Baccharis sarothroides
broom baccharis, desert broom, greasewood, groundsel, rosin-brush
erect, striate, sharply angled, green distally, glabrous, resinous.
cauline (proximal withered and/or sparse at flowering);
sessile;
blades (1-nerved) linear-lanceolate, 5–15 × 1–2 mm, reduced to scales distally, thick, bases narrowed, margins entire (often revolute), apices acute, faces glabrous, minutely gland-dotted, resinous.
cylindric to hemispheric;
staminate 4–5.2 mm, pistillate 3–8 mm.
19–31;
corollas 2.5–3.5 mm.
18–35;
corollas 4.2–5 mm.
ovate to lanceolate, 1–5 mm, margins yellowish, slightly scarious, medians green to yellow, apices rounded to acute (greenish, abaxial faces glabrous, resinous).
borne singly (on nearly leafless branches) or (laterally on branchlets) in dense paniculiform arrays.
2–2.6 mm, finely 8–10-nerved, glabrous;
pappi 7–12 mm.
= 18.
Baccharis sarothroides
Baccharis sarothroides is recognized by its broomlike habit, narrow, sharply angular, nearly leafless, green stems, soon-withering proximal leaves, scalelike distal leaves, and heads often terminal on long branches. Specimens from California have smaller heads that sometimes are arranged laterally along the stems.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
