1921] Knowlton, — Herbarium of Rev. W. P. Alcott 47 



E. fluviatile intermedium A. A. Eaton in Gilbert, List N. Am. 

 Pterid. 8, 26 (1901) appears, from the scanty material at hand, to 

 be only stunted f. verticillatum. 



4. Forma polystachium (Bruckn.) Doell, FI. Baden, 65 (1857), 

 where wrongly ascribed to Lejeune, Fl. Spa. ii. 274 (1813). E. 

 polystachium Bruckn. Fl. Neobrand. Prod. 63 (1803). E. limosum 

 polystachion Seringe in Vaucher, Monog. des Preles, 44 (1822). 

 E. limosum, 0. Candelabrum Hook. Fl. Bor.-Am. ii. 269 (1840). E. 

 limosum, f. polystachyum A. Br. Am. Journ. Sci. xlvi. 86 (1844). E. 

 Heleocharis, f. polystachyum Klinge, Arch. Naturf. Soc. Dorpat, ser. 

 2, viii. 411 (1882). E. Heleocharis, A. fluviatile, f. polystachyum Aschers. 

 & Graebn. Syn. Mitteleur. Fl. 136 (1896). E. fluviatile, var. poly- 

 stachyum A. A. Eaton, Fern Bull. x. 74 (1902). E. limosum, f. 

 fluviatilis, subf. polystachya Dalla Torre & Sarntheim, Fl. Tirol, 74 

 (1906). — Specimens have been seen from Nova Scotia, Maine and 

 Michigan: there are reports from Manitoba ($. Candelabrum Hook.), 

 Oregon (Am. Fern Journ. ix. 104) and Washington (Fern Bull. x. 

 74). 



Gray Herbarium. 



Herbarium of Rev. W. P. Alcott. — On a recent visit to the 

 Peabody Academy of Sciences in Salem I was much pleased to find 

 there the entire herbarium of the late Rev. W. P. Alcott. This is a 

 recent acquisition which is of great value. Mr. Alcott built up a 

 general American collection of a few hundred sheets by collecting and 

 exchange, and he had several other smaller collections from different 

 parts of the world. 



Most interesting of all to the local student is Mr. Alcott' s collec- 

 tion of wool-waste plants, which he made during his pastorate at 

 North Chelmsford, Massachusetts. There are many references to 

 these plants in Dame'& Collins's Flora of Middlesex County (1888). 

 Now that this collection is accessible, practically all the citations in 

 this Flora can be traced to actual specimens. Dr. C. W. Swan's 

 herbarium at Yale University includes many of these Middlesex 

 plants, and the others are in the Gray Herbarium or in that of the 

 New England Botanical Club.— Clarence H. Knowlton, Hingham, 

 Massachusetts. 



