Helianthus arizonensis explained

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. Its 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]}

Notes and References

1. http://bonap.net/MapGallery/County/Helianthus%20arizonensis.png Biota of North America Program 2014 county distribution map
2. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066870 Flora of North America, Helianthus arizonensis R. C. Jackson, 1963. Arizona sunflower
3. Jackson, Raymond Carl 1963. Brittonia 15(3): 266