Baccharis malibuensis
Baccharis pteronioides
Malibu baccharis, Malibu baccharis or coyote brush
yerba de pasmo
erect to arching, striate-angled, glabrous or sparsely villous distally (hairs short, spreading).
erect, terete, brittle, slightly striate, scabrous, stipitate-glandular, papillose-roughened.
present at flowering (sparse); short-petiolate;
blades (1- or 3-nerved) linear to linear-oblanceolate, (15–)20–45(–65) × 1–4(–5) mm, bases narrowly attenuate, margins entire or weakly serrate, apices acute or acuminate (crustose);
faces glabrous or sometimes sparsely pilose (hairs 2-seriate), adaxial gland-dotted (in pits; distal leaves reduced, crowded).
cauline (proximal withering before flowering, distal crowded in gascicles);
sessile;
blades linear to lanceolate or spatulate, 5–25 × 1–6 mm (stiff, coriaceous to fleshy), bases attenuate, margins sharply serrate (teeth 1–5 pairs, distal leaves often entire), faces glabrous, gland-dotted, resinous.
turbinate;
staminate ca. 5 mm, pistillate ca. 5 mm.
campanulate;
staminate 4–5 mm, pistillate 5–6(–7) mm.
35–38;
corollas 2.2–4.2 mm.
15–20;
corollas 4–5 mm.
23–36;
corollas 3.7–4.5 mm.
15–20;
corollas 4–5 mm.
linear-lanceolate, 2–5 mm, margins yellowish white, scarious, medians green, apices becoming brown with age, ciliate distally.
ovate to lanceolate, 1–5 mm, margins scarious, medians green, apices acute to acuminate, glabrous.
in cylindric paniculiform arrays.
(10–20+ on densely leafy lateral branchlets) in spreading racemiform arrays.
2.4–3 mm, 5-nerved, faces with thick, irregular, glandlike hairs;
pappi 6.5–7.5 mm.
1.8–3 mm, 8–10-nerved, minutely papillose-glandular;
pappi 8–10 mm (bristles rigid).
Baccharis malibuensis
Baccharis pteronioides
Of conservation concern.
Baccharis malibuensis is known only from the Malibu Creek drainage area in the Santa Monica Mountains (Los Angeles County). It is distinguished by its narrow, often conduplicate and glabrate leaves, cylindric arrays, and summer flowering. According to Beauchamp and Henrickson, it appears to be closely related to and possibly derived from B. plummerae, from which it differs primarily in leaf size, teeth, and indument.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Baccharis pteronioides is characterized by its shrubby stiff habit, rough gray bark, branches that are evenly spaced and often at 45° angles, fascicles of narrow sessile leaves, and heads in racemiform arrays on short leafy branches. The Mexican common name yerba de pasmo refers to an infusion of the leaves used to treat chills (pasmo) and sores; the plants are also said to be poisonous to cattle and sheep.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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