Whorled milkweed
May, W.L.
Whorled milkweed The worst stock-poisoning plant in Colorado - Colorado 1920 - 1-39 p. - Milk, Weed, Plant Colorado Agricultural Experiment Station. Bulletin No. 255 .
Whorled milkweed The worst stock-poisoning plant in Colorado - Colorado 1920 - 1-39 p. - Milk, Weed, Plant Colorado Agricultural Experiment Station. Bulletin No. 255 .