188 Evans: Hepaticae from Florida 



sions offer the best differential characters, and these are supported 

 In fruiting specimens by the broader perianth with plane antical 

 surface and smooth keels. 



6, Lejeunea glaucescens Gottsche ; G. L. & N. Syn. Hep. 378. 



1845. 

 LcjeiLiiea {Eu-Lejenncd) glaucescens Steph. Hedwigia 29 : 85. 



1890. 



Breckeirs Hammock (£", G. Briiton J2). Widely distributed 

 in the American tropics. 



The leaves and underleaves of L. glaucescens are so much like 

 those o{ L. floridana that it would be difficult to distinguish the 

 species in sterile condition. Even the leaf-cells in the two species 

 are very similar, although the cell-walls in L. floridana are per- 

 haps a little more delicate. In both species, moreover, the inflor- 

 escence IS autoicous and the female flower is subtended by a single 

 innovation. In the involucre and perianth, however, the differen- 

 tial characters become apparent. In Z. glaucescens the bracts are 

 shorter than the leaves and the lobules are usually distinctly 

 pointed ; the bracteole is sharply bifid about one third with acute 

 or subacute divisions ; the perianth is five-keeled to below the 

 middle, and the keels, although minutely crenulate, do not project 

 upward as horns ; as the sporophyte matures the keels tend to 

 become obliterated. The male spikes of Z. glaucescens differ from 

 those o{ L. floridana in being shorter and broader. 



7. Cheilolejeunea decidua (Spruce). 



Lejeunea {Cheilo-Lejeuneci) decidua Spruce, Hep, Amaz. et And. 

 257. 1884. 



In hammocks near the homestead trail, between Camp Long- 

 view and Cutler {Small & Carter ijyo p. p., 1408). Breckell's 

 Hammock {Hozve 81). Everglades near Camp Longview {Small 

 & Wilson isso). Long Key, mainland {Small & Wilson iSS^)* 

 The original material of C. decidua was collected by Spruce in the 

 region of the Amazon, and so far the species has been reported 

 from no other localities. The Florida specimens are either sterile 

 or male, but they agree so perfectly with those distributed In the 

 Hepaticae Spruceanae that they can hardly represent any other 

 species. 



