| 词条 | Helianthus arizonensis |
| 释义 |
|regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |genus = Helianthus |species = H. arizonensis |binomial = Helianthus arizonensis |binomial_authority =R.C.Jacks. }}Helianthus arizonensis is a North American species of sunflower known by the common name Arizona sunflower. It is native to the States of Arizona and New Mexico in the southwestern United States.[1]Helianthus arizonensis is a perennial herb up to 30 cm (12 inches) tall. Leaves have no hairs. One plant produces 1-7 flower heads, each head with 10-14 yellow ray florets surrounding at least 30 yellow disc florets.[2][3] References1. ^Biota of North America Program 2014 county distribution map {{Taxonbar|from=Q12212013}}{{Heliantheae-stub}}2. ^Flora of North America, Helianthus arizonensis R. C. Jackson, 1963. Arizona sunflower 3. ^Jackson, Raymond Carl 1963. Brittonia 15(3): 266 3 : Helianthus|Flora of the Southwestern United States|Plants described in 1963 |
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