Hazardia cana is a rare North American species of shrubs in the family Asteraceae known by the common names Guadalupe hazardia, San Clemente Island hazardia, or simply island hazardia.[4] It is native to San Clemente Island, one of the Channel Islands of California, and to Guadalupe Island (part of the State of Baja California).[5][6][7]
| Hazardia cana | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Hazardia |
| Species: | H. cana
|
| Binomial name | |
| Hazardia cana | |
| Synonyms[2][3] | |
| |
Hazardia cana is a bushy shrub reaching 1.5–2 metres (4 ft 11 in – 6 ft 7 in) high. It has woolly, glandular herbage of oblong, sometimes finely toothed leaves 4–12 centimetres (1.6–4.7 in) long. At the ends of its grayish stems it produces cylindrical flower heads. Each flower head has several rows of dark-colored phyllaries and an open end revealing disc florets and longer protruding ray florets. The florets are yellow when young but may age to red or purple.[8] The main threat to this species on San Clemente Island was the presence of feral goats. The goats have been removed from the island and the plant is recovering.
References
edit- ^ "NatureServe Explorer 2.0".
- ^ The Plant List, Hazardia cana (A.Gray) Greene
- ^ Tropicos, Haplopappus canus (A. Gray) S.F. Blake
- ^ "Hazardia cana (A. Gray) Greene Island hazardia". USDA. PLANTS Profile. Retrieved March 25, 2008.
- ^ Greene, Edward Lee. 1887. Pittonia 1(2): 29
- ^ Gray, Asa. 1876. Proceedings of the American Academy of Arts and Sciences 11: 75–76 description in Latin, commentary in English
- ^ Calflora taxon report, University of California, Hazardia cana (A. Gray) E. Greene, Guadalupe hazardia, San Clemente Island hazardia, island hazardia
- ^ Flora of North America, Hazardia cana (A. Gray) Greene, 1887. San Clemente Island bristleweed
External links
edit- Calflora Database: Hazardia cana (Guadalupe hazardia, San Clemente Island hazardia)
- Jepson Manual Treatment of Hazardia cana
- Missouri Botanical Garden: herbarium specimen + isotype of Diplostephium canum/Hazardia cana — collected on Guadalupe Island in 1875.
- UC CalPhotos gallery of Hazardia cana images
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