Bidens laevis, Smooth Beggartick
Scientific Name: Bidens laevis
Common Name: Smooth Beggartick
Also Called: Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold
Family: Asteraceae, Sunflower Family
Synonyms: (Bidens elegans, Bidens nashii, Bidens persicaefolia, Helianthus laevis)
Duration: Annual, perennial
Size: 6 to 36 inches (15-91 cm).
Growth Form: Forb/herb; generally glabrous, plants decumbent to erect.
Leaves: Green; opposite, deciduous, simple; acute to acuminate; sessile, lanceolate or lance-oblong leaf bases cuneate to rounded, margins usually coarsely dentate to serrate, sometimes ciliate.
Flower Color: Yellow, bright yellow; floral heads erect, radiate; ray florets 7 or 8, bright yellow; disk florets 60 to 100, corollas yellow to orange-yellow; phyllaries 8 to 12, ovate or obovate; fruit narrowly wedge-shaped cypsela (mistakenly referred to as an achene).
Flowering Season: August to October or November
Elevation: 3,500 to 9,000 feet (1,000-2,700 m); below 6,500 feet (2,000 m) in California
Habitat Preferences: Freshwater wetlands, sloughs and shallow lakes.
Recorded Range: Smooth Beggartick is found in the southern half of the United States, north to New England states and southward into Mexico and South America.
North America & US County Distribution Map for Bidens laevis.
U.S. Weed Information: No information available.
Invasive/Noxious Weed Information: No information available.
Wetland Indicator: In North America Bidens laevis is listed as "almost always occur in wetlands" in the following wetland designations: Arid West, Atlantic and Gulf Coastal Plain, Eastern Mountains and Piedmont, Great Plains, Midwest, Northcentral & Northeast and Western Mountains, Valleys, and Coast.
Threatened/Endangered Information: In North America Bidens laevis (Smooth Bur-marigold) is listed as Threatened by the state of New York.
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.Comments: Smooth Beggartick is a native beautiful wildflower in the United States and Mexico. It is now commercially available in the nursery trade through several Internet sources often under the names Joaquin Sunflower and Bur Marigold.
The type (Bidens persicaefolia) from near Ruby, (Santa Cruz County) Arizona.
The species epithet "laevis" means smooth, free from hairs or roughness.
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.
See complete listing of ethno-botanical uses at Native American Ethnobotany, University of Michigan, Dearborn.