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bident à trois divisions, three-lobed beggar-ticks, three-lobed beggars-ticks, three-part beggarticks, threelobe beggarticks, tickseed

Bigelow beggarticks, Bigelow's beggarticks, stickseed

Habit Annuals, (5–)20–70(–200) cm. Annuals, (10–)20–80+ cm.
Leaves

sessile or petioles 5–15(–35+) mm (± winged);

blades ± elliptic to ovate or lanceolate, 40–80(–150+) × 15–40(–60+) mm, sometimes laciniately 1-pinnatisect with 1–4+ lobes near bases, bases cuneate, margins entire or dentate to serrate, usually ciliate, apices acute to acuminate, faces glabrous or hirtellous.

petioles 5–25 mm;

blades rounded-deltate overall, 25–90+ × 15–35+ mm, (1–)2(–3)-pinnatisect, ultimate lobes lance-rhombic or ovate to lanceolate, 15–30(–50+) × 5–15(–30+) mm, bases truncate to cuneate, ultimate margins entire or ± serrate to incised, usually ciliolate, apices obtuse to acuminate, faces glabrous.

Peduncles

10–40(–80) mm.

(10–)30–50(–150+) mm.

Involucres

campanulate to hemispheric or broader, (4–)5–7(–12) × (3–)6–12(–15+) mm.

± campanulate, 2.5–5+ × 1.5–3(–4) mm.

Ray florets

usually 0, sometimes 1–5;

laminae orange yellowish, 4–8 mm.

0 or 1(–5+);

laminae whitish, 1–3(–7) mm.

Disc florets

(5–)20–60(–150+);

corollas pale yellow to orange, (2–)3–4 mm (gradually ampliate, anthers usually pale).

13–25+;

corollas yellowish, 1–2 mm.

Phyllaries

(6–)7–8(–13), elliptic-ovate to lance-ovate, (4–)6–9(–12) mm.

8–13+, lanceolate, (3–)4–6+ mm.

Calyculi

of (2–)6–7(–10) ± spreading, oblanceolate or lanceolate to linear, ± foliaceous bractlets or bracts 7–35(–60) mm, margins (entire or serrate) sometimes sparsely ciliate, abaxial faces hispidulous near bases, distally glabrous.

of 8–13 usually spreading, narrowly lanceolate, oblanceolate, or subulate to linear bractlets 2–5 mm, margins entire, usually ciliate, abaxial faces usually glabrous.

Heads

borne singly or in 2s or 3s.

usually borne singly, sometimes in open, ± corymbiform arrays.

Cypselae

blackish to purplish or brown, ± flattened, sometimes weakly 3(–4)-angled, usually cuneate to linear, outer (3–)6–7(–10) mm, inner (4–)6–9(–11) mm, margins proximally antrorsely to patently, distally retrorsely, barbed, apices ± truncate to concave, faces ± 1-nerved, usually smooth, seldom notably tuberculate, glabrous or sparsely strigillose;

pappi 0, or of (1–)3–3(–4+) ± erect to spreading, retrorsely barbed awns (0.2–)2–3(–6) mm.

outer red-brown, obcompressed, cuneate, 6–7 mm, margins not ciliate, apices truncate, faces 2-grooved, antrorsely tuberculate-hirtellous;

inner dark brown to blackish, ± equally 4-angled, linear-fusiform, 10–14 mm, margins not ciliate, apices ± attenuate, faces glabrous;

pappi of 2(–3), erect, retrorsely barbed awns (1–)2–4 mm.

2n

= 48.

Bidens tripartita

Bidens bigelovii

Phenology Flowering Aug–Oct. Flowering Sep.
Habitat Marshes and other wet sites Along streams, other wettish sites
Elevation 10–1700 m (0–5600 ft) 900–2000 m (3000–6600 ft)
Distribution
from FNA
AK; AL; CA; CO; CT; DC; DE; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; QC; Europe; Asia; n Africa [Introduced in Pacific Islands, Australia]
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; NM; OK; TX; Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Plants with cypsela mid-nerves strongly developed (cypselae more or less strongly 4-angled and, often, tuberculate) that are treated below as Bidens connata have been included in B. tripartita, perhaps rightly so. And some botanists have included (or advocated inclusion of) B. eatonii, B. heterodoxa, and/or B. infirma in B. tripartita, as well, perhaps rightly so.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 21, p. 217. FNA vol. 21, p. 210.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Bidens Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Bidens
Sibling taxa
B. amplissima, B. aristosa, B. aurea, B. beckii, B. bidentoides, B. bigelovii, B. bipinnata, B. cernua, B. connata, B. discoidea, B. eatonii, B. frondosa, B. heterodoxa, B. heterosperma, B. hyperborea, B. laevis, B. lemmonii, B. leptocephala, B. mitis, B. pilosa, B. polylepis, B. tenuisecta, B. trichosperma, B. vulgata
B. amplissima, B. aristosa, B. aurea, B. beckii, B. bidentoides, B. bipinnata, B. cernua, B. connata, B. discoidea, B. eatonii, B. frondosa, B. heterodoxa, B. heterosperma, B. hyperborea, B. laevis, B. lemmonii, B. leptocephala, B. mitis, B. pilosa, B. polylepis, B. tenuisecta, B. trichosperma, B. tripartita, B. vulgata
Synonyms B. comosa
Name authority Linnaeus: Sp. Pl. 2: 831. (1753) A. Gray: in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 91. (1859)
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