Pteridophyten. 49 



Robinson, B. L, Lycopodiam clavatum, var. monostachyon in 

 Northern Maine. (Rhodora. III. p. 237— 238. Sept. 1901.) 



This one-spiked variety is considered to be descended from a recent 

 2-spiked ancestor, and occasional 2-spiked individuals are recorded. 



Trelease. 



Metcalf, H. , Notes on the ferns of Maranocook, 



Maine. (Rhodora. III. p. 236—237. Sept. 1901.) 



A list of eleven species, supplementary to a list published by Da- 

 venport in Vol. I. of the same Journal. Trelease. 



Gilbert, B. D., Notes o n Lycopodiam tristachyum Prush 

 {L. chamaecyparissus A. Br.). (Jorreya. I. p. 117 — 119.) 



Differential organographic and biological characters, as contrasted 

 with L. complanatnm. Trelease. 



Davenport, G. E., Miscellaneous notes on New Eng- 

 land ferns and allies. (Rhodora. III. p. 223—225. 

 Sept. 1901.) 



Asplenium ebeneum Hortonae is reported from Maryland and Arkansas, 

 in addition to the original Station in Vermont; and the erect and appa- 

 rently inner fertile fronds of Osinunda are said to be of origin inferior 

 to the seemingly outer sterile ones, whereas in Striithiopteris the 

 reverse is true. Trelease. 



Davenport, G. E., Miscellaneous notes on New Eng- 

 land ferns, II. (Rhodora. III. 266—270. November 1901.) 



A discussion of the generic Status of Athyrium and of the form and 

 ciliation of the indusia of A. filix-foemina. Trelease. 



Gilbert, B. D., Working list of North American Pterido- 

 phytes (northof Mexico), togetherwith descriptions 

 of a number ofvarieties not heretofore published. 

 Published for the editor by L. C. Chields & Son. Utica, N. Y. 

 1901. 



In this list, families, genera, species and varieties are ar- 



ranged alphabetically, the nomenclature is conservative, and 



even the less marked varietal forms are included. 



Descriptions are given of Equisetum arvense diffusum A. A. Eaton, 

 E. fluviatile intermedium A. A. Eaton^ E. hieniale f. polystachyum Prayer, 

 E. hiemale f. ramigerum, A. Br., E. litorale arvensiforme A. A. Eaton, 

 E. variegatum Jesupi A. A. Eaton, Isoetes echinospora truncata A. A. Eaton, 

 /. melanopoda californica A. A. Eaton, /. paupercula (Eng.) A. A. Eaton, 

 Osmunda Claytonianae dubia Grant., Adiantum Capillus-Veneris f. elon- 

 gatum Lemmon. Asplenium anceps Solander, Athyrium cyclosorum Rupr., 

 A. cyclosorum f. Hillii Gilbert, A. cyclosorum strictum Gilbert, A. filix- 

 foemina elegans Gilbert, A. filix-foemina f. plano-rhoeticum Gilbert, 

 A. filix-foemina polyclados Moore, A. filix-foemina f. rectangulare Gilbert, 

 A. filix-foemina rubellum GWh^ri, A. filix-foemina stenodon Moore, Crypto- 

 gramme acrostichoides foveolata (Rupr.) Gilbert, Dicksonia pilosiuscula 

 cristata Davenport, Nephrodium Boottii f. multiflorum Gilbert, A^. spinu- 

 losum fructuosum Gilbert (Lastraea dilatata glandulosa Moore), Poly- 



Botan. Centralbl. Bd. LXXXIX. 1902. 4 



