Evans: Hepaticae from Florida 185 



ing, more widely spreading after fertilization, complicate, the lobe 

 narrowly oblong to lanceolate, 0.28 mm. long, 0.08 mm. wide, 

 rounded to acute at the apex, margin as in the leaves, lobule ob- 

 long to cuneate, 0.12 mm. long, 0.035 "^^^- ^vide, apex mostly 

 broad and obtuse, margin entire, or irregularly denticulate In apical 

 region ; perianth (immature) broadly obovate, 0.18 mm. long, 0.16 

 mm. wide, somewhat flattened, antical face plane, postical face with 

 a broad and rounded keel, apex broad and truncate with a short 

 beak, lateral keels sharp, denticulate from projecting cells, surface 

 of perianth otherwise smooth or indistinctly roughened along the 

 postical keel : (^ inflorescence occupying a short branch or terminal 

 on a longer branch ; bracts distant to subimbncated, in one to six 

 pairs, the lobe suberect, lanceolate, acute^ 0.13 mm. long, 0.06 mm. 

 wide, margin as in the leaves, lobule slightly concave, obovate, 

 bluntly pointed, 0.08 mm. long, 0.05 mm. wide, entire or indis- 

 tinctly denticulate ; antheridia solitary : mature sporophyte not 



seen. (Plate 5, figures 9-14-) 



In hammocks near the homestead trail, between Cutler and 

 Camp Longview (^S}nall & Carter ^J^j p. p., ij'/o p. p.). No. 

 ij6^ may be designated the type. 



C. diapJiana is smaller and much more delicate than any of 

 the other species of Cololejemiea known from the United States. 

 The only one which it at all resembles is C. Biddlecoiniae (Aust.) 

 Evans, * in which also the leaves are more or less narrowed 



+ 



toward the apex and often acute. But in C, Biddlecoiniae the 

 whole outer surface of the lobe is roughened from projecting cells, 

 there is a long stylus at the base of the lobule, and the rough- 

 ened perianth is sharply five-keeled. 



Among the tropical species, Lejeitnea [ColO'Lejeiaied) ensifolia 

 Spruce, I an epiphyllous plant found in the Amazon region, is 

 closely related to C, diaphaiia, but differs in its longer and more 

 sharply pointed leaves, which are furthermore falcate and hamate. 

 The YdiYi^iy pigmaea of this species, which, as Spruce implies, may 

 be worthy of specific rank, has broader leaves than the type but 

 is distinguished from C. diaphana by its five-keeled perianth, the 

 keels projecting upward as short and rounded horns. 



5. Lejeunea floridana sp. nov. 



Bright- or pale-green, growing in depressed tufts, often mixed 

 with other hepatics : stems prostrate, 0.14 mm. in diameter, 



* *Mem. Torrey Club 7 : 168. X902. 

 f Hep. Amaz. et And. 297, 1884. 



