| 词条 | Hazardia cana |
| 释义 |
|regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |tribus = Astereae |genus = Hazardia |species = H. cana |binomial = Hazardia cana |binomial_authority = (Gray) Greene 1887 |synonyms_ref=[1][2] |synonyms =
|}}Hazardia cana is a rare North American species of shrubs in the daisy family known by the common names Guadalupe hazardia, San Clemente Island hazardia, or simply island hazardia.[3] 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).[4][5][6] Hazardia cana is a bushy shrub reaching {{convert|1.5|-|2|m}} high. It has woolly, glandular herbage of oblong, sometimes finely toothed leaves {{convert|4|-|12|cm}} 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.[7] 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. References1. ^The Plant List, Hazardia cana (A.Gray) Greene 2. ^Tropicos, Haplopappus canus (A. Gray) S.F. Blake 3. ^{{cite web|url=http://plants.usda.gov/java/profile?symbol=HACA6|title=Hazardia cana (A. Gray) Greene Island hazardia|publisher= PLANTS Profile|work=USDA|accessdate=March 25, 2008}} 4. ^[https://www.biodiversitylibrary.org/page/15253493#page/32/mode/1up Greene, Edward Lee. 1887. Pittonia 1(2): 29] 5. ^[https://www.biodiversitylibrary.org/page/4484091#page/83/mode/1up Gray, Asa. 1876. Proceedings of the American Academy of Arts and Sciences 11: 75–76] description in Latin, commentary in English 6. ^Calflora taxon report, University of California, Hazardia cana (A. Gray) E. Greene, Guadalupe hazardia, San Clemente Island hazardia, island hazardia 7. ^Flora of North America, Hazardia cana (A. Gray) Greene, 1887. San Clemente Island bristleweed External links
11 : Astereae|Flora of California|Flora of Baja California|Flora of Mexican Pacific Islands|Natural history of the Channel Islands of California|Natural history of the California chaparral and woodlands|Endangered biota of Mexico|Endangered flora of North America|Plants described in 1876|Taxa named by Asa Gray|Taxa named by Edward Lee Greene |
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