296 



The Ohio Naturalist. 



[Vol. V, No. 5, 



mentioned here. Nephrolepis exaltata, a cultivated species, 

 sends out runners, which often take root at the end and thus form 

 a new plant. 



Onlv two of our Pteridophytes are annuals, Selaginella apus 

 and Azolla caroliniana. The rest are perennial; of these a large 

 number are evergreen, the aerial portion persisting and remaining 

 green throughout the winter. The following list includes the 

 Pteridophytes which belong to the evergreen class: 



Polypodiuni vulgare. 



polypodioides. 

 Pellcea atropurpurea. 

 Asplenivim pinnatifidum. 

 " ebenoides. 



" platyneuron. 



" trichonianes. 



" ruta-muraria. 



montanum. 

 Caniptosorus rhizophyllus. 

 Polysticlium acrostichoides. 

 Dryopteris cristata. 



" " clintoniana. 



marginalis. 

 spinulosa. 



Classifying the Ohio Pteridophytes according to habitat, we 

 have the following list: 



1. Those growing in wet marshes or swamps with or without 



abundant shade. 



Botrychium matricaria'folium. Woodwardia virginica. 



lanceolatum. Dryopetris noveboracensis. 

 Osmunda cinnamomea. " cristata. 



regalis. " spinulosa intermedia. 



clavtoniana. " " dilatata. 



Dryopteris spinulosa intermedia 



dilatata. 

 Woodsia obtusa. 

 Equisetum robustum. 

 hyemale. 

 " kevigatum. 



" variegatum. 



scirpoides. 

 Lycopodium lucidulum. 

 inundatum. 

 " obscurum. 



" annotnium. 



" clavatum. 



pomplaiiatum. 

 Selag'nella rupestris. 



2. Those growing on the 



more or less moist: 



Ophioglossum vulgatum. 

 Botrychium matricaritefolium. 



lanceolatum. 

 Adiantum pedatum. 

 Asplenium platyneuron. 

 Athyrium thelypteris. 



filix-firmina. 

 Dryopteris noveboracensis. 



goldieana. 



marginalis. 

 " spinulosa. 



ground in rich woods and thickets 



Phegopteris phegopteris. 



hexagonoptera. 



" dryopteris. 



Filix fragilis. 

 Woodsia obtusa. 

 Equisetum scirpoides. 

 Lycopodium luciduluin. 

 obscurum. 



" annotinum. 



" clavatum. 



" complanatum. 



3. Those growing in moist rocky ravines or rocky places are: 



Botrvt'liium virginianum. Dryopteris marginalis. - ■ 



AVoodsia ()l)tusa. As])lenium angvistifolium. 



Filix ])ulbifera. Phegojiteris i)liego])leris. 

 ■■ fragilis. " dryopteris. 



