Bidens aristosa |
Bidens connata |
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bearded beggarticks, long-bract beggar-ticks, midwestern beggar-ticks, tickseed sunflower |
bident conné, purple-stem beggar-ticks, purplestem beggars-ticks, swamp beggar-ticks |
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Habit | Annuals, (15–)30–60(–150) cm. | Annuals, (5–)25–150(–200) cm. |
Leaves | 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. |
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. |
Peduncles | (10–)30–80+ mm. |
10–35(–80) mm. |
Involucres | ± hemispheric or broader, 6–8(–12) × 10–15 mm. |
campanulate to hemispheric or broader, (4–)6–12 × (3–)6–9(–15+) mm. |
Ray florets | (5–)8–10+; laminae yellow, 10–25 mm. |
usually 0, sometimes 1–5+; laminae yellowish, 4–8 mm. |
Disc florets | (12–)20–40+; corollas yellowish, 2–3+ mm. |
(5–)20–40(–60+); corollas pale yellow to orange, 2–3 mm (± abruptly ampliate, anthers usually dark, blackish). |
Phyllaries | 7–8(–13), lance-ovate to lance-linear, 6–8(–12) mm. |
(6–)8(–9), elliptic to oblong or ovate, (4–)5–6(–12) mm. |
Calyculi | 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. |
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. |
Heads | in ± corymbiform arrays. |
borne singly or in 2s or 3s. |
Cypselae | 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. |
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. |
2n | = 48. |
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Bidens aristosa |
Bidens connata |
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Phenology | Flowering Aug–Oct(–Nov). | Flowering Aug–Oct. |
Habitat | Marshes, meadows, pine forests, disturbed sites | Marshes and other wet sites |
Elevation | 0–300 m (0–1000 ft) | 10–1700 m (0–5600 ft) |
Distribution |
AL; AR; DC; IL; IN; KY; LA; MD; MI; MN; MO; NC; SC; TN; TX; VA; ON
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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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Discussion | Bidens connata may be better treated as part of B. tripartita. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 21, p. 214. | FNA vol. 21, p. 217. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Bidens | Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Bidens |
Sibling taxa | ||
Synonyms | Coreopsis aristosa, B. aristosa var. fritcheyi, B. aristosa var. mutica | 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 |
Name authority | (Michaux) Britton: Bull Torrey Bot. Club 20: 281. (1893) | Muhlenberg ex Willdenow: Sp. Pl. 3: 1718. (1803) |
Web links |
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