June 24, 2020 by MGNV WebmasterAsclepias_syriaca_Leaves-3_Monarch_Caterpillars_Sep_ELM_800 Monarch caterpillars (Danaus plexippus) on hostplant Asclepias syriaca (common milkweed). Photo © Elaine Mills About MGNV Webmaster Previous Post:Asclepias_syriaca_Leaves-3_Monarch_Caterpillars_Sep_ELM_800