Madia exigua
| Madia exigua | |
|---|---|
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Scientific classification 
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| 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 | |
| Synonyms[2] | |
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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.[3]
Description
[edit]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.[citation needed]
External links
[edit]- 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
[edit]- ^ 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.
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