48 



1040 Potainogeton prgelongus, Wolf. 

 10 il Potamogeton luceas, L- 



1042 var fluitacs. 



1043 Potamogeton nalans, 



1014. Potamogeton heteroplyllus^ Schreber. 



ALISMACE^. 



1045 TriglocLin palustre, L. 



1046 TriglocLin maritimum, L. 

 1^j47 Sclieuchzeria palustrisj L, 



1048 Alisraa plantago, L., var Americans rn. 



T 



1049 Eeliinodorus parvulus, Engelm. 



1050 Sfigittaria variabilis, Engelm. 



1051 Sagittarla Leterupbylla, Pursb. 



1052 Sagittaria simplexj Pursh. 



HYDEOCHARIDACE^. 



1053 Anacbarls Canadensis, Plancbon. 



J 054 Vallisneria spiralis, L. 



OKCHIDACE^- 



1055 Orchis spectabilis, L, 



1056 Gymnadenia tridentata, Lind. 



1057 Platantheraobtusata, Lind- 



1058 Platautbera orbiculata, Lind. 



1059 Platanthera Hookeri, Lind. 



1060 Platanthera bracteataj Torr, 



