{y{j SUPPLEMENT. 



Spiraea opulifolia, L. 

 Stachys aspera, Michx. 



var. glabra, Gray. 

 Stylophorum diphyllum, Nutt. 

 Thalictrum purpurascens, L. 

 Thaspium aureum, Nutt. 

 Thasphium trifoliatum, Gray. 

 Trillium erectum, L. 

 Trillium nivale, Ridd. 

 Verbena officinalis, L. ? 

 Vibernum acerifolium, L. 

 Viola blanda, Willd. 

 Viola canina, L. 



var. sylvestris, Regel. 

 Xanthium spinosum, L. 

 Zizia integerrima, DC. 

 Zygadenus glaberrimus, Michx. 



SERIES 11. 

 CRYTOGAMOUS or FLOWERLESS PLANTS. 



FILICES. 

 Pteris aqilina, L. 



MUSCI. 



Barbula convoluta, Hedw. 



Bryum caespiticium, L. 



Bryum capillare, Hedw. • 



Fissidens decipiens. 



Hypnum plumosum, Eu. Bry. 



Schistidium apocarpum, Br. and Sch. 



