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Mountain Tarweed
Madia glomerata
About Mountain Tarweed (Madia glomerata) 0 Nurseries Carry This Plant Madia glomerata is a species of flowering plant in the aster family known by the common name mountain tarweed. Madia glomerata grows in a wide variety of habitat types, including disturbed areas such as roadsides. It is an annual herb sometimes exceeding a meter in height, its stem branched or not and covered in foliage. It is hairy to bristly in texture, studded with stalked yellow resin glands, and strongly aromatic with an unpleasant scent. The rough-haired leaves are up to 10 centimeters long. The inflorescence is generally a cluster of glandular flower heads with black-tipped yellow disc florets and sometimes one or more tiny greenish or purplish yellow ray florets. The fruit is a flat black achene with no pappus.
Plant Description
Plant Type
Plant Type
Annual herb

3.3 ft tall

Flower Color
Flower Color
Yellow, Black

Wildlife Supported

Butterflies & moths hosted ( 1 confirmed , 1 likely * ) SHOW ALL

Landscaping Information
Common uses
Common uses
Bee Gardens

Natural Setting
Annual Precipitation: 11.6" - 113.1", Summer Precipitation: 0.30" - 3.98", Coldest Month: 25.8" - 48.4", Hottest Month: 48.2" - 74.1", Humidity: 0.45" - 23.27", Elevation: 121" - 9257"

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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