OregonFlora: Bidens laevis vs. Bidens tripartita

	Bidens laevis	Bidens tripartita
		three-lobed beggars-ticks
Ray florets		usually 0, rarely 5–8; rays 5–14 mm, yellow.
Disc florets		10–100+; corollas yellow or orange, 3–5 mm.
Fruits		obovate or wedge-shaped, 3–10 mm; flat or 3–4-angled, glabrous or minutely hirsute, pappi of 2–4 retrorsely barbed awns, 1–3(6) mm.
4–5+, usually erect, sometimes spreading and foliaceous, margins entire or setose proximally; inner 5–10 mm, glabrous.
2n		=48.

	Bidens laevis	Bidens tripartita
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Riverbanks, ponds, marshes, bogs, weedy sites. Flowering Aug–Oct. 0–700 m. Casc, Col, CR, Est, WV. CA, WA; north to AK, northeast to Quebec, east to Nova Scotia, southeast to GA, south to Mexico; Africa, Asia, Australia, Europe. Native.
Source		Flora of Oregon, volume 2, page 203 Kenton Chambers
Sibling taxa	B. beckii, B. cernua, B. frondosa, B. tripartita, B. vulgata	B. beckii, B. cernua, B. frondosa, B. vulgata
Synonyms		Bidens connata
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Bidens laevis

Bidens tripartita

three-lobed beggars-ticks

Ray florets

usually 0, rarely 5–8;

rays 5–14 mm, yellow.

Disc florets

10–100+;

corollas yellow or orange, 3–5 mm.

Fruits

obovate or wedge-shaped, 3–10 mm; flat or 3–4-angled, glabrous or minutely hirsute, pappi of 2–4 retrorsely barbed awns, 1–3(6) mm.

4–5+, usually erect, sometimes spreading and foliaceous, margins entire or setose proximally; inner 5–10 mm, glabrous.

=48.

Bidens laevis

Bidens tripartita

Distribution

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Discussion

Riverbanks, ponds, marshes, bogs, weedy sites. Flowering Aug–Oct. 0–700 m. Casc, Col, CR, Est, WV. CA, WA; north to AK, northeast to Quebec, east to Nova Scotia, southeast to GA, south to Mexico; Africa, Asia, Australia, Europe. Native.

Source

Flora of Oregon, volume 2, page 203
Kenton Chambers

Sibling taxa

B. beckii, B. cernua, B. frondosa, B. tripartita, B. vulgata

B. beckii, B. cernua, B. frondosa, B. vulgata

Synonyms

Bidens connata

Web links