Helianthus petiolaris

A common plant along roadsides, also occurring in grasslands.

A pseudanthium at Mesilla Bosque State Park, 16 Aug 2008.

Stem with immature pseudanthia, Mesilla Bosque State Park, 16 Aug 2008.

Phyllaries, Mesilla Bosque State Park, 16 Aug 2008.

A pseudanthium in the Mangas Mts., 8/27/05.

Plant habit in the Mangas Mts., 8/27/05.

A cauline leaf in the Mangas Mts., 8/27/05.