This plant with the striking green foliage with red stems and small white flowers with 5 petals was growing on the rock wall on the Hidden Canyon Trail in Zion National Park. It was early May. What is it?
Nuttall's linanthus, Leptosiphon nuttallii...? http://www.birdandhike.com/Veg/Species/Forbs-P/Leptos_nut/_Lep_nut.htm http://www.americansouthwest.net/utah/zion/linanthus.html