Echinocereus viridiflorus var. viridiflorus
A small cactus with greenish-yellow flowers, found in pinyon/juniper woodland.
Plant habit, Rio Grande Canyon north of Taos, 10 May 2007.
A flower at Rio Grande Canyon, 10 May 2007.
Plant habit at Rio Grande Canyon, 10 May 2007. Note that this plant has no central spines on its areoles, whereas the above plant does.