In fact, the "sky islands" of southeastern Arizona and adjacent Sonora are now recognized by the International Union for the Conservation of Nature as one of the great centers of plant diversity north of the tropics.
|Looking from Mt. Lemmon to Tucson in the valley below, with the Santa Rita Mountains in the distance.|
Especially plentiful were Nais Metalmark butterflies on Fendler's ceanothus. The tiny white flowers were also attractive to a collection of other insects including flies, bees, wasps and other butterflies.
Too soon we had reached the parking lot, which was now full, and it was time to sit at the picnic tables having a little lunch while going over our lists and through our field guides.