1904] Evans, — Notes on New England Hepaticae, — II 171 



of the Farmington River, and the majority of them were partially 

 covered with sand. It is probably on this account that they are 

 less robust than is usual in the species and that their leaves are less 

 concave and more frequently spreading. In these respects the 

 specimens resemble large forms of J. riparia Tayl. (particularly the 

 VA.T. pofamophila Bernet i) a species known in America from British 

 Columbia only. In J. cordifoUa, however, the walls of the leaf-cells 

 although thin are firm and usually more or less pigmented with pur- 

 plish red, while in /. riparia the cell-structure is more delicate and 

 the walls are colorless. The cells of /. cordifolia^ moreover, are 

 wholly destitute of trigones, while in /. r;^(^?r/i7 minute but distinct 

 trigones may almost always be demonstrated. The cuticle of /. 

 cordi/olia, finally, is distinctly striate-verruculose, especially toward 

 the bases of the leaves, while in the other species it is perfectly 

 smooth. According to Pearson'-^ the absence of rootlets and of 

 flagella is a constant peculiarity of /. cordifo/ia, both being abun- 

 dantly produced by J. riparia. This difference cannot be relied 

 upon; the fertile specimens of y. (^fr/y^/c;//^ distributed by Schiffner 

 in his Hep. Europ. Exsic. y8, show both rootlets and flagella, and 

 the same is true of the Rainbow specimens. 



5. Sphenolohus exsectaeformis (Breidl.) Steph. Bull, de 

 I'Herb. Boissier, II. 2 : 178. 1902. Jungermannia exsectaeformis 

 Breidl. Mitth. d. Naturw. Ver. f. Steiermark, 30: 321. 1894. Diplo- 

 phyllum exsecii/ortne Warnst. Kryptogamenfl. der Mark Branden- 

 burg, I : 161. 1902. Mt. Desert, Maine {W. G. Farlow)\ Ran- 

 dolph, New Hampshire ( W. G. Farlow) ; Laconia, New Hampshire 

 {Mrs. Carter) ; Jericho, Vermont {A. W. E.) . 



6. Sphenolobus exsectus (Schmid.) Steph. Bull, de I'Herb. 

 Boissier, II. 2 : 178. 1902. /ungerniannia exseda Schmid. Ic. 

 Plant. Ed. II. 241. //. 62^/. 2, p. p. 1797. Lophozia exsecta 

 Dumort. Recueil d'Obs. sur les Jung. 17. 1835. Scapania exsecta 

 Aust. Hep. Bor.-Amer. 21. 1873. Diplophylliim exsectum Warnst. 

 Kryptogamenfl. der Mark Brandenburg, i: 160. 1902. Shelburne 

 and Glen Ellis, New Hampshire {W. G. Farlow) \ Willoughby, 

 Vermont {Miss Lorcnz) ; Branford, Connecticut {A. W. E.). 



The two species just noted are very closely allied, and it is only 



1 Cat. des Hep. du Sud-Ouest de la Suisse, etc. 58. //. /,/ /. 1888. 

 ^ Hep. Brit. Isles, 291. 1901. 



