1968] 



LEAFY HEPATICAE OF LATIN AMERICA PART III 



321 



2 rows more or less appressed, broadly ovate-truncate, to 0.52 mm broad, to 0.48 

 mm high, bifid to one-third the length, the lateral margins convex, not decurrent; 

 segments broadly triangular from a base 6-10 cells wide, ending in a tip 1 or 2 

 cells long, the sinus broad V- or U-shaped; cells of the base of the segment mostly 

 33-42 X 33-39 with thin walls, scarcely evident trigones and smooth cuticle. 

 Underleaves absent. Plants dioicous. Male inflorescence terminal or becoming inter- 

 calary on a stem, the bracts in 3-6 or more pairs, similar to the leaves but smaller, 

 monandrous. Female inflorescence terminal on a short leafy branch, the bracts and 

 bracteoles in 3 or 4 series, larger than the leaves, the outer series bifid, the large 

 innermost bracts bifid and with 1-2 large blunt marginal outgrowths below the 

 middle. Perianth cylindrical below, more or less three-keeled above, the mouth 

 crenulate and with a few longer setae. Sporophyte not seen. 



PI. 79. Fig. 7, a-g. 



Habitat: Over mosses and Sphagnum, particularly in bogs. 



CHILE: 198 k n of Punta Arenas, Sphagnum Bog, Fulford & Hatcher 210 p.p., 225 p.p. 

 (Hb Fulford). 190 k n of Punta Arenas, Sphagnum Bog, Fulford & Hatcher 244, 245, 248a p.p., 

 256 p.p., 259, 262, 266 ( 9 ), 274, 276, 277 p.p., 279, 282, 283 (type), 285, 286 p.p., 288 p.p. (Hb 

 Fulford); same locality, G. Hassel de Menendez 11177 p.p. (BA). 



8. Cephalozia dussii Fulford, sp. nov. 



Plantae parvae, subvirides; folia subtransverse inserta, bifida, segmentis triangu- 

 laribus. Amphigastria obsoleta. Inflorescentia masculina intercalaris in caule, 

 bracteis foliiformibus, parvioribus. Bracteae feminae bracteolaeque in 3 seriebus, 

 similibus foliis, maiores. Perianthii os crenulatum et breviciliatum. 



Plants small, greenish-white, in mats and among other bryophytes; stems slender, 

 1-2.5 cm long, with leaves 0.5-0.8 mm wide, irregularly branched, the branches 

 lateral, leafy, of the Frullania type or ventral-intercalary, long leafy or long, often 

 branched, flagelliform, or short and bearing a female inflorescence; stem in trans- 

 verse section with the dorsal rows of the cortical layer of large cells and the ventral 

 rows of small cells. Rhizoids from the ventral side of the stem. Line of leaf insertion 

 oblique, subtransverse. Leaves 0.4-0.6 mm long, erect-spreading, bifid to one-half, 

 the segments narrowly triangular from a 3- or 4- celled base, ending in a tip of 2 

 or 3 cells; cells of the base of the segment 39-50 X 20-26 /x, the walls uniformly 

 thickened, the cuticle essentially smooth. Underleaves absent. Plants dioicous. Male 

 inflorescence terminal becoming intercalary on the stem or branch, the bracts in 

 6-12 pairs, imbricate, similar to the leaves. Female inflorescence on a short ventral 

 branch, the bracts and bracteoles in 3 or 4 series, deeply bifid, the segments like 

 the leaf segments. Perianth long exserted, cylindrical below, 3-keeled above, the 

 mouth irregularly crenulate and setulose. 



PI. 80. Fig. 8, a-g. 



Habitat: On decayed logs in shaded areas. 



GUADELOUPE: Bois de Sofaga, 460 m, Duss 49 (type G-618, NY). 



MARTINIQUE: Morne de la Calebasse, 690 m, Duss 215 p.p. (NY); Morne Molelyane, 

 830 m, Duss 256 (NY). 



MEXICO: Puebla: w of Huauchinango, Sharp 986 (TENN). 

 BOLIVIA: Gran Poder, W. Brooke 6295B p.p. (BM). 



Fig. 9. C. bischlerae. 9 a. Stem, dorsal view, X 35 ; F, half-leaf with the Frullania type 

 branch. 9 b. Stem, ventral view, X 50. 9 c. Segment of a leaf, X 200. 9 d. Transverse section 

 of a stem, X 200. 9 e. Female inflorescence and perianth, X 35. 9 f-g. Tip of a female bract, 

 innermost series, X 200. 9 h. Portion of a perianth mouth, X 200. Drawn from the type. 



