Baccharis glutinosa
Baccharis halimifolia
Douglas' falsewillow, marsh baccharis, salt marsh baccharis
consumption-weed, eastern baccharis, eastern false willow, sea-myrtle
erect to ascending, striate, glabrous, gland-dotted, resinous.
erect to ascending, slender, striate-angled, glabrous or minutely scurfy, sometimes 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; short-petiolate or sessile;
blades elliptic to broadly obovate or rhombic, main cauline rhombic, 30–50(–80) × 10–40(–60) mm (thick and firm), bases cuneate, margins entire proximally, usually coarsely serrate distal to middles (teeth 1–3 pairs), faces glabrous, gland-dotted, resinous (distal reduced, entire).
hemispheric; staminate 3.5–5 mm, pistillate 3.8–4.8(–6) mm.
campanulate; staminate 3–5 mm, pistillate 3–5 mm.
80–150;
corollas 1.7–3 mm.
20–30;
corollas 2.5–3.5 mm.
26–40;
corollas 3.5–4 mm.
25–30;
corollas 3–4 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.
ovate to lanceolate, 1–4 mm, margins scarious, medians green, apices obtuse to acute.
in dense, terminal, flat-topped, corymbiform arrays.
3–4 in loose pedunculate clusters in (terminal, leafy-bracted) broad paniculiform arrays.
0.6–1.5 mm, 5-nerved, glandular, hispidulous distally;
pappi 2.6–4(–7) mm.
1–1.8 mm, 8–10-nerved, glabrous;
pappi 8–12 mm.
= 18.
= 18.
Baccharis glutinosa
Baccharis halimifolia
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.)
Native to the Atlantic and Gulf Coastal Plain, Baccharis halimifolia is recognized by its broad, distinctly rhombic, coarsely serrate basal leaves, pyramidal, leafy arrays, and cypselae with large fluffy pappi. The plants are often to 600 cm; the basal leaves might be missed by collectors. Forms with relatively narrow leaves are especially common in Arkansas, Louisiana, and east Texas. These may be the result of hybridization and introgression with B. neglecta, in areas where they are known to hybridize (D. J. Zanowiak 1991), or with B. angustifolia. Hybrids between B. halimifolia and B. angustifolia are known from Florida as well. Baccharis halimifolia has been introduced to Australia and France. In Australia it infests large areas along the coast of southern Queensland and New South Wales. Its success as an invasive weed is attributed to production of a large number of seeds that are widely dispersed by the wind, shade tolerant germination and seedlings, tolerance to wet soils and salinity, and ability to resprout after a fire (W. E. Westman et al. 1975). The leaves of B. halimifolia contain a cardiotoxic glycoside known to cause the death of sheep if they eat about one percent of their body weight in leaves.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
Go Botany
LA Plants
MD Biodiversity
