perennial in periodically mowed, grassy meadow-like highway right-of-way. Similar to A. aspera but single stemmed, erect habit shows adaptation to taller prairie grassland of southeastern Great Plains
in sandy swales among Mesquite-Saltbush sand hummocks with annual Palafoxia, Verbesina, Pectis. A sand-loving, rhizomatous perennial long known under the synonym A. arenaria. Now reduced to varietal status under A tomentosa although it appears significantly different from the traditional A. tomentosa var. tomentosa from Arizona and California.
a vine-like, sub-shrubby perennial plant on open stretch of sandy soil in shallow drainage wash draining coastal plain separating low volcanic hills. Sonoran endemic. Early morning photo of flowers just beginning to open.