| Madia exigua | |
|---|---|
| |
Scientific classification
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Madia |
| Species: | M. exigua
|
| Binomial name | |
| Madia exigua | |
Madia exigua is a species of flowering plant in the family Asteraceae known by the common names small tarweed and threadstem madia.
Range
Madia exigua is native to western North America from British Columbia to Baja California, where it grows in many types of dry habitat outside the deserts.
Description
Madia exigua is an aromatic annual herb growing up to half a meter (20") tall, its slender stem coated with hairs, large stalked resin glands, and sometimes bristles. The rough-haired leaves are 1 to 4 centimeters (0.4 to 1.6") long.
The inflorescence 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 inflorescence 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.
External links
- Jepson Manual Treatment: Madia exigua
- USDA Plants Profile: Madia exigua
- Flora of North America: Madia exigua
- Madia exigua — U.C. Photo gallery
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Media related to
Madia exigua at Wikimedia Commons
 | This Madieae article is a stub. You can help Wikipedia by expanding it. |
- Madia
- Flora of Baja California
- Flora of British Columbia
- Flora of California
- Flora of Oregon
- Flora of Washington (state)
- Flora of the Cascade Range
- Flora of the Klamath Mountains
- Flora of the Sierra Nevada (United States)
- Natural history of the California chaparral and woodlands
- Natural history of the California Coast Ranges
- Natural history of the Central Valley (California)
- Natural history of the Channel Islands of California
- Natural history of the Peninsular Ranges
- Natural history of the San Francisco Bay Area
- Natural history of the Santa Monica Mountains
- Natural history of the Transverse Ranges
- Madieae stubs