298 Dr. Smiru on a remarkable Variety of Pedicularis Sylvatic a. 
Chelone barbata on the very same branch with the proper ringent 
ones. Such accidents are frequent in various species of Antirrhi- 
num and Bignonia. They should be kept in mind by all students 
of systematical arrangement, as a warning not to expect that 
our artificial rules can keep pace with the intricacies of nature. 
I remain, &c. 
F E. SuiTH. 
Norwich, February 4, 1809. 
