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 margiuvS 
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. 7^. 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. 
