''Hymenoxys subintegra'' is a North American species of flowering plant in the
daisy family
The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...
known by the common name Arizona rubberweed. It has been found only in the states of
Arizona and
Utah in the southwestern United States. Many of the populations lie inside
Grand Canyon National Park
Grand Canyon National Park, located in northwestern Arizona, is the 15th site in the United States to have been named as a national park. The park's central feature is the Grand Canyon, a gorge of the Colorado River, which is often consider ...
, others in
Kaibab National Forest.
''Hymenoxys subintegra'' grows in open areas, generally at the edges of forests at elevations of 2100–2800 meters (7000–9300 feet). It is a perennial herb up to 60 cm (2 feet) tall. One plant can produce 10–85 flower heads in a branching, flat-topped array. Each head has 10–16 yellow ray flowers and 50–100 tiny yellow disc flowers.
[Flora of North America, ''Hymenoxys subintegra'' Cockerell, 1904. Arizona rubberweed ]
/ref>Cockerell, Theodore Dru Alison. 1904. Bulletin of the Torrey Botanical Club 31(9): 480–481
/ref>
References
{{Taxonbar, from=Q15587302
subintegra
Flora of Arizona
Flora of Utah
Grand Canyon National Park
Plants described in 1883
Flora without expected TNC conservation status