Heartleaf Milkweed, Purple Milkweed
Asclepias cordifolia
Synonym: Gomphocarpus cordifolius
Purple milkweed as seen along Forest Service Road 4201, Siskiyou National Forest............July 15, 2012.
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Close-ups of the inflorescence and pod of purple milkweed as seen along Forest Service Road 4201, Siskiyou National Forest............July 15, 2012. Note the monarch caterpillars which were munching on the pods and flowers.
Paul Slichter