—30- 

 above description is based. The earliest specimens (Eaton 

 Herb.), first determined by Professor Eaton as Aspidium 

 lonchitis, were collected on the Hayden Yellowstone Expedition, 

 in the Upper Teton Canon of Eastern Idaho, July 28th, 1872. 

 The present known range extends from Washington to Eastern 

 Idaho, south to Utah and Southern California. It has also been 

 collected on "Mount Albert, Lower Canada," 26 July, 1881, by 

 O. D. and J. A. Allen (Eaton Herb.), a notable extension of 

 range, and comparable to that of Pellcea densa. The "Mount 

 Albert" mentioned is in Gaspe county, Quebec. 



Azolla Caroliniana Willd. in Central New York. Re- 

 garding the occurrence of this small and easily overlooked fern- 

 wort in New York State, Torrey, in his Flora, writes: "In 

 slowly flowing waters, island of New York; floating on the 

 waters of Lake Ontario (Pursh) ; Braddock's Bay (Dr. Bradley)." 

 I am now able to report it from the interior of the State. Mr. 

 Henry Warne, of Kenwood, N. Y., collected it several years ago 

 upon one of the slow creeks at the eastern end of Oneida Lake ; 

 and the National Herbarium has lately received specimens from 

 the same locality taken from the surface of the stagnant waters 

 of Black Creek, which drains into Oneida Lake near Sylvan. 

 They were collected by Mr. H. D. House, of Oneida, N. Y., 

 August 8th, 1899. The species may well be looked for at other 

 points along the lake. 



Polystichum munitum imbricans (D. C. Eaton). {Aspidium 

 munitum, var. imbricans D. C. Eaton. Ferns N. Am., 1: 188, PI. 

 XXV, fig. 3. 1879). This variety is to be distinguished from the 

 species by its smaller size, and by the crowded imbricated pinnae 

 which have long cuspidate tips and are set much more obliquely to 

 the rachis than in the type. It is extremely chaffy at the base of 

 the stipes, the scales being narrowly acuminate-lanceolate, often 10 

 lines long, and mostly of a rich glossy chestnut color. The greater 

 portion of the stipe, however, and the lamina are nearly naked, in 

 this respect differing materially from the species, which is usu- 

 ally chaffy throughout. The fronds are mostly heavily fruited, 

 with the sori crowded in dense sub-marginal lines. 



Having recently observed some excellent specimens of this 

 variety, collected in Washington by Mr. J. B. Flett, and noticing 

 Professor Eaton's remark that "it looks like a plant grown in a 

 hot and dry place," I have asked Mr. Flett to describe its habitat 

 and habit. He writes as follows: "It grew on a steep moun- 



