1966] 



LEAFY HEPATICAE OF LATIN AMERICA — PART II 



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7. Segments of the leaves and underleaves if ciliate, with the cilia fewer 

 and irregularly arranged along the margins. 

 8. Stem leaves concave, the dorsal base auriculate. 

 9. Cells of the segment-tips 36 n or more long. 23. L. andicola. 



9. Cells of the segment-tips 18 m long. 22. L. auriculata. 



8. Stem leaves concave, the dorsal base cordate, often with an appendage 

 or teeth. 



9. Segments of the leaf and underleaf with frequent marginal teeth 



and cilia; underleaves variously incised. 19. L. armata. 



9. Segments of the leaf and underleaf essentially without teeth; 

 ventral margin of the leaves convex and with one to several teeth. 



18. L. macrocolea. 



6. Leaves and underleaves with four segments, teeth and cilia only on the 

 margins of the lamina. 

 7. Margins of the segments conspicuously uneven, undulate. 30. L. alstoni. 

 7. Margins of the segments straight, never undulate. 

 8. Margins of the leaf lamina with or without a tooth; underleaves with 

 a tooth; underleaves with a conspicuous tooth on either side of the 

 lamina near the base; the segments long-tapering from a 6-8-celled 

 base, the uniseriate tip two or three cells long. 15. L. miinchiana. 



8. Margins of the leaf lamina (more often of the branch leaves), 

 with one to several teeth ; underleaf segments mostly from a 4-celled 

 base, tapering to a uniseriate tip seven to ten cells long. 16. L. wallisiana. 

 5. Stem leaves concave-cucullate to saccate, the dorsal margin long, strongly 

 arched across the stem, the ventral margin short, only to one-fourth as long 

 or less. 



6. Ventral margins of the leaves and the margins of the underleaves of 

 the stems and branches with one to three short obscure teeth; dorsal 

 leaf base straight or slightly rounded. 21. L. dendritica. 



6. Margins of the stem leaves and underleaves with several teeth; margins 

 of the branch leaves and underleaves with many teeth and cilia. Dorsal 

 leaf base usually auriculate or appendiculate. 

 7. Cells of the segment-tips 18 /u long. 22. L. auriculata. 



7. Cells of the segment-tips to 36 /t long. 23. L. andicola. 



1. Plants of southern South America, i.e., Patagonia and Tierra del Fuego. 

 2. Plants large; stems with leaves to 2 mm or more broad; leaves to 1.85 mm broad 

 at the base, the segments to 20 cells at the base; lamina of the leaves and 

 underleaves with large teeth or spines near the base. 25. L. chiloensis. 



2. Plants smaller ; stems with leaves only 1 mm or less broad. 

 3. Margins of the leaves and underleaves without teeth. 

 4. Leaf segments in conspicuous pairs, incurved, leaf-cells large, usually 



18-27 X 18-22 /it at the base of a segment; plants often brown. 28. L. fuegiensis. 

 4. Leaf segments not conspicuously in pairs, four to six cells broad at the base; 

 leaf-cells at the base of the segment 16-18 X 18 n; cuticle coarsely papillose. 



29. L. laevifolia. 



3. Margins of the lamina of the leaves and/or underleaves with one to several 

 teeth or cilia. 



4. Plants brownish; leaves and underleaves broader than long, the lamina of the 

 leaves with one or more teeth, the lamina of the underleaves with bulging 

 sides bearing several teeth; leaf cells 18-24 X 24 /u. 27. L. cuspidata. 



4. Plants green to light brown; leaves and underleaves longer than broad; 

 leaf-cells 10-18 X 18 m- 

 5. Dorsal margin of the leaf with one sharp tooth; underleaf lamina with at 



least one large tooth at either base. 26. L. chordulijcra. 



5. Dorsal margin of the leaf denticulate, and short-ciliate, or with one-several 

 teeth near the base ; underleaf lamina usually with a lateral tooth on either 

 side. 25. L. chiloensis. 



1. Lepidozia patens Lindenberg in G. L. & N. Syn. Hep. 202. 1845. 



Lcpidozia microphylla var. /3 Lindenberg in G. L. & N. Syn. Hep. 202. 1845. 

 Mastigophora patens Trevisan, Mem. 1st. Lomb. III. 4: 416. 1877. 



