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Gumweed
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Madia gracilis
  

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About Gumweed (Madia gracilis) Madia gracilis is a species of flowering plant in the aster family known by the common names grassy tarweed, slender tarweed, and gumweed madia. The annual herb is native to western North America: from British Columbia, through California to Baja California; and east to Utah and Montana. It grows in many habitat types except for arid desert areas, including oak woodlands and mixed evergreen forests. Madia gracilis is variable in appearance. In general, it is an aromatic annual herb growing up to 1 metre (3. 3 ft) in height. Its stem is branching, and hairy and glandular in texture. The leaves are up to 10 centimeters long and covered in soft hairs and stalked resin glands. The inflorescence is an array of clusters of flower heads. Each head is lined with phyllaries that are coated densely with stalked knobby resin glands. It bears yellow, lobe-tipped ray florets a few millimeters long and several black-anthered disc florets. The fruit is a flat, hairless achene with no pappus. Uses. The seeds were used to make pinole by the indigenous Mendocino, Miwok, and Pomo peoples of California.
Plant Description
Plant Type
Annual herb

Flower Color
Yellow

Native Status
Native

Natural Setting
Elevation ?
-23' - 8811'

Annual Precip. ?
5.2" - 133.4"

Summer Precip. ?
0.14" - 4.62"

Coldest Month ?
27.0° F - 57.1° F

Hottest Month ?
50.1° F - 80.8° F

Humidity ?
0.01 vpd - 32.65 vpd

Landscaping Information
Common uses
Bee Gardens

Nursery Availability
Never or Almost Never Available


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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