Baccharis dioica

Vahl

Symb. Bot. 3: 98. 1794.

Common names: Broombush falsewillow
Treatment appears in FNA Volume 20. Treatment on page 27. Mentioned on page 25.

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. Heads (in terminal clusters) in (leafy) corymbiform or paniculiform arrays. Involucres obconic; staminate 3–4 mm, pistillate 5–7 mm. Phyllaries ovate to lanceolate, 1–4 mm, margins scarious-erose, medians green, apices obtuse to acuminate. Staminate florets 20–30; corollas 3–4 mm. Pistillate florets 20–30; corollas 4–5 mm. Cypselae 1–2 mm, 8–10-nerved, glabrous; pappi 3–5 mm (scarcely elongating in fruit).


Phenology: Flowering Aug–Nov.
Habitat: Hammocks and dune hollows, mangroves
Elevation: 0–10 m

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.

Selected References

None.

Lower Taxa

None.

"broad" is not a number.

... more about "Baccharis dioica"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Scott D. Sundberg† +  and David J. Bogler +
tapering +
3-nerved +  and 1-nerved +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
obovate;spatulate +
7mm;18mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
Broombush falsewillow +
not 2-lipped +  and actinomorphic +
whitish +, white +  and pale-yellow +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +, obovoid +  and cylindric +
fertile +  and bisexual +
Fla. +, Mexico +  and West Indies +
0–10 m +
resinous +
gland-dotted +
pistillate +  and staminate +
winged +  and beaked +
dispersed +
Hammocks and dune hollows, mangroves +
racemiform +, corymbiform +  and paniculiform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
pistillate +  and staminate +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
short-petiolate +
spreading-reflexed;spreading-reflexed +
less deltate +  and lanceovate +
occasionally +  and entire +
hispid +  and glabrous +
2-carpellate +
brownish +, whitish +  and tawny +
persistent +
25 +  and 50 +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Aug–Nov. +
ovate +  and lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
conic;tholiform;conic;tholiform;flat +
exalbuminous +
1 (?) +  and 20 (?) +
resinous +
striate-angled +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Baccharis dioica +
Baccharis +
species +