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Bidens frondosa

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About Sticktight (Bidens frondosa) Bidens frondosa is a North American species of flowering plant in the aster family, sunflower family. It is widespread across much of Canada, the United States, and Mexico It is known in many other parts of the world as an introduced species, including Europe, Asia, Morocco, and New Zealand. Its many common names include devil's beggarticks, devil's-pitchfork, devil's bootjack, sticktights, bur marigold, pitchfork weed, tickseed sunflower, leafy beggarticks, and common beggar-ticks. Bidens frondosa is annual herb is usually about 20 to 60 (8-20 inches) centimeters tall, but it can reach 1. 8 meters (72 inches or 6 feet) at times. The stems are square in cross-section and may branch near the top. The leaves are pinnate, divided into a few toothed triangular or lance-shaped leaflets usually up to 6 or 8 centimeters long, sometimes up to 12. The inflorescence is often a solitary flower head, but there may be pairs or arrays of several heads. The head contains many orange disc florets. It often lacks ray florets but some heads have a few small yellow rays. The fruit is a flat black or brown barbed cypsela up to a centimeter long which has two obvious hornlike pappi at one end. The barbed pappi on the fruit help it stick to animals, facilitating seed dispersal. Ecology. The defoliating caterpillar of Hadjina chinensis, which is limited to Bidens species, has been observed on this plant. Invasive species. This plant is invasive in some parts of the world. In New Zealand it is classed as an environmental weed by the Department of It is also weedy in its native range, occurring in pastures and fields and along roadsides.
Plant Description
Plant Type
Perennial herb

Max. Height
0.7 - 4 ft (0.21 - 1.2 m)


Growth Rate

Flower Color

Flowering Season

Native Status

Natural Setting
Elevation ?
-9' - 6828'

Annual Precip. ?
5.0" - 79.2"

Summer Precip. ?
0.15" - 2.49"

Coldest Month ?
33.3° F - 56.1° F

Hottest Month ?
57.3° F - 79.6° F

Humidity ?
0.40 vpd - 29.40 vpd

Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Devil's Bootjack, Devil's Beggarticks, Devil's-pitchfork

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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