68 Proceedings of the Biological Society of Washington. 



b. Gaultheria canadensis 



137. Lythrum verticillatum 



138. Podalyria australis 



139. Lupinus perennis 



b. Crotolaria sagittalis 



140. Monotropa uniflora 



141. Apocynum cannabinum 



142. Cassia nictitans 



143. Ophrys cernua 



b. " aestivalis 



c. Orchis ciliaris 



d. " psy codes 



e. " lacera 



f. Arethusa bulbosa 



g. " ophiogloss. 

 h. Limodorum tuberosum 



i. Cypripedium parviflorum 

 k. Malaxis liliifolia 



144. Aristolochia serpentaria 



145. Lycopodium complanatum 



b. Asplenium ebeneum 



c. Aspidium thelypteris 



d. Adiantum pedatum 



e. Osmunda regalis 



f. Aspidium asplenioides 



Gaultheria procumbens 

 Decodon verticillatus 

 Baptisia australis 

 Same 



Chamaecrista nictitans 

 Ibidium cernuum 

 " vernale? 

 Blephariglottis ciliaris 



" psy codes 



" lacera 



Same 

 Pogonia ophioglossoides 



Same 



ii 



Liparis liliifolia 



Same 



Same 



Asplenium platyneuron 



Dryopteris thelypteris 



Same 



Same 



Athyrium asplenioides, recently 

 reinstated by Butters as a 

 segregate from ^4. filix-foemina 

 Fide W. R. Maxon. 



