Flora of North America species comparison

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Baccharis dioica

broombush false willow
Habit Shrubs, 50–300 cm (much branched, bases woody).
Stems

erect, green, striate-angled, glabrous or slightly scurfy.
Leaves

present at flowering; short-petiolate;

blades (1-nerved, lateral veins obscure) obovate to spatulate, 10–30 × 7–18 mm (somewhat fleshy), margins entire or occasionally with 1–2 short, broad teeth per side, bases tapering, apices broadly obtuse, submucronate or slightly retuse, faces glabrous, gland-dotted, sometimes resinous.
Involucres

obconic;

staminate 3–4 mm, pistillate 5–7 mm.
Pistillate florets

20–30;

corollas 4–5 mm.
Staminate florets

20–30;

corollas 3–4 mm.
Phyllaries

ovate to lanceolate, 1–4 mm, margins scarious-erose, medians green, apices obtuse to acuminate.
Heads

(in terminal clusters) in (leafy) corymbiform or paniculiform arrays.
Cypselae

1–2 mm, 8–10-nerved, glabrous;

pappi 3–5 mm (scarcely elongating in fruit).

Baccharis dioica
Phenology Flowering Aug–Nov.
Habitat Hammocks and dune hollows, mangroves
Elevation 0–10 m (0–0 ft)
Distribution
from FNA
FL; Mexico; West Indies
[BONAP county map]
Discussion

Baccharis dioica is known from the southern tip of Florida. It is distinguished by its obovate, entire leaves with broadly obtuse apices, spreading phyllaries, and pappi that scarcely elongate in fruit.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 27.
Parent taxa Asteraceae > tribe Astereae > Baccharis
Sibling taxa
B. angustifolia, B. bigelovii, B. brachyphylla, B. glomeruliflora, B. glutinosa, 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
Name authority Vahl: Symb. Bot. 3: 98. (1794)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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