Bidens leptocephala, Fewflower Beggarticks
Scientific Name: Bidens leptocephala
Common Name: Fewflower Beggarticks
Also Called: Tickseed (Spanish: saitilla)
Family: Asteraceae, Sunflower Family
Synonyms: ( )
Size: Under 2 feet.
Growth Form: Forb/herb; erect, stems green, slender.
Leaves: Light green; opposite, petioles, leaves compound with pinnately divided leaflets.
Flower Color: Yellow; solitary heads on tips of long slender peduncles, ray flowers 0, 2 or 3, disk flowers 5 or more; phyllaries subtending flower heads green, lanceolate; fruit a reddish-brown achene with several sharp barbs on tips.
Flowering Season: August to October.
Elevation: 3,000 to 6,000 feet.
Habitat Preferences: Mid to higher elevations, usually along streams or sandy moist areas.
Recorded Range: In North America, Fewflower Beggarticks is found in AZ, NM and in TX near the Rio Grande River. It is also found in Baja California and northwest Mexico. In Arizona, it is found in the central, southern and northeastern parts of the state.
U.S. Weed Information: No data available.
Invasive/Noxious Weed Information: No data available.
Wetland Indicator: Bidens leptocephala is on the USDA 2012 National Wetland Plant List.
Threatened/Endangered Information: No data available.
Comments: In Arizona, Fewflower Beggarticks has a narrow window of preferred habitat where it is usually associated with water or moist areas. Although it ranges well into central Arizona it is primarily a southern Arizona species with records extending into Mexico and throughout Baja California. It is well represented in New Mexico but barely reaches into Texas.
In Southwest Desert Flora also see Bigelow's Beggarticks, Bidens bigelovii.