594 



8. Alisiiia Plantago-aquatica L. 



In reed swamp ; common. Confined mostly to the very wet 

 places. 



Grauiineae 



9. P allien )!i ca pill are L. 



Along ditches, stream-banks, etc. Very common in late sum- 

 mer. 



10. Bchinochloa cnisgalli (L.) Beau v. 



Prominent in late summer in open or mown areas. 



11. Lccrsia oryzoides (L.) Sw. 



In reed swamp and swamp meadow ; frequent. 



12. Plialaris armidinacea L. 



In the outer reed swamp, also in swamp meadow ; abundant. 

 Yapp, ('08, p. 67) has pointed out that the leaves of Phrag- 

 rnitcs, because of the slippery inner surface of their sheath, can 

 easily turn about so as to stream with the wind. The same was 

 found at Skokie Marsh to be true, though in a lesser degree, of 

 Phalaris armidinacea. 



13. Phlcum pratcnse L. 



In the meadow, where it was more or less frequent, probably 

 because of its occasional cultivation in certain fields near the 

 marsh. 



14. Alopecurus geuicitlatiis L. 



In the swamp meadow and outer parts of the reed swamp, 

 west of Glencoe ; sparsely scattered. 



15. Agrosfis alba h. 



Common in many parts of the meadow ; occasional in the 

 more open parts of the swamp meadow. 



16. Agrostis percnnans (Walt.) Tuckerm. 



In meadow and swamp meadow ; abundant, especially west 

 of Glencoe. 



17. Calamagrostis canadensis (Michx.) Beauv. 



The dominant grass of the swamp meadow and frequent in 

 the reed swamp; forms the bulk of the hay obtained in Skokie 

 Marsh. 



18. Sphenopholis pollens (Spreng.) Scribn. 



In the swamp meadow ; scattered in very small patches. 



