614 



Plate XC 



Fig. 9, (/. Ran It lie 11,1 us dclt^hiiiifoHus; h, Nymphaca advena; c, Siiiin cicntac-^ 

 folium; d, Typha latifolia; c. Polygonum hydropipcroidcs. July, igii. 

 Fig. 10. a. Acorns Calamus; b, Polygonum Muhlenhcrgii; c, Galium Claytoni. 

 July, 191 1. 



Plate XCI 



Fig. II. a, Boltonia asteroidcs; b, Pcnthorum sedoidcs; c. Proserpinaca palustris; 



d, Ludvigia pdlustris; c, Callitriche palustris. July, 191 1. 

 Fig. 12. a, Asclepias incarnata; b, Pea pratensis; c, Agrostis alba; d, Equisetum 



arvense; e, Acalypha virginica; f, Elcocharis palustris. July, 191 1. 



Plate XCII 



Fig. 13. a, Lycopus amcricanus; b, Viola conspcrsa; c, Viola cuciillaia; d. Iris 



versicolor. July, 191 1. 

 Fig. 14. One of the broad drainage ditches southwest of Skokie Marsh (west of 



Kenilworth). Sparganium eurycarpuni abundant on bed. June, 1912. 



Plate XCI 1 1 



Fig. 15. Looking east along the county line (Braeside) road, from Skokie Stream. 



Swamp meadow on either side and Ulnius amcricaua conspicuous in the 



distance. May, 1912. 

 Fig. 16. Looking west along the road just north of the county line (Braeside) 



road. One of the ditches. May, 1912. 



Plate XCIV 



Fig. 17. Looking north from the bridge west of Winnetka ; showing a basin 

 (largely artificial) in which part of the water from the marsh collects, 

 flowing thence southward through the ditch visible in the foreground. 

 June, 1912. 



Fig. 18. Looking south in the west part of Skokie Marsh, west of Glencoe ; show- 

 ing the dense growth of sedges, grasses, etc., of the swamp meadow. 

 June, 1912. 



Plate XCV 



Fig. 19. Looking south over the swamp meadow, west of Glencoe; showing the 

 later growth of herbs after the mowing of the tall grasses and sedges. 

 August, 1911. 



Fig. 20. View west of Glencoe ; the reed swamp at this point separated from 

 forest by only about 15 m. June, 1912. 



Plate XCVI 



Fig. 21. View in swamp meadow, west of Ravinia ; showing one of the charac- 

 teristic thickets of Salix longifolia. June, 1912. 



Fig. 22. Swamp meadow west of Glencoe, with Ulmus amcricaua, a conspicuous 

 tree in the landscape of the marsh, along ditch, stream, and marsh 

 border. June, 1912. 



Plate XCVII 



Fig. 23. View west of Highland Park, where Skokie Stream widens out but is 

 filled with a dense growth of Sparganium eurycarpuni, etc. The stream 

 is bordered with Salix sp., etc. (on reader's left) and Populus trcmu- 

 loides, Fraxinus nigra, etc. (at right). June, 1912. 



Fig. 24. Skokie stream west of Glencoe, looking south ; showing" the numerous 

 plants that grow rapidly upon the stream bed as the water subsides. 

 June, 1912. 



