Bidens heterodoxa

(Fernald) Fernald & H. St. John

Rhodora 17: 23. 1915.

Common names: Bident différent
Endemic
Basionym: Bidens tripartita var. heterodoxa Fernald Rhodora 15: 76. 1913
Synonyms: Bidens heterodoxa var. agnostica Fernald Bidens heterodoxa var. monardifolia Fernald Bidens heterodoxa var. orthodoxa Fernald & H. St. John Bidens infirma
Treatment appears in FNA Volume 21. Treatment on page 218. Mentioned on page 208, 217.

Annuals, (5–) 25–35 (–55+) cm. Leaves: petioles (narrowly, if at all, winged) 5–20 (–35+) mm; blades lanceolate to lance-linear, (20–) 30–50 (–80+) × (3–) 6–20 (–30+) mm, sometimes laciniately 1-pinnatisect with 2–4+ lobes near bases, bases cuneate, margins incised to serrate, seldom ciliate, apices acute to attenuate, faces glabrous. Heads borne singly or in 2s or 3s. Peduncles 10–35 (–55) mm. Calyculi of (2–) 3–5 (–7) ± erect, oblanceolate or spatulate to linear, ± foliaceous bractlets or bracts (6–) 10–25 (–40+) mm, margins rarely ciliate, abaxial faces usually glabrous, sometimes sparsely hispidulous. Involucres usually obconic to broadly campanulate, rarely hemispheric, (4–) 6–7 × (4–) 5–7 mm. Phyllaries (4–) 5–8,oblong to lanceovate, (4–) 5–8+ mm. Ray-florets usually 0, sometimes 1–3+; laminae orange yellowish, 2–5 (–10) mm. Disc-florets (7–) 20–70+; corollas yellowish, 2.5–3.5 mm. Cypselae: outer redbrown, ± flattened, sometimes 3–4-angled, broadly cuneate, 4–5 (–6) mm, inner blackish, narrowly cuneate, (5–) 6–7 (–8+) mm, margins glabrous or sparsely antrorsely strigillose,apices ± truncate to convex, faces ± 1-nerved, glabrous or sparsely setulose, usually smooth, sometimes ± tuberculate; pappi 0, or of 2 (–4) spreading to divergent, antrorsely or retrorsely barbed awns (0.1–) 1–3.5+ mm. 2n = 48.


Phenology: Flowering Aug–Oct.
Habitat: Borders of estuaries, lakes, marshes, streams
Elevation: 0–10 m

Discussion

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

Selected References

None.

Lower Taxa

None.
... more about "Bidens heterodoxa"
hispidulous +  and glabrous +
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 +
(Fernald) Fernald & H. St. John +
ciliate +  and barbellate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
2 +  and 4 +
0.1 cm1 mm <br />0.001 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
cuneate +
Bidens tripartita var. heterodoxa +
compound +  and simple +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
lanceolate;lance-linear +
6mm;20mm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
erect +  and spreading or reflexed +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
barbellulate +  and barbellate +
Bident différent +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
subterete +, linear-fusiform +, 4-angled +, cuneate +  and oblanceolate or obovate +
fertile +  and bisexual +
fertile +  and bisexual +
sessile +  and petiolate +
N.B. +, P.E.I. +, Que. +  and Conn. +
0–10 m +
setulose +  and glabrous +
tuberculate +
linear-fusiform;4-angled;ovate;orbiculate;oblong;linear;cuneate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Borders of estuaries, lakes, marshes, streams +
discoid +  and radiate +
disciform +  and discoid +
in 2s +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 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 /> (0.7 cm7 mm <br />0.007 m <br />) +
hemispheric;usually obconic;broadly campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
orange yellowish +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
sessile +  and petiolate +
whorled +  and opposite +
deltate +
strigillose +  and glabrous +
incised to serrate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
cuneate +, 3-4-angled +  and flattened +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 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 /> (5.5 cm55 mm <br />0.055 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Aug–Oct. +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
connate +  and distinct +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
styliferous +  and neuter +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Bidens heterodoxa var. agnostica +, Bidens heterodoxa var. monardifolia +, Bidens heterodoxa var. orthodoxa +  and Bidens infirma +
Bidens heterodoxa +
species +
toothed +, serrate +, laciniate +  and dentate +
35 cm350 mm <br />0.35 m <br /> (55 cm550 mm <br />0.55 m <br />) +
25 cm250 mm <br />0.25 m <br /> (35 cm350 mm <br />0.35 m <br />) +
shrub +  and subshrub +