Madia exigua
| Madia exigua | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Madia |
| Species: | M. exigua
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| 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
[edit]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
[edit]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
[edit]- Jepson Manual Treatment: Madia exigua
- USDA Plants Profile: Madia exigua
- Flora of North America: Madia exigua
- Madia exigua — U.C. Photo gallery
Media related to Madia exigua at Wikimedia Commons
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- 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