Canadensis, Michx. 



balsamea, Marshall. 

 Larix Americana, Michx. 

 Thuja occidentalis, Linn. 

 Juniperus communis, Linn. 



Virgininiana, Linn, 

 var. alpina, Linn. 

 Taxus baccata, Linn., var. Canadensis, Gray. 



ARACE^E. 



Arisaema triphyllum, Torr. 

 Dracontium, Schott. 

 Calla palustris, Linn. 

 Symplocarpus foetidus, Salisb. 

 Acorus Calamus, Linn. 



LEMNACE^]. 



Lemna trisulca, Linn, 

 minor, Linn. 



TYPHACE^E. 



Typha latifolia, Linn. 

 Sparganium eurycarpum, Engelm. 

 simplex, Hudson. 



var. angustifolium, Gray, 

 minimum, Fries. 



NAIADACE^E. 



Naias flexilis, Rostk. 

 Zannichellia palustris, Linn. 

 Potamogeton natans, Linn. 



rufescens, Schrader. 



amplifolius, Tuckerman. 



gramineus, Linn. 



lucens, Linn. 



perfoliatus, Linn. 



compressus, Linn. 



pauciflorus, Pursh. 



pusillus, Pursh. 



pectinatus, Linn. 



ALISMACE.E. 



Triglochin maritimum, Linn., var. elatum, Gray. 

 Scheuchzeria palustris, Linn. 

 Alisma plantago, Linn., var. Americanum, Gray. 

 Sagittaria variabilis, Engelm. 

 calycina, Engelm. 



HYDROCHARIDACE^E. 



Anacharis Canadensis, Planchon. 

 Vallisneria spiralis, Linn. 



ORCHIDACEiE. 



Orchis spectabilis, Linn. 

 Habenaria tridentata, Hook, 

 virescens, Spreng. 



