Just a half hour drive from downtown Tucson a wilderness awaits in the Rincon Mountains of Saguaro National Park on the Tanque Verde Ridge Trail. 
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The riparian woodland where we were hiking is around 6,000 ft. in elevation and I think that may be the upper limits of the...
If I had wobbled up any higher on that rocky slope I may or may have not fallen by a ragged rock flower. It...
I neglected to mention that milkweeds are no longer in their own family Asclepiadaceae, but have now been included in the dogbane family Apocynaceae....
