1968] 



LEAFY HEPATICAE OF LATIN AMERICA — PART III 



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8. Cells of the underleaf segments essentially similar to those of 

 the upper part of the leaf; underleaf deep-set on the stem. 

 9. Underleaves 3 or 4 times as broad as the stem. 



IS. C. grandistipula. 



9. Underleaves scarcely broader than the stem. 16. C. subintegra. 



3. Underleaves bifid and with one or more large projections on the margins, or with 

 teeth or spines near the apex. 



4. Underleaves with a large projection or tooth (rarely several) on the lateral 

 margins, deep-set (decurrent) on the stem. 



5. Underleaves very large, imbricate, 3 or 4 times as wide as the stem. 



15. C. grandistipula. 

 5. Underleaves smaller, rarely more than twice as wide as the stem; cells of 

 the upper part of the leaf hexagonal, thin-walled, without trigones; stem 

 tips often becoming erect, gemmiparous. 13. C. peruviana. 



4. Underleaves with at least a few teeth and spines along the upper part, trans- 

 versely inserted on the stem ; leaves long-rectangular, undivided. 

 S. Segments ending in a long, triangular spinose tooth; leaf cells thin-walled. 



8. C. parallelo gramma. 

 5. Segments broad, rounded with a few short spines along the top; leaf cells 



with conspicuous trigones. 12. C. fissistipula. 



2. Underleaves bisbifid (4-divided with the middle sinus deepest) ; leaves bordered, at 

 least in the lower half (sometimes weakly so). 



3. Leaves of well developed stems symmetric or nearly so, typically long, orbicular 

 to oblong-ovate; (leaves of one side of the stem often smaller and deformed for 

 a distance.) 



4. Leaf apex broad, shortly bifid, the teeth mucronate, 1 or 2 cells long. 



26. C. amazonica. 



4. Leaf apex bifid, the teeth triangular, several cells wide at the base, the sinus 



V- or U-shaped. 27. C. miquelii. 



3. Leaves asymmetric. 



4. Leaves bordered below by a row of long, narrow cells with oblique, over- 

 lapping ends. 



5. Border cells 130-230 /i long, with very long overlapping end walls. 



24. C. steyermarkii. 



5. Border cells 78-104 /* long, with short, overlapping ends. 23. C. lechleri. 



4. Leaves bordered by quadrate or rectangular cells with truncate ends. 



S. Leaves conspicuously falcate, the segments pointing downward. 28. C. falcata. 

 5. Leaves spreading or ascendant. 



6. Underleaves small, not wider than the stem; teeth of leaves 1 or 2 cells 



long, separated by a narrow, lunulate sinus. 25. C. laxa. 



6. Underleaves conspicuous, wider than the stem. 



7. Underleaves truncate-ovate with convex sides; teeth of the leaves 



ascendant. 22. C. densifolia. 



7. Underleaves cuneate; teeth of the leaves straight, often triangular 



from a broad base. 29. C. lophocoleoides. 



1. Calypogeia rhynchophylla (Herzog) Bischler, Candollea 18: 26. /. 6. 1962. 

 Mnioloma rhynchophylla Herzog, Ann. Bryol. 3: 115. /. 1-4. 1930. 



Plants large, yellow-green to olive-green, prostrate, caespitose; stems large, 3-5 

 cm long, with leaves, 2-3.8 mm wide, sparingly irregularly branched; branches 

 ventral, axillary-intercalary, leafy or rarely flagelliform or sexual. Rhizoids few, 

 long hyaline, from small basal cells of the underleaves. Line of leaf insertion oblique, 

 nearly longitudinal. Leaves widely spreading, bordered, subimbricate, asymmetric, 

 long ovate, the dorsal margin often straight from a curved base, the ventral margin 

 strongly arched above from a slightly decurrent base, the apical end broad, often 

 truncate, mucronate; leaf border conspicuous, of 2-4 obliquely overlapping thick- 

 walled cells 100-150 X 10-13 /a, with tapering ends, extending from the base and 

 forming the mucronate tip; cells of the upper part of the lamina 20-40 X 13-26 /x, 



