Plate III 



Fig. 1. Swampy area with colony of swamp milkweed (A^,:/£/>uis nuariuila), Staliou I, d. 

 (Photograph, T. L. Hankinson.) 



Fig. 2. General view of Station \,g, a colony of swamp milkweed {Asclepias iiicarnata) in a 

 ditch parallel to the rails, and of blue stem {Aiidropogon) and drop-seed (Sporobo/us). Photo- 

 graph, T. L. Hankinson.) 



