Baccharis glutinosa
Baccharis salicina
Douglas' falsewillow, marsh baccharis, salt marsh baccharis
Great Plains false willow, willow-baccharis
erect to ascending, striate, glabrous, gland-dotted, resinous.
ascending, striate-angled, glabrous, smooth or minutely roughened, resinous.
present at flowering; short-petiolate;
blades (1- or 3-nerved, larger prominently 3-nerved) lanceolate, 50–130 × 8–30 mm, bases tapered to petioles, margins entire or finely dentate, apices acute to acuminate, faces glabrous, black gland-dotted.
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.
hemispheric; staminate 3.5–5 mm, pistillate 3.8–4.8(–6) mm.
narrowly obconic to campanulate; staminate 4–7 mm, pistillate 5–9 mm.
80–150;
corollas 1.7–3 mm.
25–30;
corollas 3–4 mm.
26–40;
corollas 3.5–4 mm.
20–25;
corollas 3–5 mm.
narrowly lanceolate, 2–4 mm, inner series ± equal, margins yellowish, medians green to purplish, apices acuminate, erose or ciliate, faces glabrous, gland-dotted, resinous.
lanceolate, 2–6 mm, margins scarious, medians green or reddish, apices greenish or purplish, often erose-ciliate, faces glabrous, gland-dotted, resinous.
in dense, terminal, flat-topped, corymbiform arrays.
(100–200+, short-pedunculate or sessile) in (large, crowded, leafy) paniculiform arrays.
0.6–1.5 mm, 5-nerved, glandular, hispidulous distally;
pappi 2.6–4(–7) mm.
1.2–2 mm, irregularly 8–10-nerved, glabrous;
pappi 8–12 mm (elongating in fruit).
= 18.
Baccharis glutinosa
Baccharis salicina
Occurring along the coast and in interior valleys, Baccharis glutinosa is recognized by the erect, simple stems growing in patches from rhizomes, large lanceolate leaves with three veins and blackish glandular dots, heads in dense, compact, terminal, corymbiform arrays and more or less uniform inner phyllaries. G. L. Nesom (1990h) noted that it is similar to forms of the South American species Baccharis pingraea de Candolle, and that the two taxa may be conspecific.
(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.)
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