IOWA ACADEMY OP SCIENCES. 
159 
Professor Shimek; Johnson county, October 3, 1896, T. E. S.; 
Delaware county, September, 1897, J. E. Cameron; Muscatine 
county, November 15, 1897, ShimeJc & Savage. 
Tribe Brye^. 
27. Leptohryum ptjriforine 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, SJiimek S 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 Sliimek; Johnson county, October 3, 1896, T. E. 
S.; Pottawattamie county. May, 1897, J. E. Cameron. 
29. Brijum 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 county, 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 S 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, 18.96, 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 Sliimek; Delaware 
county, September, 1897, J. E Cameron. 
33. Minium afine 'Blmndi. Not common; it has been collected 
at but one point in the state. Decorah, March 24, 1898, P. C. 
Myers. 
34. Aulacomnium heterostiehum Bruch. & Schimp. A beauti- 
ful species, growing in thick tufts on the sandy hillsides at 
Wildcat Den. Muscatine county, November 15, 1897, Sliimek & 
Sav'age. 
35. Timmia meg a politana 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. 
