Baccharis neglecta
Baccharis vanessae
linear-leaf false willow, roosevelt or New Deal weed, rooseveltweed
Encinitas baccharis, Encinitas false willow or baccharis, encinitis false willow
(sometimes in clumps) erect, striate-angled, glabrous, eglandular.
erect, slender, rounded, smooth, glabrous or stipitate-glandular proximal to heads.
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).
often withering and sparse by flowering;
sessile;
blades (1-nerved) filiform to linear-oblanceolate, 10–30 × 1–3 mm (slightly fleshy), bases narrowed, margins entire (revolute), apices acute (mucronate), faces glabrous, gland-dotted.
cylindro-campanulate;
staminate 3.5–4 mm, pistillate 4–5 mm.
funnelform;
staminate 3–5 mm, pistillate 3–5 mm.
15–30;
corollas 2.5–3.3 mm.
ca. 25;
corollas 2.5 mm.
10–15;
corollas 2.7–3.3 mm.
15–22;
corollas 4 mm.
ovate to lanceolate, 1–3 mm, margins yellowish, often scarious, medians green or reddish, apices acute to acuminate (often purplish, sometimes erose).
lanceolate (not keeled), 1–4 mm, margins ciliate, chartaceous, apices acute to acuminate (abaxial faces scurfy-glandular).
(axillary and terminal on lateral branches) in pyramidal, paniculiform arrays.
borne singly or in (pedunculate clusters) in loose paniculiform or racemiform arrays.
1–1.5 mm, 10-nerved, glabrous;
pappi 7–12 mm.
2–3 mm, 10-nerved, glabrous or ciliate along nerves;
pappi 7–10 mm.
= 18.
Baccharis neglecta
Baccharis vanessae
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.)
Of conservation concern.
Baccharis vanessae is highly localized in chaparral remnants in relictual Torrey Pine forests of coastal San Diego County. It is distinguished from other species of Baccharis by its filiform leaves and delicate, ciliate phyllaries that reflex at maturity.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
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USDA Plants Database
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