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Centromadia pungens
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Common Spikeweed
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Centromadia pungens

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About Common Spikeweed (Centromadia pungens) Centromadia pungens, the commmon spikeweed or common tarweed, is a species of North American plants in the tarweed tribe within the sunflower family. It is native to northern Baja California and the western United States (California, Oregon, Washington, Idaho, Nevada, Arizona). The plant is considered a noxious weed in parts of the Pacific Northwest. Centromadia pungens is an herb up to 120 cm (48 inches) tall. It produces arrays of numerous yellow flower heads with both ray florets and disc florets.
Plant Description
Plant Type
Annual herb

Max. Height
4 ft (1.2 m)

Flower Color

Native Status

Natural Setting
Site Type
Grassy, wet places, marshes


Elevation ?
-33' - 5841'

Annual Precip. ?
4.3" - 58.5"

Summer Precip. ?
0.14" - 1.46"

Coldest Month ?
28.0° F - 56.1° F

Hottest Month ?
59.4° F - 87.4° F

Humidity ?
0.49 vpd - 38.67 vpd


Landscaping Information
Common uses
Bee Gardens

Nursery Availability
Never or Almost Never Available

Other Names
Botanical Names
Hemizonia pungens|Hemizonia pungens;Hemizonia pungens

Common Names
Common Tarweed

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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