30 A. W. Evans — North American Species of Frullania. 



mouth : 5 spike globose, occupying the extremity of a short lateral 

 branch near the perianth, bracts in about two pairs. 



Stems 0-13""" in diameter ; lobes of leaves O-oO"^''^ long, 0-45'^'^ 

 wide, lobules 0-23™'" long, 0-14'"'" wide ; underleaves 0'25°"" long and 

 wide; lobes of branch-leaves 0-35™™ long, 0-30™'" wide; branch- 

 underleaves O'lS™'" long, 0*14'""° wide ; leaf-cells at edge of lobe 

 0-016'^'^ in the middle 0-018""" in diameter, at the base 0-030""" long 

 Q.Q>23inm ^\^Q . iji-act I, lobe 1.10'"'" long, 0-50'^"^ wide, lobule O-GS"^-" 

 long, 0-40""" wide; bracteole I, 0-85""" long, O-YO"™ wide; bract II, 

 lobe 0-90'""' long, 0-85"^'^ wide, lobule O^VS""^^ long, 0-25'""' wide ; 

 bracteole II, 0-VO"^"' long, 0-40'""^ wide; perianth 1-25'"°^ long, 0*90""" 

 wide. 



On bark of trees (mostly the white cedar) ; near Urbana, Ohio 

 (Sullivant, Miss Biddlecome) : Campaign County, Ohio (Werner) : 

 Ste. Anne's River, Gaspe, Canada (Macoun), Distributed in Hep. 

 Amer. n. 176. 



Austin was apparently familiar with the characters of this distinct 

 little species, for he has described them clearly and fully under his 

 I. SullivanticB ; but, strangely enough, he afterwards considered 

 them too unimportant to separate our plant from the European l". 

 fragilifolia. In a sterile condition, the two species certainly resem- 

 ble each other closely ; both are reddish in color and branch in about 

 the same way and both show discolored cells in their leaves. In F. 

 fragilifolia, however, the stems are a little more slender than in jP. 

 Selioyniana, the underleaves are narrower, and the discolored cells 

 are usually irregularly scattered instead of being arranged in a more 

 or less distinct line or group in the middle of the lobe. When inflo- 

 rescence or perianths are present, I<. Selioyniana can be at once dis- 

 tinguished from the European plant by its antheridial spikes borne 

 close to the involucre ; its perianth, too, is less exserted, its inner- 

 most bracts are acute, and its bracteoles are free. I*. Selwyniana is 

 our only autoicous species with discolored cells in its leaves. I have 

 retained for this species the name recently given to it by Mr. Pear- 

 son, Austin's older name being too like i'. Sullivantii. 



18. Frullania Kunzei Lehm. et Lindenb. in G. L. et N. Syn. Hep., 449. 1845. 



Jungermannia Kunzei Lehm. et Lindenb. in Lehmann, Pugillus vi : 50. 1834. 



IruUania Drummondii Tayl., Lond. Jour. Bot., v : 401. 1846. 

 Plate XIV. figs. 1-16. 



Autoicous : plants closely appressed to matrix, reddish-brown, 

 varying to deep blackish-purple in more exposed situations : sterile 



