I found many specimens of the dried seed pods along a bank, and several of the pods were still attached to the vines. It was the middle of August and the pods were all dried and split open to varying degrees. The pods are generally as large as my closed fist with long spikes.
Scores of these underfoot on the damp trail.
In a damp field, 8000-9000ft
Dry area near trail, between 8000-9000 ft
The only one listed in my plant guide is M. racemosum, but it doesn't look like the one we have in the Midwest
Shrub in rocky mountain pass, ~8000'