Baccharis Linnaeus (Q2145)
Baccharis is a taxon with the rank genus within the tribe Astereae
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Baccharis Linnaeus
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Baccharis is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Baccharis Linnaeus
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Baccharis Linnaeus
Baccharis
Linnaeus
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 20: Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford University Press, New York.
accepted
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Perennials, subshrubs, shrubs, or trees, 10–600 cm (dioecious [rarely monoecious], usually glabrous, often resinous; bases woody, rarely rhizomatous).
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Stems (1–20+) usually erect or ascending, rarely prostrate (usually striate-angled, rarely terete and smooth; usually green), glabrous, glabrate, hispidulous, or villous, often resinous.
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sessile or petiolate;
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blades 1-nerved or 3-nerved, linear, lanceolate, ovate, oblong, obovate, or rhombic (usually reduced distally), margins entire or coarsely serrate, faces usually glabrous, rarely hispidulous or villous, often gland-dotted and resinous.
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Heads (sessile or pedicellate, unisexual) discoid, usually in paniculiform or corymbiform, sometimes racemiform arrays or borne singly.
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Involucres cylindric to campanulate or hemispheric, 3–9 mm diam.
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Phyllaries 20–40 in 2–5 series (mid usually green, sometimes red or purple), 1-nerved, ovate to lanceolate, unequal, margins usually scarious, often erose or ciliate, sometimes keeled (midribs evident or not, apices obtuse to acute or acuminate, sometimes keeled), usually glabrous, rarely hispid.
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Receptacles flat, tholiform, or conic, pitted or smooth (glabrous, tomentose, or glandular), usually epaleate.
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Functionally staminate florets 10–50;
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corollas white to pale-yellow, tubes about equal to narrowly funnelform throats, lobes 5, spreading-reflexed, deltate to lanceovate (pappi of 20–40 equal, often crisped and minutely barbellate or distally plumose bristles).
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Pistillate florets 20–150;
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corollas whitish, filiform-tubular, lobes 5, spreading-reflexed, ± deltate to lanceovate;
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style-branches (glabrate, flattened), appendages lacking.
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Cypselae light-brown, obovoid to cylindric, ± compressed, 5–10-nerved, glabrous or hispid;
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pappi persistent or falling, of 25–50 whitish to tawny, rarely brownish (elongating and usually surpassing phyllaries in fruit), minutely barbellate, apically attenuate bristles in 1–3 series.
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cylindric
campanulate or hemispheric
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