116 MINNESOTA BOTANICAL STUDIES. 



21. Grimmia leucophasa GREV. 



Abundant, on rocks, at Granite Falls (June 13, 14). 

 At Carlton lake, near Montevideo (July 10). 

 Near Ortonville (June 30). 



22. Grimmia pennsylvanica SCHW. 



On rocks, at Granite Falls (June 13, 14). 

 At Cedar lake, near Montevideo (June 18 and July 8). 

 The plants from Cedar lake show hardly any hair points, 

 but agree otherwise with this species. 



23. Hedwigia ciliata viridis SCH. 

 On rocks. 



At Granite Falls (June 14). 

 At Ortonville (June 23). 



At Carlton lake and Cedar lake near Montevideo (July 2-10). 

 Forms approaching the species are found, but Hedivigia cil- 

 iata proper seems rare in the Upper Minnesota valley. 



24. Orthotrichum anomalum HEDW. 



On rocks at Granite Falls (June 13, 14). 

 At Cedar lake, near Montevideo (June 18). 

 This was verified by Mrs. E. G. Britton. 



25. Orthotrichum porteri AUST. 



On rocks associated with O. anomalum. (Determined by 

 Mrs. E. G. Britton.) 



At Cedar lake, near Montevideo (June 18). 

 At Granite Falls (July 14). 



26. Orthotrichum schimperi HAMM. 



On ash and elm trees. (Determined by Mrs. E. G. Britton). 



At Ortonville (June 23). 



At Hartford, west shore of Big Stone lake (June 27). 



27. Encalypta ciliata HEDW. On shaded ground. 

 At Granite Falls (July 13). 



28. Encalypta rhabdocarpa leptodon (BRUCH) LIMPR. 



A form distinct from the species, apparently deserving varie- 

 tal rank, although Husnot (Muscol. Gall., p. 198) refers to it as 

 "forma gymnostoma Jack." Boulay, in Muscinees de la 

 France, p. 313, remarks on this point that "it often happens 

 that in consequence of the extremes of climatic conditions to 



