(231)__Najas guadalupensis, commonly known as Southern naiad;

(232)__Nuphar advena, commonly known as yellow pond- lily;

(233)__Nymphaea leibergii, commonly known as pygmy water-lily;

(234)__Omalotheca supina, commonly known as alpine cudweed;

(235)__Omalotheca sylvatica, commonly known as woodland cudweed;

(236)__Ophioglossum pusillum, commonly known as adder's tongue fern;

(237)__Oryzopsis canadensis, commonly known as Canada mountain-ricegrass;

(238)__Osmorhiza berteroi, commonly known as mountain sweet-cicely;

(239)__Oxytropis campestris, commonly known as St. John oxytrope;

(240)__Panax quinquefolius, commonly known as American ginseng;

(241)__Parietaria pensylvanica, commonly known as Pennsylvania pellitory;

(242)__Parnassia glauca, commonly known as grass-of- parnassus;

(243)__Paronychia argyrocoma, commonly known as silverling;

(244)__Pedicularis furbishiae, commonly known as Furbish's lousewort;

(245)__Persicaria vivipara, commonly known as alpine bistort;

(246)__Phegopteris hexagonoptera, commonly known as broad beech fern;