Baccharis texana
Baccharis neglecta
prairie baccharis or false willow, prairie false willow
linear-leaf false willow, roosevelt or New Deal weed, rooseveltweed
simple, erect or procumbent, rigid (woody proximally), herbaceous and leafy distally (dying back annually), striate-angled, glabrous, non-resinous.
(sometimes in clumps) erect, striate-angled, glabrous, eglandular.
present at flowering;
sessile;
blades (1-nerved) linear to narrowly lanceolate, 10–40 × 1–4 mm, bases narrowed, margins minutely undulate, apices acute, faces glabrous, gland-dotted (distal leaves reduced, scalelike).
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).
campanulate;
staminate 4–7 mm, pistillate 7–9 mm.
cylindro-campanulate;
staminate 3.5–4 mm, pistillate 4–5 mm.
20–30;
corollas 3.5–4 mm.
15–30;
corollas 2.5–3.3 mm.
15–20;
corollas 4–5 mm.
10–15;
corollas 2.7–3.3 mm.
lanceolate, 1–7 mm, margins scarious, erose-ciliate, medians green (midribs dark, keeled, dilated), apices acute to acuminate (erose-ciliate, abaxial faces glabrous, minutely papillose-gland-dotted).
ovate to lanceolate, 1–3 mm, margins yellowish, often scarious, medians green or reddish, apices acute to acuminate (often purplish, sometimes erose).
(on short peduncles) in loose corymbiform arrays.
(axillary and terminal on lateral branches) in pyramidal, paniculiform arrays.
3–5 mm, prominently 6–8-nerved, glabrous;
pappi 11–14 mm.
1–1.5 mm, 10-nerved, glabrous;
pappi 7–12 mm.
Baccharis texana
Baccharis neglecta
Baccharis texana is recognized by its low, subshrub habit, simple, more or less herbaceous and leafy stems arising from woody bases, narrow leaves with minutely undulate margins, large pedunculate heads, and erose-ciliate phyllaries with dilated midribs.
(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.)
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