Baccharis salicifolia
Baccharis neglecta
mule's fat, mule-fat, seepwillow, water wally
linear-leaf false willow, roosevelt or New Deal weed, rooseveltweed
spreading to ascending, green to tan, simple proximally, sparingly branched distally, striate-angled, glabrous or minutely hairy, resinous and ± resin-varnished.
(sometimes in clumps) erect, striate-angled, glabrous, eglandular.
present at flowering (abundant, well developed);
sessile or petiolate;
blades lanceolate-elliptic, slightly falcate (willowlike), 30–150 × 3–20 mm, bases attenuate, margins usually finely serrate from bases to apices, sometimes entire, apices acute to acuminate, faces glabrous, gland-dotted, ± resinous.
present at flowering;
sessile;
blades (1-nerved, lateral veins obscure) narrowly elliptic to linear, 30–80 × 1–2(–5) mm (moderately thick), bases narrowly attenuate, margins entire or serrate with 2–3 small teeth, apices acute, faces glabrous, gland-dotted (distal reduced, entire).
hemispheric; staminate 3–6 mm, pistillate involucres 3–6 mm.
cylindro-campanulate; staminate 3.5–4 mm, pistillate 4–5 mm.
50–150;
corollas 2–3.5 mm.
15–30;
corollas 2.5–3.3 mm.
(10–)17–48;
corollas 4–6 mm.
10–15;
corollas 2.7–3.3 mm.
ovate to lanceolate, 2–4 mm, margins scarious, erose or irregularly dentate, midribs distinct, medians green or reddish, apices (greenish or brownish purple) obtuse to acuminate (pale and dry, glabrous).
ovate to lanceolate, 1–3 mm, margins yellowish, often scarious, medians green or reddish, apices acute to acuminate (often purplish, sometimes erose).
in terminal, compound corymbiform arrays (often involving distal branches).
(axillary and terminal on lateral branches) in pyramidal, paniculiform arrays.
0.8–1.5 mm, 5-nerved, glabrous;
pappi 3–6 mm.
1–1.5 mm, 10-nerved, glabrous;
pappi 7–12 mm.
= 18, 36.
Baccharis salicifolia
Baccharis neglecta
Baccharis salicifolia is part of a complex that extends through the southwestern United States, Mexico, Central America, and South America to Argentina and Chile (J. Cuatrecasas 1968). It is recognized by the narrowly lanceolate, willowlike, finely serrate leaves with acute or acuminate apices, smallish heads in dense clusters, reddish phyllaries, and 5-nerved cypselae. By tagging and measuring individual plants throughout the year, D. H. Wilken (1972) demonstrated that B. salicifolia has distinct seasonal forms. The North American plants were once known as B. glutinosa or B. viminea, which were differentiated from each other by differences in woodiness, leaf size and serration, and flowering time.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
As circumscribed here, Baccharis neglecta is known north of Mexico only from central Texas, mostly on the Edwards Plateau. It is recognized by its tall and erect habit, very narrow leaves with small shallow teeth, pyramidal arrays, and 10-ribbed cypselae. It is most similar to B. salicina and may represent a xeromorphic, narrow-leaf form or variety of that species. Baccharis neglecta invades rangelands and pastures, forming dense stands. It is an especially aggressive invader of land converted from crops to pasture and it is a prolific seed producer; it readily resprouts when burned or cut.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
OR
CalFlora
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
