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
|
| Binomial name | |
| Madia exigua | |
| Synonyms[2] | |
| |
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.[3]
Description
Madia exigua is an aromatic annual herb growing up to 50 cm (20 in) tall its slender stem coated with hairs, large stalked resin glands, and sometimes bristles. The rough-haired leaves are up to 4 cm (1.6 in) long.[3]
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.[3] The fruit is an achene with no pappus.
External links
- Jepson Manual Treatment: Madia exigua
- USDA Plants Profile: Madia exigua
- Madia exigua — U.C. Photo gallery
- Media related to Madia exigua at Wikimedia Commons
References
- ^ NatureServe (6 December 2024). "Madia exigua | NatureServe Explorer". NatureServe Explorer. Arlington, Virginia. Retrieved 23 December 2024.
- ^ "Madia exigua (Sm.) Greene | Plants of the World Online | Kew Science". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 23 December 2024.
- ^ a b c Strother, John L.; Baldwin, Bruce G. (August 2023). Flora of North America. Oxford University Press. p. 306. ISBN 0-19-530565-5.