57 



SYMPLOCARPUS 



foetidus, Salisb. 



LEMNACE/E. 



LBMNA 



minor, L. 

 polyrrhiza, L. 

 trisulca, L. 



WOLFPIA 



Brasiliensis, Weddell. 

 Columbiana, Karsten. 



ALISMACE/E. 



ALISMA 



Plantago, L., var. Americanum, 

 Gray. 



DAMASONITJM 



Californicum, Torr. 



ECHINODORUS 



parvulus, Engelm. 



SAGITTARIA 



calycina, Eng., var. spongiosa, 



Engelm. 



graminea, Pursh. 

 heterophylla, Pursh. 



var. rigida, Engelm. 

 variabilis, Eng., var. angustifolia, 

 Engelm. 



var. diversifolia, Engelm. 



var. gracilis, Engelm. 



var. hastata, Engelm. 



var. latifolia, Engelm. 



var. obtusa, Engelm. 



var. pubescens, Engelm. 



NAIADAGE/E. 



LILJEA 



subulata, HBK. 



NAIAS 



flexilis, Rostk. & Schmidt, 

 var. robusta, Morong. 



PHYLLOSPADIX 



Scouleri, Hook. 



POTAMOGBTON 



amplifolius, Tuckerm. 

 Claytonii, Tuckerm. 

 gramineus, L. 



var. graminifolius, Fries. 



var. heterophyllus, Fries. 



var. maximus, Morong. 

 hybridus, Michx. 

 lonchites, Tuckerm. 

 lucens, L. 

 marinus, L. 



var. Macounii, Morong. 

 mucronatus, Schrad. 

 natans, L. 



var. prolixus, Koch. 

 Oakesianus, Robbins. 

 obtusifolius, M. & K. 

 pauciflorus, Pursh. 



var. Niagarensis, Gray. 

 pectinatus, L. 

 perfoliatus, L. 



var. lanceolatus, Robbins. 

 prselongus, Wulf. 

 pusillus, L. 



var. panormitanus, Biv. 



var. vulgaris, Fries. 

 Robbinsii, Oakes. 

 rufescens, Schrad. 

 rutilans, Wolfgang. 

 Spirillus, Tuckerm. 

 Vaseyi, Robbins. 

 Zizii, M. & K. 

 zosterifolius, Schum. 



RUPPIA 



maritime, L. 



