|Photo by Ned Harris 11/20/2013|
Insect tracks on leaves of a Sphaeralcea species. My guess is Caliche Globe Mallow (S. laxa); but please send me a correction. [I looked again on 12/11/2013 and found tracks on Fendler Globe Mallow (S. fendleri).]
I did a search on Margarethe's site and found this info. (Scroll down for the mallow-eating bugs.)
Make your own tracks to the 4th Avenue Street Fair December 13, 14, & 15 to see (and purchase) Margarethe's Art - she's booth 758. She also has works on display at Tohono Chul's main gallery.