Difference between revisions of "Bidens eatonii"
Rhodora 5: 92, plate 45, figs. 11–14. 1903.
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|publication year=1903 | |publication year=1903 | ||
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− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V19-20-21/V21_529.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae |
Revision as of 21:38, 16 December 2019
Annuals, (10–)25–70(–150) cm. Leaves: petioles (narrowly, if at all, winged) 10–35+ mm; blades lance-ovate to lanceolate, (20–)35–100+ × 5–25+ mm, sometimes with 1–4 lobes near bases, bases cuneate, margins serrate, seldom ciliate, apices attenuate, faces glabrous. Heads borne singly or in 2s or 3s. Peduncles 10–35+ mm. Calyculi of (2–)3–5 ± erect, oblanceolate to linear, ± foliaceous bractlets or bracts 7–25(–70+) mm, margins sometimes obscurely ciliate, abaxial faces glabrous. Involucres usually cylindric to campanulate, rarely hemispheric, (4–)8–10(–12) × (4–)7–9 mm. Phyllaries 5–6, oblong to lance-ovate, 8–13 mm. Ray florets usually 0, sometimes 1–3+; laminae yellow-orange, 2–5(–10) mm. Disc florets 7–30+; corollas yellowish, 2.5–3.5 mm. Cypselae blackish to purplish or red-brown,± flattened, sometimes 3–4-angled, narrowly oblanceolate, outer 5.5–10 mm, inner 6.5–11 mm, margins barbed or ciliate (proximally antrorsely, distally retrorsely), apices ± truncate, faces ± 1-nerved, glabrous or sparsely setulose, often ± striate and/or tuberculate, pappi of 2–4(–5) erect to spreading, antrorsely or retrorsely barbed awns 3–4.5 mm. 2n = 48.
Phenology: Flowering Sep–Oct.
Habitat: Borders of estuaries, marshes, tidal flats
Elevation: 0–10 m
Distribution
N.B., P.E.I., Que., Conn., Maine, Mass., N.J., N.Y., R.I.
Discussion
Bidens eatonii may be better treated as part of B. tripartita.
Selected References
None.