire, ± rolled under; principal vein 1
Inflorescence: heads in a panicle; involucre cylindric to hemispheric, of staminate heads 4.25.2 mm, of pistillate heads 5.37 mm; phyllaries in 56 series, lanceolate to ovate, hard, glabrous, generally sticky, tip rounded to acute, receptacle flat to concave, honeycombed, chaff 0
Staminate flowers 1835; corollas 4.25 mm; pappus 34.5 mm
Pistillate flowers 1931; corollas 2.53.5 mm
Fruit 22.6 mm, glabrous; ribs 10; pappus 710.8 mm
Chromosomes: 2n=18
Ecology: Gravelly and sandy washes, roadsides
Elevation: < 850 m.
Bioregional distribution: Peninsular Ranges, Desert
Distribution outside California: to Texas, n Mexico
Flowering time: JunOct
B. emoryi without stem leaves may key here
Horticultural information: SUN, DRN: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 &IRR: 7, 8, 9, 10, 11, 12, 13, 14; male CVS.