Burke: Bidens connata vs. Bidens frondosa

	Bidens connata	Bidens frondosa
	purplestem beggars-ticks, swamp beggar-ticks	leafy beggar-ticks, devil's pitchfork, sticktight
Habit		Annual, nearly glabrous throughout, 2-12 dm. tall.
Leaves		Leaves with petioles 1-6 cm. long, pinnately compound, with 3-5 lanceolate, pointed, serrate leaflets up to 10 cm. long and 3 cm. wide.
Flowers		Heads without rays, the disk about 1 cm. wide; outer involucral bracts 5-8, green and leafy, surpassing the orange disk.
Fruits		Achenes flat, narrowly wedge-shaped, dark brown, 5-10 mm. long, with persistant pappus of 2 barbed awns.

	Bidens connata	Bidens frondosa
Identification notes		The leaves of Bidens frondosa have long, slim petioles, while the similar B. tripartita has leaves with winged petioles.
Flowering time	August-September	June-October
Habitat	Marshes, shorelines and other wet, sunny areas.	Shores of ponds, lakes, backwater channels, and other wetland areas at low elevations, often where disturbed.
Distribution	Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Idaho and Montana; native from central North America east to the Atlantic Coast. [WildflowerSearch map]	Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east across North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin	Introduced from eastern North America	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	B. amplissima, B. beckii, B. cernua, B. frondosa, B. tripartita, B. vulgata	B. amplissima, B. beckii, B. cernua, B. connata, B. tripartita, B. vulgata
Web links	Local floras: BC, OR, WA Local Web sites: 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 connata

Bidens frondosa

purplestem beggars-ticks, swamp beggar-ticks

leafy beggar-ticks, devil's pitchfork, sticktight

Habit

Annual, nearly glabrous throughout, 2-12 dm. tall.

Leaves

Leaves with petioles 1-6 cm. long, pinnately compound, with 3-5 lanceolate, pointed, serrate leaflets up to 10 cm. long and 3 cm. wide.

Flowers

Heads without rays, the disk about 1 cm. wide; outer involucral bracts 5-8, green and leafy, surpassing the orange disk.

Fruits

Achenes flat, narrowly wedge-shaped, dark brown, 5-10 mm. long, with persistant pappus of 2 barbed awns.

Bidens connata

Bidens frondosa

Identification notes

The leaves of Bidens frondosa have long, slim petioles, while the similar B. tripartita has leaves with winged petioles.

Flowering time

August-September

June-October

Habitat

Marshes, shorelines and other wet, sunny areas.

Shores of ponds, lakes, backwater channels, and other wetland areas at low elevations, often where disturbed.

Distribution

Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Idaho and Montana; native from central North America east to the Atlantic Coast.

[WildflowerSearch map]

Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east across North America to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Origin

Introduced from eastern North America

Native

Conservation status

Not of concern

Sibling taxa

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

B. amplissima, B. beckii, B. cernua, B. connata, B. tripartita, B. vulgata

Web links