Bidens bidentoides

(Nuttall) Britton

Bull Torrey Bot. Club 20: 281. 1893.

Endemic
Basionym: Diodonta bidentoides Nuttall Trans. Amer. Philos. Soc., n. s. 7: 361. 1841
Synonyms: Bidens bidentoides var. mariana (S. F. Blake) Sherff Bidens mariana
Treatment appears in FNA Volume 21. Treatment on page 216. Mentioned on page 208.

Annuals, 10–90+ cm. Leaves: petioles 10–25 mm; blades lanceolate to lance-linear, 40–160 × 3–30+ mm, bases cuneate, margins entire or laciniate to serrate or denticulate, minutely, if at all, ciliate, apices acuminate to attenuate, faces glabrous. Heads usually borne singly, sometimes in open, ± corymbiform arrays. Peduncles 10–30 (–60+) mm. Calyculi of 3–5 usually spreading, narrowly lanceolate to oblanceolate, sometimes foliaceous bractlets or bracts 10–30 (–60) mm, margins entire, usually ciliate, abaxial faces usually glabrous. Involucres narrowly campanulate to cylindric, 9–16 × 5–8 (–12) mm. Phyllaries 4–8+, ± oblong, 9–16 mm. Ray-florets usually 0, sometimes 3–5+; laminae yellowish, 2–10 mm. Disc-florets 6–20 (–30+); corollas yellowish, 3–6 mm. Cypselae redbrown, flattened, sometimes weakly 4-angled, narrowly cuneate to linear, outer 6–10 mm, inner 8–13 mm, margins evenly antrorsely strigillose, apices truncate, faces smooth or ± striate, ± evenly antrorsely strigillose; pappi of 2 (–4) erect to spreading, antrorsely barbed awns (2–) 3–9 mm.


Phenology: Flowering Sep.
Habitat: Borders of streams, estuaries
Elevation: 0–10+ m

Distribution

V21-526-distribution-map.gif

Del., Md., N.J., N.Y., Pa.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Bidens bidentoides"
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 +
(Nuttall) Britton +
ciliate +  and barbellate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
erect +  and spreading +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
cuneate +
Diodonta bidentoides +
compound +  and simple +
4 cm40 mm <br />0.04 m <br /> (16 cm160 mm <br />0.16 m <br />) +
lanceolate;lance-linear +
3mm;30mm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
erect +  and spreading or reflexed +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
barbellulate +  and barbellate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
narrowly cuneate +  and linear +
fertile +  and bisexual +
fertile +  and bisexual +
sessile +  and petiolate +
Del. +, Md. +, N.J. +, N.Y. +  and Pa. +
0–10+ m +
strigillose +, striate +, smooth +  and glabrous +
tuberculate +, striate +  and scabrellous +
linear-fusiform;4-angled;ovate;orbiculate;oblong;linear;cuneate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Borders of streams, estuaries +
discoid +  and radiate +
disciform +  and discoid +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
narrowly campanulate;cylindric +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
sessile +  and petiolate +
whorled +  and opposite +
deltate +
strigillose +
laciniate +  and serrate or denticulate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2-carpellate +
less flat;slightly navicular +
persistent +
of 1-2 , smooth to ciliate or barbed awns or scales +  and coroniform +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Flowering Sep. +
connate +  and distinct +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
Bull Torrey Bot. Club +
styliferous +  and neuter +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Bidens bidentoides var. mariana +  and Bidens mariana +
Bidens bidentoides +
species +
toothed +, serrate +, laciniate +  and dentate +
10 cm100 mm <br />0.1 m <br /> (90 cm900 mm <br />0.9 m <br />) +
shrub +  and subshrub +