IOWA ACADEMY OP SCIENCES. 
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grasses a special form occurs; stems longer creeping and leaves 
longer acuminate than the last. Johnson county, October, 1896, 
Professor Sliimek. 
60. Bracliytliecium acuminatum Beauv. Common in damp 
woods, on decayed logs. Easily distinguished by its erect 
capsule and rudimentary cilia. Johnson county, October, 
1894, Professor Sliimeh; Johnson county, September 21, 1896, 
T. E. S.; Delaware county, September, 1897, J. E. Cameron; 
Muscatine county, November 15, 1897, Sliimek & Savoge. 
61. Bracliytliecium acuminatum setosum Sulliv. & Lesq. 
Branchlets slender and plumose; leaves longer than those of 
the last; habitat the same. Johnson county, October 17, 1896, 
P E. 8. 
62. Bracliytliecium rivulare Bruch. A large moss growing in 
swamps and very wet places; not common. Muscatine county, 
November 15, 1897, Sliimek S Savage. 
63. Bracliytliecium plumosum Swartz. Rare; growing on 
damp sandstone rocks and on wet ground. Muscatine county, 
November 15, 1897, Sliimek & Savage. 
64. Eurliyncliium Mans Hedw. Not rarely found on moist, 
shaded hillsides. Pedicel very rough. Johnson county, Sep- 
tember 29, 1896, T. E. 8. 
65. Rliyncliostegium serrulatum Hedw. Very common in dry 
woods on the ground. Leaves two ranked. Johnson county, 
May, 1896, Professor Sliimek; Johnson county, October 17, 1896, 
and Henry county, December 28, 1896, T. E. S. 
66. Plagiotliecium sylvaticum Huds. Rare; growing on the 
ground in* deep shade. Johnson county, October 17, 1896, 
T. E. S. 
67. AmMystegium serpens Linn. Common on decayed logs 
or on the ground in damp, shady places; stems delicate and 
densely branching. Johnson county, October 3, 1896, T. E 8.; 
Pottawattamie county. May, 1897, J. E. Cameron; Port Dodge, 
July 5, 1897, Professor Sliimek. 
68. AmMystegium irriguum Hook. & Wils. Not rare on 
wet ground; stems longer and coarser than the last. Johnson 
county. May, 1896, Professor Sliimek; Muscatine county, 
November 15, 1897, Sliimek & Savage. 
69. AmMystegium adnatum Hedw. Commonly found on 
trees or on stones in damp places; rare. Muscatine county, 
November 15, 1897, Sliimek & Savage. 
70. AmMystegium ripariumlAmi. Very common on decayed 
