528 Evans: A new Lejeunea 



tropical and subtropical America. Both species are somewhat 

 larger than L. minutifolia, the leaves being often 0.7 mm. in length, 

 but they agree with it in inflorescence and in having small or- 

 bicular underleaves. In both species, however, the lobules are 

 frequently inflated and conform closely to the usual Lejeunea type. 

 L. floridana is further distinguished by its much larger perichaetial 

 bracts (often 0.8 mm. in length), by its more shortly bifid under- 

 leaves and bracteole, and by the crenulate keels of its perianth, 

 projecting upward as horns. In L. glaucescens, the bracts approxi- 

 mate those of L. minutifolia in size but the lobules are usually 

 distinctly pointed. 



Sheffield Scientific School, 

 Yale University 



Explanation of plate 24-- 



Lejeunea minutiloba Evans 



The figures were drawn by the writer from the type specimen and prepared for 

 pubhcation by Mr. H. D. Rhynedance. 



Fig. I. Part of plant with two perianths, ventral view (male inflorescence not 

 shown), X 45. 



Fig. 2. Lobule of a stem leaf, X 250. 



Fig. 3. Cells from the apex of a lobe, X 335. 



Fig. 4. Cells from the middle of a lobe, X 335. 



Fig. 5. Underleaf, X no. 



Figs. 6-8. Bracts and bracteole from a single involucre, X 55. 



Figs. 9-11. Bracts and bracteole from a second involucre, X 55. 



Figs. 12-14. Bracts and bracteole from a third involucre, X 55. 



Fig. 15. Bracteole from a fourth involucre, X 55. 



Fig. 16. Lobule of a perichaetial bract, X 250. 



Figs. 17-20. Apices of various bracteole-divisions, X no. 



Fig. 21. Transverse section of a perianth in upper fourth, X 55. 



