Baccharis sarothroides
Baccharis sergiloides
broom baccharis, desert broom, greasewood, groundsel, rosin-brush
desert baccharis, squaw false willow
erect, striate, sharply angled, green distally, glabrous, resinous.
erect, fastigiate, striate-angular, green, 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.
cauline (proximal withering and sparse by flowering);
sessile;
blades (1-nerved) broadly oblanceolate to obovate or spatulate, 10–35 × 5–15 mm (thick, firm), bases attenuate, margins entire or irregularly serrate (teeth 1–4, distal leaves entire), apices obtuse to acute, faces glabrous, gland-dotted, resinous.
cylindric to hemispheric;
staminate 4–5.2 mm, pistillate 3–8 mm.
funnelform to campanulate;
staminate 3–5 mm, pistillate 3–5 mm.
19–31;
corollas 2.5–3.5 mm.
15–30;
corollas 1.6–2.7 mm.
18–35;
corollas 4.2–5 mm.
24–33;
corollas 2–3.5 mm.
ovate to lanceolate, 1–5 mm, margins yellowish, slightly scarious, medians green to yellow, apices rounded to acute (greenish, abaxial faces glabrous, resinous).
ovate to linear-lanceolate, 1–5 mm, margins scarious, erose, medians green, apices rounded to acute, glabrous, gland-dotted, resinous.
borne singly (on nearly leafless branches) or (laterally on branchlets) in dense paniculiform arrays.
(sessile or short-pedunculate on lateral branches) in crowded paniculiform arrays.
2–2.6 mm, finely 8–10-nerved, glabrous;
pappi 7–12 mm.
1–2 mm, prominently 10-nerved, glabrous;
pappi 1.7–3.1 mm.
= 18.
= 18.
Baccharis sarothroides
Baccharis sergiloides
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.)
Baccharis sergiloides is recognized by its fastigiate, broomlike habit, and large obovate leaves that often wither before flowering. It differs from B. sarothroides in its larger leaves, more or less sessile and lateral heads, and smaller florets and fruits.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
