Baccharis sarothroides
Baccharis salicina
broom baccharis, desert broom, greasewood, groundsel, rosin-brush
Great Plains false willow, willow-baccharis
erect, striate, sharply angled, green distally, glabrous, resinous.
ascending, striate-angled, glabrous, smooth or minutely roughened, 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.
present at flowering (numerous and well developed); short-petiolate;
blades (at least broader distinctly 3-nerved) oblong to oblanceolate, 25–70 × 5–10(–20) mm, bases tapering attenuate, margins usually serrate distally (teeth 1–3, coarse irregular, ca. 5 mm apart), sometimes entire, apices acute or obtuse, faces finely gland-dotted.
cylindric to hemispheric;
staminate 4–5.2 mm, pistillate 3–8 mm.
narrowly obconic to campanulate;
staminate 4–7 mm, pistillate 5–9 mm.
19–31;
corollas 2.5–3.5 mm.
25–30;
corollas 3–4 mm.
18–35;
corollas 4.2–5 mm.
20–25;
corollas 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).
lanceolate, 2–6 mm, margins scarious, medians green or reddish, apices greenish or purplish, often erose-ciliate, faces glabrous, gland-dotted, resinous.
borne singly (on nearly leafless branches) or (laterally on branchlets) in dense paniculiform arrays.
(100–200+, short-pedunculate or sessile) in (large, crowded, leafy) paniculiform arrays.
2–2.6 mm, finely 8–10-nerved, glabrous;
pappi 7–12 mm.
1.2–2 mm, irregularly 8–10-nerved, glabrous;
pappi 8–12 mm (elongating in fruit).
= 18.
Baccharis sarothroides
Baccharis salicina
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 salicina is recognized by its narrow, gland-dotted leaves with 1–3 irregular teeth on the distal half, heads in loose leafy arrays, campanulate involucres, and cypselae with 8–10 ribs.
The recognition of Baccharis emoryi as a separate species in other floras has been based on its wider, glabrous, eglandular leaves, more cylindric pistillate involucres, and dense whitish pappi. It was said to occur both west of the Rocky Mountains and in western Texas. In our study, expressions of the characters used to distinguish B. emoryi from other species were found to be inconsistent and inadequate to warrant recognition as a distinct species. There appears to be a complex of up to four species—emoryi, salicina, neglecta and angustifolia—that intergrade from west to east. Characteristics progress from broader leaves and larger heads (emoryi form of salicina) to narrow leaves with small heads (neglecta, angustifolia). The delimitation of taxa within this complex merits further investigation.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
KS Wildflowers
