Bidens connata

Muhlenberg ex Willdenow

Sp. Pl. 3: 1718. 1803.

Common names: Bident conné
Synonyms: Bidens connata var. ambiversa Fassett Bidens connata var. anomala Farwell Bidens connata var. fallax (Warnstorf) Sherff Bidens connata var. gracilipes Fernald Bidens connata var. inundata Fernald Bidens connata var. petiolata (Nuttall) Farwell Bidens connata var. pinnata S. Watson Bidens connata var. submutica Fassett
Treatment appears in FNA Volume 21. Treatment on page 217. Mentioned on page 208.

Annuals, (5–) 25–150 (–200) 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. Heads borne singly or in 2s or 3s. Peduncles 10–35 (–80) 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. Involucres campanulate to hemispheric or broader, (4–) 6–12 × (3–) 6–9 (–15+) mm. Phyllaries (6–) 8 (–9), elliptic to oblong or ovate, (4–) 5–6 (–12) mm. Ray-florets usually 0, sometimes 1–5+; laminae yellowish, 4–8 mm. Disc-florets (5–) 20–40 (–60+); corollas pale-yellow to orange, 2–3 mm (± abruptly ampliate, anthers usually dark, blackish). 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. 2n = 48.


Phenology: Flowering Aug–Oct.
Habitat: Marshes and other wet sites
Elevation: 10–1700 m

Distribution

V21-528-distribution-map.gif

N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Conn., Del., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.C., S.Dak., Tenn., Va., W.Va., Wis., Europe, Asia, n Africa, in Pacific Islands, Australia

Discussion

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

Selected References

None.

Lower Taxa

None.

... more about "Bidens connata"
glabrous +  and hispidulous +
not tailed +, rounded +  and obtuse +
dark +  and pale +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +  and Ronald R. Weedon +
Muhlenberg ex Willdenow +
ciliate +  and barbellate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
less erect +  and spreading +
2 +  and 4 +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cuneate +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
less elliptic;lanceolate +
10mm;30mm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
ascending +  and spreading +
spatulate;oblong;oblanceolate;linear;lanceolate +
barbellulate +  and barbellate +
Bident conné +
pale-yellow +  and orange +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
blackish +  and purplish or brown +
obpyramidal +, usually cuneate +  and linear +
fertile +  and bisexual +
fertile +  and bisexual +
sessile +  and petiolate +
N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Del. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Va. +, W.Va. +, Wis. +, Europe +, Asia +, n Africa +, in Pacific Islands +  and Australia +
10–1700 m +
setulose +, glabrous +  and hirtellous +
tuberculate +
linear-fusiform;4-angled;ovate;orbiculate;oblong;linear;cuneate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Marshes and other wet sites +
discoid +  and radiate +
disciform +  and discoid +
in 2s +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate;hemispheric +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
whorled +  and opposite +
deltate +
barbed +, serrate +, dentate +  and entire +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2-carpellate +
less flat;slightly navicular +
persistent +
of 1-2 , smooth to ciliate or barbed awns or scales +  and coroniform +
3.5 cm35 mm <br />0.035 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering Aug–Oct. +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
connate +  and distinct +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
styliferous +  and neuter +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Bidens connata var. ambiversa +, Bidens connata var. anomala +, Bidens connata var. fallax +, Bidens connata var. gracilipes +, Bidens connata var. inundata +, Bidens connata var. petiolata +, Bidens connata var. pinnata +  and Bidens connata var. submutica +
Bidens connata +
species +
toothed +, serrate +, laciniate +  and dentate +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
25 cm250 mm <br />0.25 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
shrub +  and subshrub +