Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many 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)4–5; stamens 4–5, 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):1–28. See glossary p. 25 for illustrations of general family characteristics.


Scott Sundberg

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, 4–10-ribbed; pappus of many bristles > involucre
Species in genus: 250–400 species: Am
Etymology: (Latin: Bacchus, god of wine)
[Boldt 1989 Baccharis TX Agric Exp Sta, College Station]


B. plummerae A. Gray

Subshrub or shrub, < 2 m, hairy or glandular (at least inflorescence)
Stems: branches many, slender, wand-like, ascending
Leaves sessile, 8–45 mm, linear to oblanceolate, entire to finely bristle-toothed; base wedge-shaped; principal veins 1–3
Inflorescence: heads in a panicle; involucre bell-shaped, of staminate heads 5–6.5 mm, of pistillate heads 6–8.5 mm; phyllaries in 5–6 series, linear-lanceolate, hairy, glandular, tip acute to long-tapered; receptacle convex, honeycombed, puberulent
Staminate flowers 19–26; corollas 4–7 mm; pappus 3.5–4.5 mm
Pistillate flowers 20–30; corollas 3.5–5 mm
Fruit 2.7–3.6 mm, puberulent; ribs 5; pappus 7–8.5 mm
Ecology: Rocky slopes, woodlands
Elevation: 0–425 m.
Bioregional distribution: Central Coast, Outer South Coast Ranges, South Coast, n Channel Islands, Western Transverse Ranges.

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bioregional map for BACCHARIS%20plummerae being generated
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).

Retrieve Jepson Interchange Index to Plant Names entry for Baccharis plummerae
Retrieve dichotomous key for Baccharis
Retrieve multiple-entry key (MEKA) for Baccharis
Overlay Consortium of California Herbaria specimen data by county on this map
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