While touring the Natural History section of the Arizona Historical Society Museum at Papago Park (1300 N. College Ave, Tempe Arizona 85281) I saw fossil specimen (AHS-NH#11646) from Chinle Formation of Holbrook, Navajo County, Arizona USA. It is a Woodworthia arizonica Jeffrey 1910 tree fossil. This plant existed in the Upper or Late Triassic Period.
Images of museum specimen taken October 2014.
Sources to refer to:
JEFFREY, E.C. 1907. Araucariopitys, a new genus of araucarians. Botanical Gazette, 44, 435-444.
JEFFREY, E.C. 1910. A new araucarian genus from the Triassic. Proceedings of the Natural History Society of Boston, 34, 325-332.
Learn more at these sites:
The Late Triassic Schilderia Adamanica and Woodworthia Arizonica Trees of the Petrified Forest National Park, Arizona, USA by G.T. Creber and S.R. Ash
http://www.readcube.com/articles/10.1111/j.0031-0239.2004.00345.x
Pasadena Rock Museum
