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Douglas' falsewillow, marsh baccharis, salt marsh baccharis

Plummer's baccharis

Habit Perennials, 60–210 cm (rhizoma-tous, forming colonies). Subshrubs or shrubs, 60–200 cm (loosely branched, rounded and bushy, ± herbaceous distal to woody bases).
Stems

erect to ascending, striate, glabrous, gland-dotted, resinous.

erect, simple, slender, wandlike, striate, villous or glabrate, glandular or eglandular.

Leaves

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;

sessile;

blades linear to oblong or oblanceolate, 8–55 × 1–13 mm, bases cuneate, margins sharply serrate (teeth fine, sharp, bristly), apices obtuse, faces densely villous or adaxial sometimes glabrate or glabrous.

Involucres

hemispheric;

staminate 3.5–5 mm, pistillate 3.8–4.8(–6) mm.

campanulate;

staminate 4–6 mm, pistillate 6–8.5 mm.

Pistillate florets

80–150;

corollas 1.7–3 mm.

20–30;

corollas 3.5–5 mm.

Staminate florets

26–40;

corollas 3.5–4 mm.

19–26;

corollas 4–7 mm.

Phyllaries

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 (villous), apices acute to acuminate, ciliate, sometimes glandular.

Heads

in dense, terminal, flat-topped, corymbiform arrays.

(50–100+) in compact paniculiform or corymbiform arrays.

Cypselae

0.6–1.5 mm, 5-nerved, glandular, hispidulous distally;

pappi 2.6–4(–7) mm.

2.5–3.6 mm, 5-nerved, villous, viscid;

pappi 7–8.5 mm.

2n

= 18.

Baccharis glutinosa

Baccharis plummerae

Phenology Flowering Jul–Oct (all year).
Habitat Moist salt marshes, coastal strands, stream edges, hillsides, railroads
Elevation 0–1200 m (0–3900 ft)
Distribution
from FNA
CA; OR; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

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.)

Subspecies 2 (2 in the flora).

Baccharis plummerae is recognized by the bushy habit, wandlike, densely villous or glabrate stems, narrowly oblong leaves with sharply serrate margins, and densely villous or glabrate leaves, phyllaries, and cypselae. It is morphologically similar to B. malibuensis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Stems villous, eglandular; leaves (3–)5–13 mm wide
subsp. plummerae
1. Stems glabrate, glandular; leaves 1–2(–3) mm wide
subsp. glabrata
Source FNA vol. 20, p. 27. FNA vol. 20, p. 30.
Parent taxa Asteraceae > tribe Astereae > Baccharis Asteraceae > tribe Astereae > Baccharis
Sibling taxa
B. angustifolia, B. bigelovii, B. brachyphylla, B. dioica, B. glomeruliflora, B. halimifolia, B. havardii, B. malibuensis, B. neglecta, B. pilularis, B. plummerae, B. pteronioides, B. salicifolia, B. salicina, B. sarothroides, B. sergiloides, B. texana, B. thesioides, B. vanessae, B. wrightii
B. angustifolia, B. bigelovii, B. brachyphylla, B. dioica, B. glomeruliflora, B. glutinosa, B. halimifolia, B. havardii, B. malibuensis, B. neglecta, B. pilularis, B. pteronioides, B. salicifolia, B. salicina, B. sarothroides, B. sergiloides, B. texana, B. thesioides, B. vanessae, B. wrightii
Subordinate taxa
B. plummerae subsp. glabrata, B. plummerae subsp. plummerae
Synonyms B. douglasii
Name authority Persoon: Sym. Pl. 2: 425. (1807) A. Gray: Proc. Amer. Acad. Arts 15: 48. (1879)
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