Picradeniopsis oppositifolia

Formerly a Bahia and distinguished from them, as one might expect, by having opposite leaves.

A pseudanthium at Mills Canyon in Kiowa National Grasslands, 22 Sep 2006.

Plant habit at Mills Canyon 22 Sep 2006.

Nearly mature achenes at Mills Canyon, 22 Sep 2006.

Cauline leaves at Mills Canyon, 22 Sep 2006.

Side view of a pseudanthium at Mills Canyon, 22 Sep 2006.