_Lycopodium Sitchense_ Rupr. In pass between Nipple Top and Mt. Colvin and on side of Mt. Marcy, _Professor Peck_. Alpine and rare. _Lycopodium tristachyum_ Pursh. Cold Spring Harbor, L. I., _Prof. F. E. Lloyd_; Ray Brook, Essex Co., Caroga, Fulton Co., _Professor Peck_. Alden Creek, _Gilbert_. Infrequent. Salviniaceae. _Azolla caroliniana_ Willd. Floating on water. Frequent. Cayuga Lake, Black Creek, _Professor Peck_; in all side waters of Lake Ontario, _Paine_. Selaginellaceae. _Selaginella apus_ Spring. Wet banks and pastures. Uncommon. Cedar Lake, Herk. Co., _Paine_; borders of Rome swamps, _Kneiskern_; head of Oneida Lake, _Haberer_; Unadilla, _Brown_. _Selaginella rupestris_ Spring. On dry open rocks. Rather scarce. Little Falls, _Paine_; Adirondacks. _Professor Peck_; Washington Heights, _W. W. Denslow_. Plentiful in the extreme southeast, _Clute_. FERNWORT NOTES—IV. By Willard N. Clute. Nephrodium Molle in Florida.—Mr. James H. Ferriss recently called my attention to specimens of _Nephrodium molle_ received from Florida with the suggestion that this species might be native to the State. On this point, Reasoner Brothers, the well-known plant dealers, have written him that they no longer grow the fern since it is abundant in a wild state and easily obtained when wanted. There seems to be no reason why the species should not occur in Florida, since _Nephrodium patens_, a close ally, is common there; but as _N. Molle_ is not listed from the United States, we publish this note in the hope of drawing out further information about it and of ascertaining if possible whether _Molle_ is actually native, or only a well naturalized escape. Superficially, _molle_ and _patens_ are so very much alike that it is very easy to confuse them. The venation, however, is a sufficiently distinct feature. In _patens_ the basal veins in each pinnule run to the sinus, uniting at, or just below, it; in _molle_ they unite at some distance from the sinus from whence a single vein runs to the sinus. According to Jenman, _patens_ has a creeping horizontal rootstock with the fronds arranged in two lines along it, while _molle_ has an erect rootstock. The fronds of the latter are also softer and thinner.