Bidens mitis

(Michaux) Sherff

Bot. Gaz. 81: 43. 1926.

Endemic
Basionym: Coreopsis mitis Michaux Fl. Bor.-Amer. 2: 140. 1803
Treatment appears in FNA Volume 21. Treatment on page 213. Mentioned on page 207, 208.
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Annuals (sometimes persisting), (10–)30–100+ cm. Leaves: petioles 5–20(–30+) mm; blades ± deltate to ovate or lanceolate overall, 30–100 × 10–50+ mm, usually laciniately 1-pinnatisect, ultimate lobes 3(–7), ovate or lanceolate to linear, (5–)25–60(–70+) × (1–)5–10(–12+) mm, bases cuneate, ultimate margins serrate or entire, often ciliolate, apices acute to attenuate, faces glabrous or hirtellous. Heads usually in open, ± corymbiform arrays. Peduncles 20–120 mm. Calyculi of 7–10 spreading, spatulate to linear, seldom foliaceous (± fleshy) bractlets 5–10 mm, margins usually ciliate, abaxial faces glabrous or hirtellous. Involucres hemispheric or broader, 5–6 × 5–8 mm. Phyllaries (6–)8+, lance-ovate to lanceolate, 4–5 mm. Ray florets 8–13; laminae golden yellow, 12–25+ mm. Disc florets 25–50+; corollas yellowish, 2.5–3 mm. Cypselae blackish or brown, flattened or unequally (3–)4-angled, broadly cuneate, outer 2.5–4, inner 3.5–5 mm (lengths mostly 1.5–2.5 times widths), margins not barbed or ciliate, apices ± truncate, faces sometimes obscurely 1-nerved, sometimes tuberculate, glabrous or hirtellous; pappi 0, or of 2 erect, antrorsely barbed awns or ± deltate scales 0.5(–1) mm. 2n = 24.


Phenology: Flowering Sep–Nov.
Habitat: Marshes, borders of estuaries
Elevation: 0–100(–300) m

Distribution

V21-519-distribution-map.gif

Ala., Ark., Del., Fla., Ga., La., Md., Miss., Mo., N.J., N.C., S.C., Tenn., Tex., Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Bidens mitis"
John L. Strother +  and Ronald R. Weedon +
(Michaux) Sherff +
Coreopsis mitis +
Ala. +, Ark. +, Del. +, Fla. +, Ga. +, La. +, Md. +, Miss. +, Mo. +, N.J. +, N.C. +, S.C. +, Tenn. +, Tex. +  and Va. +
0–100(–300) m +
Marshes, borders of estuaries +
Flowering Sep–Nov. +
Megalodonta +
Bidens mitis +
species +