Asclepias speciosa Torr.

A common species in the eastern United States, somewhat uncommon in the western United States, where it is found in low-elevation cienegas, along roadside ditches, and similar wet habitats.

Plant habit along NM Hwy. 111 north of Vallecitos, Rio Arriba County, New Mexico, 17 Jun 2012.

Inflorescences along NM Hwy. 111, 17 Jun 2012.

Flowers along NM Hwy. 111, 17 Jun 2012.

Flowers along NM Hwy. 111, 17 Jun 2012.

Flowers along NM Hwy. 111, 17 Jun 2012.

A longitudinally sectioned flower along NM Hwy. 111, 17 Jun 2012.

Plant habit at Wagon Mound Cienega, Mora County, New Mexico, 7 Aug 2011.

Immature fruit at Wagon Mound Cienega, 7 Aug 2011.

An upper cauline leaf at Wagon Mound Cienega, 7 Aug 2011.