IOWA ACADEMY OF SCIENCES. 159 



Professor SJdmek: Johnson county, October 3, 1896, T. E. S.: 

 Delaware county, September, 1897, J. E. Cameron; Muscatine 

 county, November 15, 1897, Shunek d- Savage. 



Tribe Brye^. 



27. Lej)tobnjuiii piir'ifor}ne Schimp. Not rare; a very deli- 

 cate form growing on the ground or damp rocks. Johnson 

 county, March 13, 1897, T. E S.: Muscatine county, November 

 15, 1897, Shimek & Savage. 



28. Bryum intermedium Brid. Very common everywhere, 

 growing on rocks or on the ground. Johnson county, May 20, 

 1895; Cedar Rapids, May 15, 1896, and Mason City, July 20, 

 1896, Professor Shimek: Johnson county, October 3, 1896, T. E. 

 S.; Pottawattamie county. May, 1897, J. E. Cameron. 



29. Briium argenteum Linn. Common on low, sandy ground 

 near streams, sometimes occurring on rocks. Johnson county, 

 September 22, 1896, and March 13, 1897, T. E. S. 



30. Bryum argenteum lanatum Bruch. & Schimp. Branches 

 thicker than the preceding, with whiter leaves; capsule more 

 nearly spherical. Johnson count7, September 26, 1896, T. E. S. 



31. Bryum nutans Schreb. Not common; growing on the 

 sandy hill-sides near Wildcat Den. Muscatine county, Novem- 

 ber 15, 1897, Shimek d- Savage. 



32. Minium cuspidatum Hedw. One of our most common 

 species; growing in shady woods at the base of trees. Keo 

 kuk, July 5, 1897; Johnson county. May 20, 1896, and Mason 

 City, July 7, 1896, Professor Shimek; Johnson county, Septem- 

 ber 26, 1896, T. E. S.; Pottawattamie county, May, 1897, J. E. 

 Cameron; Lyon county, July, 1897, Professor Shimek; Delaware 

 county, September, 1897, J. E Cameron. 



33. Minium affine Bland. Not common; it has been collected 

 at but one point in the state. Decorah, March 24, 1898, P. C. 

 Myers. 



34 Aulacomniu)n heterostichuin Bruch. & Schimp. A beauti- 

 ful species, growing in thick tufts on the sandy hillsides at 

 Wildcat Den. Muscatine county, November 15, 1897, Shimek <l'- 

 Savage. 



35. Timmia megapo/itana Hedw. Easily distinguished by its 

 calyptra persisting near the top of the pedicel; common; on 

 ground. Johnson county, May 20, 1896, Professor Shimek; John- 

 son county, April, 1897, T. E S. 



