Mentzelia albicaulis

A common plant in dry, rocky habitats. At the name suggests, it has white stems. Mentzelia montana is similar, but has toothed or lobed, rather than entire, bracts.

An inflorescence on Kitt Peak, at the north end of the Baboquivari Mountains, Arizona, 15 May 2008.

Plant habit on Kitt Peak, 15 May 2008.

Seeds, from a plant seen on Kitt Peak, 15 May 2008.

Closer view of a flower on Kitt Peak, 15 May 2008.

A flower in Cooke's Range, 4/16/05.

Cauline leaf and emerging inflorescence in Cooke's Range, 4/16/05.