Bidens radiata Thuill.

Radiating bur-marigold (en), Bident radié (fr), Chanvre d'eau (fr)

Species

Angiosperms > Asterales > Asteraceae > Bidens

Characteristics

Annuals. Stems (5-)15-60(-80) cm tall, erect, branched, in upper part simple, glabrous or indistinctly hairy. Leaves yellowish green, 3-5-parted or dissected, lateral parts lanceolate or ovate-rhombic, serrate-toothed, apical part much larger than laterals, glabrous or subglabrous, on rather long petiolules, sometimes entire, large toothed to parted (Bidens radiata f. pseudocernua Ganeschin). Capitula discoid, erect, 12-15(-20) mm wide, wider than long (sometimes almost 2 ×); calycular bracts narrowly linear, exceeding in length or equal to achenes (including awns); outer phyllaries (9 or)10-12(-14), oblong-linear or lanceolate-linear, 8-20 mm, leaflike, margin with fine prickles, considerably exceeding florets (sometimes almost 3 ×), inner shorter, oval. Florets tubular. Achenes cuneate, 3-4 mm, glabrous, compressed, with 2 awns, equal to or almost shorter than achenes, sometimes awns 4, but then 2 longer than other 2. Fl. Jun-Sep.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination
Spread epizoochory
Mature width (meter) -
Mature height (meter) 0.15 - 0.8
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 7-9
Soil humidity 5-8
Soil texture 1-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

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

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Bidens radiata leaf picture by Raluca Integra Vâlve (cc-by-sa)
Bidens radiata leaf picture by Sandor Samu (cc-by-sa)
Bidens radiata leaf picture by Ghuijs Tuur (cc-by-sa)

Flower

Bidens radiata flower picture by Sandor Samu (cc-by-sa)
Bidens radiata flower picture by bentz gilles (cc-by-sa)
Bidens radiata flower picture by Alain Lagrave (cc-by-sa)

Distribution

Bidens radiata world distribution map, present in Austria, Belarus, Switzerland, China, Czech Republic, Germany, Denmark, Estonia, Finland, France, Italy, Kazakhstan, Liberia, Moldova (Republic of), Netherlands, Poland, Korea (Democratic People's Republic of), Russian Federation, Slovakia, Sweden, and Ukraine

Identifiers

LSID urn:lsid:ipni.org:names:185181-1
WFO ID wfo-0000044153
COL ID LSH8
BDTFX ID 9711
INPN ID 85978
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Bidens tripartita f. pinnatifida Bidens radiata f. radiata Bidens fastigiata var. fastigiata Bidens radiata var. radiata Bidens radiata var. microcephala Bidens radiata f. perpusilla Bidens radiata

Lower taxons

Bidens radiata var. pinnatifida