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 (76 cm) or more.
Growth Form: Forb/herb erect; stems green; slender and minutely hairy.
Leaves: Light green; opposite on stems; 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 flower heads; ray florets absent or 1 to 5; disk florets 13 to 25; phyllaries lanceolate; fruit a linear-fusiform cypsela (often mistaken for an achene), reddish-brown with retrorsely barbed, erect, pappi.
Flowering Season: July to September or October
Elevation: 3,000 to 6,500 feet (900-1,980 m)
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 usually occurs in wetlands, but may occur in non-wetlands in the following areas; Arid West, Great Plains and the Western Mountains, Valleys, and Coast.
Threatened/Endangered Information: No data available.
In the Southwestern United States: Arizona, New Mexico and Texas each haves 12 species of Bidens, California has 7 species, Nevada and Utah each have 4 species. All data approximate and subject to revision.Bidens bigelovii has 2 varieties:
Bidens bigelovii var. angustiloba, (AZ);
Bidens bigelovii var. bigelovii, (AZ, CO, NM, OK, TX).
Comments: Bigelow's Beggarticks is named in honor of Dr. John Milton Bigelow an American physician and botanist (1804-1878). Dr. Bigelow had a successful medical practice, and a keen interest in botany, particularly native plants with medical applications. He worked with 3 top American botanists of the day, John Torrey, Asa Gray, and George Engelmann; and had a significant collection of California plants that yielded many new species.
The specific epithet bigelovii is named in honor of Dr. John Milton Bigelow (1804-1878).
Bidens 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.