The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

bident conné, purple-stem beggar-ticks, purplestem beggars-ticks, swamp beggar-ticks

Spanish needles, Spanish needles beggar-ticks

Habit Annuals, (5–)25–150(–200) cm. Annuals, (15–)30–100(–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 20–50 mm;

blades rounded-deltate to ovate or lanceolate overall, (20–)30–70+ × (20–)30–60+ mm, (1–)2(–3)-pinnatisect, ultimate lobes obovate or lanceolate, 15–45+ × 10–25+ mm, bases truncate to cuneate, ultimate margins entire, sometimes ciliolate, apices rounded to acute or attenuate, faces usually glabrous, sometimes hirtellous.

Peduncles

10–35(–80) mm.

(10–)20–50(–100) mm.

Involucres

campanulate to hemispheric or broader, (4–)6–12 × (3–)6–9(–15+) mm.

± campanulate, 5–7 × 3–4(–5) mm.

Ray florets

usually 0, sometimes 1–5+;

laminae yellowish, 4–8 mm.

0 or 3–5+;

laminae yellowish or whitish, 1–2(–3) mm.

Disc florets

(5–)20–40(–60+);

corollas pale yellow to orange, 2–3 mm (± abruptly ampliate, anthers usually dark, blackish).

10–20(–30+);

corollas yellowish to whitish, 2–3 mm.

Phyllaries

(6–)8(–9), elliptic to oblong or ovate, (4–)5–6(–12) mm.

8–12, lanceolate to linear, 4–6 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 (7–)8(–10) linear bractlets 3–5 mm, ± appressed, margins ciliate, abaxial faces usually glabrous.

Heads

borne singly or in 2s or 3s.

usually borne singly, sometimes 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, outer weakly obcompressed, 7–15 mm, inner ± 4-angled, linear to linear-fusiform, 12–18 mm, margins not ciliate, apices ± attenuate, faces 2-grooved, often tuberculate-hispidulous;

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

2n

= 48.

= 24, 72.

Bidens connata

Bidens bipinnata

Phenology Flowering Aug–Oct. Flowering (Jun–)Aug–Sep(–Oct).
Habitat Marshes and other wet sites Fields, forests, disturbed, wettish sites
Elevation 10–1700 m (0–5600 ft) 10–1800 m (0–5900 ft)
Distribution
from FNA
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]
[WildflowerSearch map]
from FNA
AL; AR; AZ; CT; DC; FL; GA; IA; IL; IN; KS; KY; LA; MD; MO; MS; NC; NE; NJ; NM; NY; OH; OK; PA; RI; SC; TN; TX; VA; WV; NB; ON; South America; Europe; Asia; Pacific Islands
[WildflowerSearch map]
[BONAP county map]
Discussion

Bidens connata may be better treated as part of B. tripartita.

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

Bidens bipinnata is probably native in eastern Asia and introduced in South America, Europe, Asia, and Pacific Islands.

(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. 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
B. amplissima, B. aristosa, B. aurea, B. beckii, B. bidentoides, B. bigelovii, 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. 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 B. bipinnata var. biternatoides
Name authority Muhlenberg ex Willdenow: Sp. Pl. 3: 1718. (1803) Linnaeus: Sp. Pl. 2: 832. (1753)
Web links