427 
428 
429 
ai apes 
431 
Greenei Morong 
hyperboreum Laest. 
minimum Fries 
natans L, 
simplex. Huds. 
432 angustifolium (Michx.) 
Engelm. 
433 multipedunculatui Morong 
POTAMOGETONACEAE 
434 
435 
436 
437 
438 
439 
Potamogeton 
440 
441 
442 
443 
444 
445 
446 
447 
448 
449 
450 
451 
452 
453 
454 
455 
456 
457 
458 
sry 
Zostera 55 
latifolia Morong 
(Z. Pacifica Wats.) 
marina L, 
minor (Carol.) Nolte 
Oregana Wats. 
Phyllospadix 56 
Scouleri Hook. 
Torreyi Wats. 
58 
alpinus Balbis 
(P. rufescens Schrad.) 
amplifolius Tuckerman 
confervoides: Reichb. 
(P. Tuckermant Robbins) 
crispus L,. 
Curtissi1 Morong 
diversifolius Raf. 
(P. hybridus Michx.) 
multidenticulatus Morong 
trichophyllus Morong 
Faxoni Morong 
filiformis Pers. 
occidentalis (Robbins) 
Morong 
Macounii Morong 
foliosus Raf. 
(P. pauciflorus Pursh) 
Californicus Morong 
Niagarensis (Tuckerman) 
Morong 
Friesii Rupr. 
geminiparus (Robbins) Morong 
heterophyllus Schreb. 
graminifolius (Fries) 
Morong 
minimus Morong 
480 
myriophyllus (Robbins) 
Morong 
Hillii Morong 
Ilinoensis Morong 
interruptus Kitaibel 
lateralis Morong 
latifolius (Robbins) Morong 
lonchites Tuckerman 
(P. fluztans Roth) 
Noveboracensis Morong 
lucens L. 
Connecticutensis Robbins 
marinus L, 
mucronatus Schrad. 
Mysticus Morong 
natans L,. 
Nuttallis, (CSS: 
(P. Pennsylvanicus Cham.) 
Cayugensis Wiegand. 
6 Oakesianus Robbins 
obtusifolius Mert. & Koch 
pectinatus L, 
perfoliatus L. 
Richardsonii A. Bennett 
(P. perfoliatus var. lanceolatus) 
481 
482 
483 
484 
485 
486 
487 
488 
489 
490 
491 
492 
493 
494 
Ruppia 
praelongus Wulf. 
pulcher Tuckerman. 
pusillus L. 
Panormitanus (Biv.) 
Morong 
polyphylus Morong 
Sturrockii A. Bennett 
Robbinsii Oakes 
rutilus Wolfg. 
spathulaeformis (Robbins) 
Morong 
Spirillus Tuckerman 
Vaseyi Robbins 
Zizii Roth 
Methyensis (A. Bennett) 
Morong 
zosteraefolius Schum. 
59 
495 curvicarpa Aven Nelson 
496 maritima L. 
497 occidentalis Wats. 
498 pectinata Rydb. 
