Bidens aristosa Britton

Bearded beggarticks (en), Bident (fr), Bident aristé (fr)

Species

Angiosperms > Asterales > Asteraceae > Bidens

Characteristics

Annuals, (15–)30–60(–150) cm. Leaves: petioles 10–30 mm; blades lanceolate to lance-linear overall, 30–80(–150) × 10–30(–50) mm, usually laciniately pinnatisect, primary lobes 3–7+, 15–60+ × 2–20 mm, bases cuneate, ultimate margins laciniate to serrate, ciliate, apices acuminate, faces glabrous or sparsely scabrellous. Heads in ± corymbiform arrays. Peduncles (10–)30–80+ mm. Calyculi of 8–12(–16) usually spreading to reflexed, linear, seldom foliaceous bractlets (4–)5–7(–12) mm, margins entire, ciliate, abaxial faces glabrous or ± scabrellous. Involucres ± hemispheric or broader, 6–8(–12) × 10–15 mm. Phyllaries 7–8(–13), lance-ovate to lance-linear, 6–8(–12) mm. Ray florets (5–)8–10+; laminae yellow, 10–25 mm. Disc florets (12–)20–40+; corollas yellowish, 2–3+ mm. Cypselae red-brown to blackish, ± flattened (unequally 3–4-angled), broadly cuneate, outer (4–)5–6 mm, inner 5–7 mm (lengths mostly 1.5–2.5 times widths), margins (± corky-winged) patently to antrorsely barbed, apices truncate to concave, faces weakly striate, sometimes tuberculate, glabrous or sparsely strigillose; pappi 0, or of 2(–4) spreading to divergent, antrorsely or retrorsely barbed awns (0.5–)2–4(–6) mm.
More
Annual or biennial, 3-15 dm, glabrous or slightly hairy; lvs pinnately or bipinnately divided or compound, 5-15 cm including the 1-3 cm petiole, the segments lanceolate or lance-linear, acuminate, incised-serrate or pinnatifid; rays ca 8, 1-2.5 cm; disk 8-15 mm wide; outer invol bracts mostly ca 8(-10), linear, 5-12 mm, mostly shorter than the inner, straight, the back glabrous or finely short-hairy, the margins smooth or moderately ciliate; achenes flat, 5-7 mm, mostly 1.5-2(-2.5) times as long as wide, strigose, the margins antrorsely ciliate and commonly narrow and interruptedly thickish-winged; pappus of 2(-4) antrorsely or retrorsely barbed awns, or none. Wet places, most often in shade; Me. to Minn., s. to Va., Okla., and Tex., probably only intr. eastward. Aug.-Nov.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination
Spread epizoochory
Mature width (meter) -
Mature height (meter) 1.1
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 2-4
Soil acidity 3-7
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

Leaf

Bidens aristosa leaf picture by Ken Borgfeldt (cc-by-sa)
Bidens aristosa leaf picture by Johnny Poppyseed (cc-by-sa)
Bidens aristosa leaf picture by Bergen Silas (cc-by-sa)

Flower

Bidens aristosa flower picture by Seth Morris (cc-by-sa)
Bidens aristosa flower picture by Betty Wood (cc-by-sa)
Bidens aristosa flower picture by Ken Borgfeldt (cc-by-sa)

Distribution

Bidens aristosa world distribution map, present in Canada, France, United Kingdom of Great Britain and Northern Ireland, India, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:32306-2
WFO ID wfo-0000128874
COL ID LS3M
BDTFX ID 9664
INPN ID 85939
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Bidens aristosa f. mutica Bidens aristosa f. fritcheyi Diodonta aristosa Coreopsis aristosa Bidens aristosa f. aristosa Coreopsis aristosa var. aristosa Bidens aristosa var. mutica Coreopsis aristosa var. mutica Bidens aristosa var. aristosa Bidens aristosa