Bidens connata |
Bidens aristosa |
|
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bident conné, purple-stem beggar-ticks, purplestem beggars-ticks, swamp beggar-ticks |
bearded beggarticks, long-bract beggar-ticks, midwestern beggar-ticks, tickseed sunflower |
|
Habit | Annuals, (5–)25–150(–200) cm. | Annuals, (15–)30–60(–150) cm. |
Leaves | sessile or petioles (± winged) 5–15(–35+) mm; blades ± elliptic to lanceolate, (20–)40–100(–200+) × 10–30(–70) mm, sometimes laciniately 1-pinnatisect with 1–4+ lobes near bases, bases cuneate, margins entire or dentate to serrate, usually ciliate, apices attenuate, faces glabrous or hirtellous. |
petioles 10–30 mm; blades lanceolate to lance-linear overall, 30–80(–150) × 10–30(–50) mm, usually laciniately pinnatisect, primary lobes 3–7+, 15–60+ × 2–20 mm, bases cuneate, ultimate margins laciniate to serrate, ciliate, apices acuminate, faces glabrous or sparsely scabrellous. |
Peduncles | 10–35(–80) mm. |
(10–)30–80+ mm. |
Involucres | campanulate to hemispheric or broader, (4–)6–12 × (3–)6–9(–15+) mm. |
± hemispheric or broader, 6–8(–12) × 10–15 mm. |
Ray florets | usually 0, sometimes 1–5+; laminae yellowish, 4–8 mm. |
(5–)8–10+; laminae yellow, 10–25 mm. |
Disc florets | (5–)20–40(–60+); corollas pale yellow to orange, 2–3 mm (± abruptly ampliate, anthers usually dark, blackish). |
(12–)20–40+; corollas yellowish, 2–3+ mm. |
Phyllaries | (6–)8(–9), elliptic to oblong or ovate, (4–)5–6(–12) mm. |
7–8(–13), lance-ovate to lance-linear, 6–8(–12) mm. |
Calyculi | of 2–6+ spreading or ascending, lanceolate, linear, oblanceolate, oblong, or spatulate, ± foliaceous bractlets or bracts 10–25(–35+) mm, margins (entire or serrate) usually ciliate, abaxial faces hispidulous near bases, distally glabrous. |
of 8–12(–16) usually spreading to reflexed, linear, seldom foliaceous bractlets (4–)5–7(–12) mm, margins entire, ciliate, abaxial faces glabrous or ± scabrellous. |
Heads | borne singly or in 2s or 3s. |
in ± corymbiform arrays. |
Cypselae | blackish to purplish or brown, usually (at least inner) ± 4-angled, usually cuneate to linear, sometimes ± obpyramidal, outer (3–)4–7 mm, inner (4–)5–8 mm, margins proximally antrorsely to patently, distally retrorsely, barbed, apices ± truncate to concave, faces usually strongly 1-nerved, usually tuberculate, glabrous or setulose; pappi 0, or of (1–)2–4(–6), ± erect to spreading, antrorsely or retrorsely barbed awns (0.2–)2–5 mm. |
red-brown to blackish, ± flattened (unequally 3–4-angled), broadly cuneate, outer (4–)5–6 mm, inner 5–7 mm (lengths mostly 1.5–2.5 times widths), margins (± corky-winged) patently to antrorsely barbed, apices truncate to concave, faces weakly striate, sometimes tuberculate, glabrous or sparsely strigillose; pappi 0, or of 2(–4) spreading to divergent, antrorsely or retrorsely barbed awns (0.5–)2–4(–6) mm. |
2n | = 48. |
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Bidens connata |
Bidens aristosa |
|
Phenology | Flowering Aug–Oct. | Flowering Aug–Oct(–Nov). |
Habitat | Marshes and other wet sites | Marshes, meadows, pine forests, disturbed sites |
Elevation | 10–1700 m (0–5600 ft) | 0–300 m (0–1000 ft) |
Distribution |
CT; DE; GA; IA; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; MT; NC; ND; NE; NH; NJ; NY; OH; PA; RI; SC; SD; TN; VA; WI; WV; NB; NF; NS; ON; PE; QC; Europe; Asia; n Africa [Introduced in Pacific Islands, Australia]
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AL; AR; DC; IL; IN; KY; LA; MD; MI; MN; MO; NC; SC; TN; TX; VA; ON
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Discussion | Bidens connata may be better treated as part of B. tripartita. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 21, p. 217. | FNA vol. 21, p. 214. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Bidens | Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Bidens |
Sibling taxa | ||
Synonyms | B. connata var. ambiversa, B. connata var. anomala, B. connata var. fallax, B. connata var. gracilipes, B. connata var. inundata, B. connata var. petiolata, B. connata var. pinnata, B. connata var. submutica | Coreopsis aristosa, B. aristosa var. fritcheyi, B. aristosa var. mutica |
Name authority | Muhlenberg ex Willdenow: Sp. Pl. 3: 1718. (1803) | (Michaux) Britton: Bull Torrey Bot. Club 20: 281. (1893) |
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