1968] 



LEAFY HEPATICAE OF LATIN AMERICA PART III 



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from the bases of the underleaves. Line of leaf insertion oblique, nearly longi- 

 tudinal. Leaves subquadrate, retuse, bordered, plane, 0.8 mm long, 0.9 mm wide, 

 the dorsal base curved, the ventral base strongly decurrent, the apex broad, the 

 margin strongly crenulate, of a row of elongate cells; cells of the upper part of 

 the leaf 34 X 25 /x, the walls thin, the trigones small, the cuticle papillose. Under- 

 leaves broadly ovate to orbicular, wider than the stem, the cells thin-walled, without 

 trigones, the margin crenulate, the apex often retuse or shortly bidentate. Inflores- 

 cences, perigynium and sporophyte not seen. 



PI. 66. Fig. 3, a, b. 



Habitat: In mats on bark. 



PERU: S. Gavan, Lechler (type G-1851). 



4. Calypogeia elliottii Stephani, Spec. Hep. 3: 395. 1908. 



Plants of medium to large size, deeply pigmented, yellow-brown to dark brown, 

 in depressed mats or among other bryophytes; stems coarse, to 5 cm long, with 

 leaves, 1.5-2 mm wide, rarely branched; branches leafy, ventral, axillary-intercalary; 

 stem in transverse section with a brown unistratose cortical layer of thick-walled 

 cells surrounding the medulla of cells with thinner walls. Rhizoids scarce, long, 

 brownish, in tufts from small cells of the bases of underleaves. Line of leaf insertion 

 oblique, nearly longitudinal. Leaves oblong, subimbricate, bordered, widely spread- 

 ing, plane or decurved in the outer part, 0.9-1.0 X 0.8-0.85 mm, the apex broad- 

 rounded, the dorsal base slightly curved, the ventral base shortly decurrent, the 

 margin more or less weakly crenulate; leaf border of 1 or 2 rows of long-rectangular 

 cells elongate at a right angle to the leaf margin, 33-45 X 15-25 fi, the walls uni- 

 formly thickened; cells of the upper part of the leaf 33-50 X 30-40 /x, the walls 

 thin with conspicuous elongate trigones and occasional intermediate thickenings, the 

 cuticle punctate, becoming striolate in the basal cells. Underleaves large, long-ovate, 

 the base twice as wide as the stem, the apex often tapering, very shortly cleft, the 

 cells long, thin-walled, the margin entire to crenulate. Male and female inflores- 

 cences, perigynium and sporophyte not seen. 



PI. 67. Fig. 4, a-d. 



Habitat: In brown mats on trees. 



PUERTO RICO: Pico del Oeste, 1020 m, Wood (Hb Fulford). 



DOMINICA: without locality, Elliott 1139 (lectotype G) ; Morne Micotrin, 3800 ft, Elliott 

 1117, 1143, 1147C p.p. (BM); Morne Trois Pitons, Elliott 2236 p.p., 2288C (BM). 



5. Calypogeia caespitosa (Spruce) Stephani, Spec. Hep. 3: 397. 1908. 

 Kantia caespitosa Spruce, Trans. Proc. Bot. Soc. Edinb. 15: 412. 1885. 



Plants of medium to large size, olive-green tinged with brown, in tufts or 

 depressed mats; stems to 5 cm long, with leaves, to 3 mm wide, irregularly distantly 

 pinnate; branches leafy, frequent, ventral-intercalary, usually solitary from the axil 

 of an underleaf; stem in transverse section with a unistratose cortical layer of 

 brownish thick-walled cells surrounding the medulla of thin-walled cells. Rhizoids 

 infrequent, long brownish with branched tips, in tufts from small cells of the bases 



of a leaf, X 200. 5 c. Cell from the upper part of a leaf, X 500. 5 d. Portion of an underleaf, 

 X 200. Drawn from the type. 



Fig. 6. C. crenulata. 6 a. Stem, ventral view, X 37. 6 b. Upper portion of a leaf, X 200. 

 6 c. Cell from the upper part of a leaf, X 500. 6 d. Underleaf, X 120. Drawn from the type. 



