Bidens bigelovii, Bigelow's Beggarticks
Scientific Name: Bidens bigelovii
Common Name: Bigelow's Beggarticks
Also Called: Bigelow Beggarticks and Stickseed, (Spanish: Saitilla).
Family: Asteraceae, Sunflower Family
Synonyms: ( )
Size: Up to 2.5 feet.
Growth Form: Forb/herb; erect, stems green, slender and minutely hairy.
Leaves: Light green; opposite, petioles, leaves compound with pinnatelydivided leaflets.
Flower Color: White daisy-like flowers; most often solitary on tips of long green stems; ray flowers 5, disk flowers numerous; fruit an achene, reddish-brown with barbed awns.
Flowering Season: July to October.
Elevation: 3,000 to 6,500 feet.
Habitat Preferences: Moist areas, mountain areas, hillsides and along streams.
Recorded Range: Bigelow’s Beggarticks can be found in the southwestern United States in AZ, NM and TX and in CO and OK. It is also found in northwest Mexico. It is recorded in southern and eastern Arizona and Gila County as well.
U.S. Weed Information: No data available.
Invasive/Noxious Weed Information: No data available.
Wetland Indicator: Bidens bigelovii is on the USDA 2012 National Wetland Plant List.
Threatened/Endangered Information: No data available.
Bidens bigelovii var. angustiloba found throughout its range above and
Bidens bigelovii var. bigelovii which is found only in Arizona.
Comments: Plants in the genus Bidens are collectively called "Beggarticks" or "Spanish-Needles" because they usually have very sharp pointed barbs or hooked burrs that readily stick to animal fur and clothing, a seed dispersal strategy for many species. The Latin name Bidens is loosely translated to "two-teeth" referring to sharp barbs and hooks on the seed awns.
In Southwest Desert Flora also see Fewflower Beggarticks, Bidens leptocephala.