IOWA ACADEMY OF SCEENCES. 163 



grasses a special form occurs; stems longer creeping and leaves 

 longer acuminate than the last. Johnson county, October, 1896, 

 Professor Shimelx. 



60. Brachi/tJiecium acumiiiafum Beauv. Common in damp 

 woods, on decayed logs. Easily distinguished by its erect 

 capsule and rudimentary cilia. Johnson county, October, 

 1H94, Professor Shimek: Johnson county, September 21, 1896, 

 7'. E. S.: Delaware county, September, 1897, J. E. Cameron: 

 Muscatine county, November 15, 1897, Shimek if- Savage. 



61. Brachi/fheeium acuminatum setosum Sulliv. & Lesq. 

 Branchlets slender and plumose; leaves longer than those of 

 the last; habitat the same. Johnson county, October 17, 1896, 

 T. E. S. 



62. Brachythecium rivulare Bruch. A large moss growing in 

 swamps and very wet places; not common. Muscatine county, 

 November 15, 1897, Shimek d- Savage 



63. Brachythecium pJumosum Swartz. Rare; growing on 

 damp sandstone rocks and on wet ground. Muscatine county, 

 November 15, 1897, Shimek d- Savage. 



64. Eurhynchium Mans Hedw. Not rarely found on moist, 

 shaded hillsides. Pedicel very rough. Johnson county, Sep- 

 tember 29, 1896, T. E. S. 



65. Rhynchostegium serrulatum Hedw. Very common in dry 

 woods on the ground. Leaves two ranked. Johnson county, 

 May, 1896, Professor Shimek: Johnson county, October 17, 1896, 

 and Henry county, December 28, 1896, T. E. S. 



66. P/agiothecium sylvaticum Huds. Rare; growing on the 

 ground in deep shade. Johnson county, October 17, 1896, 

 T. E. S. 



67. Amblystegium 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 S.: 

 Pottawattamie county, May, 1897, -/. E. Cimeroii: Fort Dodge, 

 July 5, 1897, Professor Sltimek. 



68. Amblystegium irriguum Hook. & Wils. Not rare on 

 wet ground; stems longer and coarser than the last. Johnson 

 county. May, 1896, Professor Shimek: Muscatine county, 

 November 15, 1897, Shimek d- Savage. 



69. Amblystegium adnatum Hedw. Commonly found on 

 trees or on stones in damp places; rare. Muscatine county, 

 November 15, 1897, Shimek d- Savage. 



70. Amblystegium riparium Linn. Very common on decayed 



