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Meager Tarweed
Madia exigua
About Meager Tarweed (Madia exigua) 0 Nurseries Carry This Plant Madia exigua is a species of flowering plant in the aster family known by the common names small tarweed and threadstem madia. It is native to western North America from British Columbia to Baja California, where it grows in many types of dry habitat outside the deserts. It is an aromatic annual herb growing up to half a meter tall, its slender stem coated with hairs, large stalked resin glands, and sometimes bristles. The rough-haired leaves are 1 to 4 centimeters long. The flower cluster is an array of clustered flower heads on thin, stiff peduncles. Each head has an involucre of phyllaries shaped like a top. The phyllaries are coated in knobby yellow resin glands. At the tip of the flower cluster are minute yellowish ray florets each under a millimeter long, and one or two yellow disc florets. The fruit is an achene with no pappus.
Plant Description
Plant Type
Plant Type
Annual herb

1.6 ft tall

Flower Color
Flower Color

Wildlife Supported

Butterflies & moths hosted ( 3 likely * ) SHOW ALL

Landscaping Information
Full Sun, Part Shade

Common uses
Common uses
Bee Gardens

Natural Setting
Site Type
Site Type
Grassy places, open woodland

Annual Precipitation: 8.1" - 121.2", Summer Precipitation: 0.14" - 3.44", Coldest Month: 22.9" - 57.2", Hottest Month: 48.2" - 79.6", Humidity: 0.01" - 27.66", Elevation: -21" - 9669"

Alternative Names
Common Names: Small Tarweed, Threadstem Madia

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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