156 
E, mutilum L, 
H. majus (Gray) Britton 
H, canadense E.,/^ . . i/ 
H.^is^mulatura^ Bicknell • /tv/ ' 
H. gentianoides. (L.) BSP. 
H, virginicum L. ^ ^ a y. 
ELATINACEAE 
£. 
Elatina americana (Pursh) Arn, (Me., Que.) 
E. triandra Schkuhr (Me.) 
E. minima (Nutt.) Piach. & Meyer. 
tuHi |YvA|Vc CtJ-^T 
CISTACEAE 
Heliantheraura canadense (L.) Miehx. 
