Arctomecon californica (*)
Arctomecon californica Torr. & Frem.
* Report of the Exploring Expedition to the Rocky Mountains in the year 1842 312, t. 2. 1845
Data compiled from various sources by Mark W. Skinner. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
Arctomecon californica is a species of poppy known by several common names, including California bearpoppy, Las Vegas bearpoppy, golden bearpoppy, and yellow-flowered desert poppy.
Arctomecon californica is native to the eastern Mojave Desert: in areas around Las Vegas, Nevada such as Tule Springs; the Lake Mead area; and in extreme northwestern Arizona. It is also known from a single location in Washington County, southwestern Utah. 
Arctomecon californica is a Perennial herb found in Creosote bush (Larrea tridentata) habitats, in barren shales, at 500–1,000 metres (1,600–3,300 ft) in elevation. 
The plant flowers in mid spring with deep yellow petals from large buds on tall 1-3 feet branching inflorescences. Fruiting occurs in early summer. 
1. ↑ http://plants.usda.gov/java/profile?symbol=ARCA4 USDA
Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License