138 



ALEXANDER W, EVANS 



The underleaves are small and distant and show in general an 

 orbicular outline. They are deeply bifid with an obtuse to lunulate 

 sinus and erect or incurved lanceolate divisions, tipped with one or 

 two cells and usually four cells wide at the base. The lateral margins 

 are entire or vaguely and bluntly unidentate on the sides. The 

 underleaf just below a perichaetial bracteole is usually larger than the 

 others, with slightly broader divisions. 



Fig. 3. Lejeunea longifissa Steph. 

 A. Part of plant with two perianths and a male inflorescence, ventral view, 

 X 50. B. Part of a sterile stem, ventral view, X 50. C. Cells from middle of 

 lobe, X 300. D. Apex of lobule, X 225. E. Underleaf, X 225. F. Bracts and 

 bracteole, X 50. G-I. Bracts and bracteole from another involucre, torn apart, 

 X 50. The figures were all drawn from Mr. Rapp's specimens. No. 83. 



