Bidens discoidea Britton

Small beggarticks (en), Bident (fr), Bident discoïde (fr)

Species

Angiosperms > Asterales > Asteraceae > Bidens

Characteristics

Annuals, (10–)20–60(–180) cm. Leaves: petioles 10–40(–60) mm; blades deltate to lance-ovate overall, 30–80(–100+) × 10–30(–80+) mm, usually 3-foliolate, leaflets petiolulate, lance-ovate to lanceolate, (10–)20–50(–100) × 5–20(–40) mm, bases cuneate, ultimate margins usually serrate, sometimes ciliate, apices acuminate to attenuate, faces glabrous or hirtellous. Heads usually borne singly, sometimes in 2s or 3s. Peduncles 10–20(–50+) mm. Calyculi of (3–)4(–5+) ± appressed, spatulate to linear, seldom foliaceous bractlets or bracts (3–)12–25 mm, margins seldom ciliate, abaxial faces usually glabrous. Involucres ± hemispheric, 4–5(–7) × 4–6(–9) mm. Phyllaries 5–7, oblong to lanceolate, 4–6+ mm. Ray florets 0. Disc florets (10–)15–20+; corollas ± orange, 1.5–2 mm. Cypselae blackish to red-brown or stramineous, ± flattened, linear to narrowly cuneate, outer 3–5 mm, inner 4–6+ mm, margins not distinctly ciliate, apices ± truncate to concave, faces ± tuberculate, antrorsely strigillose; pappi of 2 ± erect, antrorsely barbed or smooth awns (0.2–)1–2.4 mm. 2n = 24.
More
Glabrous annual 3–8 dm; lvs thin, trifoliolate, on petioles 1–6 cm, the lfls (or at least the terminal one) petiolulate, lanceolate to lance-ovate, serrate, acuminate, the terminal one the largest, to 10 × 4 cm; heads numerous, small, discoid, the disk 3–10 mm wide; outer invol bracts 3–5, linear-spatulate, leafy, much surpassing the disk, scarcely or not at all ciliate-margined; achenes narrowly cuneate, short-hairy, 3–6 mm; pappus of 2 antrorsely setose awns to 2 mm, or nearly obsolete; 2n=24. Wet places; n. N.S., s. Que. and Minn., s. to D.C., Ala., Okla., and Tex. Aug., Sept.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 1.6
Root system -
Rooting depth (meter) 0.2
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 5-6
Soil humidity 7-8
Soil texture 3-4
Soil acidity 4-7
Soil nutriment -
Hardiness (USDA) 1-5

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -45
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Bidens discoidea unspecified picture

Distribution

Bidens discoidea world distribution map, present in Canada, France, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:32404-2
WFO ID wfo-0000004833
COL ID LS7N
BDTFX ID 9679
INPN ID 85953
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Bidens discoidea Coreopsis discoidea Bidens tenerrima