Bidens bigelovii, Bigelow's Beggarticks
Scientific Name: Bidens bigelovii
Common Name: Bigelow's Beggarticks
Also Called: Bigelow Beggarticks, Stickseed (Spanish: Saitilla)
Family: Asteraceae, Sunflower Family
Synonyms: (Bidens amphicarpa, Bidens duranginensis)
Size: Up to 2.5 feet or more.
Growth Form: Forb/herb erect; stems green; slender and minutely hairy.
Leaves: Light green; opposite on petioles; rounded deltate overall; pinnatisect, ultimate lobes lance-rhombic or ovate to lanceolate; glabrous above.
Flower Color: White and orange daisy-like flowers; usually solitary, sometimes in open corymbiform arrays; radiate or discoid floral heads; ray florets absent or 1 to 5; disk florets 13 to 25; phyllaries lanceolate; fruit a linear-fusiform achene, reddish-brown with retrorsely barbed, erect, pappi.;
Flowering Season: July to October
Elevation: 3,000 to 6,500 feet
Habitat Preferences: Along streams, moist areas, mountain areas and hillsides.
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. In Arizona it is recorded in southern and eastern (Gila County).
North America & US County Distribution Map for Bidens bigelovii.
U.S. Weed Information: No data available.
Invasive/Noxious Weed Information: No data available.
Wetland Indicator: In North America Bidens bigelovii has the following wetland designations: Arid West, FACW; Great Plains, FACW; Western Mountains, Valleys, and Coast, FACW.
FACW = Facultative Wetland, usually occur in wetlands, but may occur in non-wetlands.
Threatened/Endangered Information: No data available.
In the Southwestern United States: Arizona, New Mexico and Texas each have 12 species of Bidens, California has 7 species, Nevada and Utah each have 4 species. All data is approximate and subject to taxonomic changes.Bidens bigelovii has 2 varieties:
Bidens bigelovii var. angustiloba, found throughout its range above,
Bidens bigelovii var. bigelovii, 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.
The specific epithet bigelovii is named in honor of Dr. John Milton Bigelow, (1804-1878), American physician and botanist, born in VT. Best known for his work on grasses and flowering plants of Ohio and for his work identifying and classifying plants of the southwestern United States.
Genus common names; The common names include; Beggarticks, Black Jack, Burr Marigolds, Cobbler's Pegs, Spanish Needles, Stickseeds, Tickseeds and Tickseed Sunflowers, all references to the barbed awns or pappi on the fruit.