21 



No other place of an occurrence in Ohio of Cetraria 

 islandica (L,.) Ach. is known to the author, notwithstand- 

 ing careful researches made by him, nor did he find the 

 L,ichen enumerated in E. E. Bogue's List of Ohio Lich- 

 ens. Considering, therefore, its thus proven utmost rarity 

 in Ohio and the sterile state of all the specimens found 

 in Cuyahoga county, as also the fact that it inhabits Arctic 

 America and alpine districts of North America, the author 

 is induced to believe that the former big ice sheet of North 

 America, with its immense glaciers, caused that Lichen to 

 appear there, that numberless specimens of it did then grow 

 in that place and that the few patches now found are nothing 

 but relics and accidental survivors from the glacial days of 

 Ohio. 



GRASSES OF ASHTABULA COUNTY, O. PART L 



BY SARA F. GOODRICH, GENEVA, O. 



Agropyron repens (L.) Beauv. 



Agrostis alba L. 



Agrostis alba vulgaris (With.) 



Thurb. 

 Agrostis hiemalis (Walt.) B. S. V. 

 Agrostis perennans (Walt.) Tuck- 



erman. 

 Anthoxanthum odoratum L,. 

 Bromus racemosus L. 

 Bronius secalinus L. 

 Calamagrostis canadensis (Michx.) 



Beauv. 

 Cenchrus tribuloides L. 

 Chamaeraphis glauca (L.) Kuntze. 

 Chaniaeraphis viridis (L.) Porter. 

 Cinna arundinacea L. 

 Dactylis glomerata L. 

 Danthonia spicata (L.) Beauv. 

 Eatonia pennsylvanica (DC.) A. 



Gray. 

 Elymus canadensis L,. 

 Elymus canadensis glaucifolius 



(Willd.) Terr, 



Eragrostis caroliniana (Spreng). 



Scrib. 

 Eragrostis hypnoides (Lain.) B. S. 



P. 

 Eragrostis major Host. 

 Festuca elatior L. 

 Festuca elatior pralensis (Iluds.) 

 . Hack. 



Festuca nutans' Willd. 

 Festuca octoflora Walt. 

 Homalocenchrus or^zoides (L.) 



Poll. 

 Homalocenchrus virginicus. 



(Willd.) Britt. 

 Hordeum jubatum L. 

 Hystrix hystrix (L.) Millsp. 

 Lolium perenne L. 

 Muhlenbergia diffusa Schreb. 

 Muhlenbergia mexicana (L.) Trin. 

 Muhlenbergia sylvatica (Torr.) A. 



Gray. 

 Panicularia fluitans (E.) Kuntze. 



