1962| 



LEAF'S HEPATIOAE OF LATIN AM ERICA — PART I 



19 



7. Pmlerleaves and leaves of similar size and form. 



8. Margins of the leaves and under leaves entire or with only an occa- 

 sional small tooth at the base. 

 It. Plants light to dark green, with or without only a little brown 

 pigmentation. 



10. Segments of the leaves and underleaves uniseriate. Telaranea. 

 10. Segments of the leaves and interleaves triangular. Lembidium. 

 !». Plants pigmented with brown, usually strongly so. 

 10. Segments triangular from a 2-10-celled base. 



11. Leaves and underleaves without teeth near the base, or rarely 



with a short tooth ; the segments entire. Micrisophi/lla. 

 11. Leaves and underleaves with a conspicuous long tooth sug- 

 gesting a small segment, on one or both sides at the base; 

 the segments usually with a single tooth or a pair of opposite 

 spines, teeth, or short cilia in the lower part. Temnoma. 

 10. Segments uniseriate, occasionally from a 2- or 3-celled base. 

 11. Leaves and underleaves divided to the middle, the cuticle very 

 coarsely striate; segments of the female bracts with several 

 pairs of opposite cilia. Temnoma. 

 11. Leaves and underleaves divided to the middle or below, the 

 cuticle verruculose to striolate; segments of the female bracts 

 laeiniate or ciliate but not with opposite pairs of cilia or 

 teeth. Mierolepidozia. 

 6. Line of leaf insertion oblique. 



7. Leaves succubous, the segments divergent. 



8. Leaf segments lanceolate from a 1-3-celled base, the tip long, accu- 

 mulate, 4-6-celled; underleaves small, the segments similar. Chaetocolea. 

 8. Leaf segments shorter, from a mostly 4-celled base, the tip only 1- or 



2-celled ; underleaf segments unequal, variable. Mierolepidozia. 

 7. Leaves incubous, flagelliform branches frequent. 

 8. Leaves long-decurrent. 



9. Leaf-cells tending to be in longitudinal rows; segments (teeth) 

 two to four cells long; stems with 12 longitudinal rows of 

 cortical cells. Neolepidozia. 

 9. Leaf -cells not necessarily in rows; segments longer, straight to 

 curved; stems with more than 12 longitudinal cortical rows of 

 cortical cells. Lepidozia. 

 8. Leaves scarcely decurrent; plants large to small, irregularly branched, 

 or pinnate to tripinnate; lamina with or without marginal teeth. 



Lepidozia. 



4. Leaves 5-, 6-, to many-parted. 



5. Line of leaf insertion transverse or nearly so; margins of the leaves and 



underleaves entire. Telaranea. 

 5. Line of leaf insertion oblique, the leaves incubous; margins of the leaves 



variously incised, toothed, ciliate, etc. Lepidozia. 



