Hymenothrix wislizeni

{{Short description|Species of flowering plant}}

{{Speciesbox

| image = Hymenothrix wislizeni.jpg

| genus = Hymenothrix

| species = wislizeni

| authority = A.Gray 1849

}}

Hymenothrix wislizeni, the Trans-Pecos thimblehead,{{PLANTS|id=HYWI|taxon=Hymenothrix wislizeni|accessdate=3 August 2015}} is a North American species of flowering plant in the daisy family. It grows in northwestern Mexico (Baja California, Sonora, Chihuahua) and the southwestern United States (far western Texas, Arizona, New Mexico).[http://bonap.net/MapGallery/County/Hymenothrix%20wislizeni.png Biota of North America Program 2014 county distribution map][http://swbiodiversity.org/seinet/taxa/index.php?taxon=3988 SEINet, Southwestern Biodiversity, Arizona chapter]

Hymenothrix wislizeni is an annual herb up to {{convert|70|cm|in|abbr=on}} tall. Each head has 15-30 yellow or cream-colored disc flowers surrounded by 8-12 yellow ray flowers.[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=220006670 Flora of North America, Hymenothrix wislizeni A. Gray, 1849. ][https://www.biodiversitylibrary.org/page/14225869#page/114/mode/1up Gray, Asa. 1849. Memoirs of the American Academy of Arts and Science, new series 4(1): 102]