158 IOWA ACADEMY OF SCIENCES. 



Armstrong, September 10, 1882, Professor Shhnek: Johnson 

 county, March 13, 1897, T. E. S.: Council Bluffs, September, 

 1888, Misses Dubai d- Cavanarjh: Council Bluffs, November, 1898, 

 Professor Shhnek. 



18. Barbula fallax Hedw. Rather rare; found, along the 

 roadside on dry clay ground. Johnson county, September 29, 



1896, T. E. S. 



Tribe Grimmie^. 



19. Gri)inina apocarpa Hedw. Common on limestone rocks 

 in early spring. Johnson county, March 13, 1897, T. E. S. 



Tribe ORTHOTRICHEyE. 



20. Orthotrlchinn i^orteri Aust. Not rare; on dry rocks in 

 the spring, associated with the preceding. Johnson county, 

 March 13, 1897, T. E. S. 



21. Orthotrichiori hrachytrichum Schimp. Common on the 

 bark of trees; fruiting in early spring. Johnson county, 

 February 3, 1897, T. E. S. 



22. Orthotrichinn braioiii Bruch. & Schimp. Rare; growing 

 on trees. Pound only in Muscatine county, November 15, 



1897, Shhnek ((■ Savage. 



Tribe Physcomitrie.e. 



23. Piirarnidula tetragona Brid. A very rare species with a 

 limited distribution in the United States; collected only on 

 ledges of quartzite. Lyon county, July, 1897, Professor Shhnek. 



24. Pltyscomltriuni acunihudmn Bruch. & Schimp. Not rare 

 in southeastern Iowa; growing on low ground, exposed to the 

 sunshine. Cedar Rapids, May 15, 1896, and Johnson county, 

 May 20, 1896, Professor Shhnek: Johnson county, March 15, 

 1897, T. E. S.: Pottawattamie county, May, 1897, J. E. 

 Cameron. 



25. Eunaria hijgronietrica Sibth. Common throughout the 

 state; growing on the ground in woods and open places. 

 Johnson county, April 30, 1896; Keokuk, June 2, 1896; Arm- 

 strong, June 30, 1896, and Spirit Lake, August 1, 1896, Pro- 

 fessor Shhnek: Johnson county, March 13, 1897, 7\ E. S.: 

 Decorah, March 24, 1898, P. (\ Myers. 



Tribe Bartramie^. 



26. Bartrantia j)onufornils Jledw. Very common on shaded 

 bluffs bordering streams. Johnson county, April 30, 1S96, 



