1968] 



LEAFY HEPATICAE OF LATIN AMERICA PART III 



349 



Plants small, delicate, prostrate to ascending, light green, in tufts or among other 

 bryophytes; stems to 1 cm or more long, with leaves mostly 0.5-0.8 mm wide, irregu- 

 larly branched, the branches lateral, leafy, of the Frullania type or ventral-inter- 

 calary, axillary and leafy or often flagelliform; stem in transverse section 5-8 cells 

 across, the cells rather large. Rhizoids from cells of the ventral side of the stem. 

 Line of leaf insertion oblique. Leaves distant to approximate, bilobed, cuneate, to 

 0.65 mm long, to 0.45 mm wide at the middle, divided to one-half their length, the 

 two segments oblong, spreading, rounded at the apex, the margins more or less 

 crenulate; cells of the leaf segment subquadrate to rectangular in outline, 26-30 X 

 20 fi, the walls thin, without trigones, the cuticle smooth. Underleaves small, linear 

 to ovate. Plant dioicous. Female inflorescence terminal on the stem or branch, the 

 bracts and bracteoles in 2 or 3 series, similar to the leaves, slightly larger. Perianth 

 cylindrical below, 3-keeled above, the mouth slightly contracted, crenulate. Male 

 inflorescence and sporophyte not seen. 



PI. 90. Fig. 2, a-f. 

 Habitat: On moist soil banks, wet rocks or rarely on trees in forests. 



ST. KITTS: Mt. Misery, Breutel (type G-13206). 

 GUADELOUPE: s.l., Duss 1000 (G-13207). 



DOMINICA: s.l., Elliott 1236 (9) (G-13210) ; the same, as C. obtusata Steph. = Cephalozi- 

 opsis schistochila var. Schust. (BM). 



MARTINIQUE: s.l., Duss 1173 (G-13209). 



ST. LUCIA: Castries, 300 ft, Simmonds 202 (MICH). 



TRINIDAD: Blue Basin, 250 ft, Simmonds 312 (MICH). 



GUATEMALA: Quezaltenango: Fuentes Georgianas, slopes of Volcan de Zunil, 2300-2500 m, 

 Standley 86027, 86052 (F). 



BRAZIL: Serra das Orgaos, Liitzelburg 7312 (S-PA). 



Alobiellopsis Schuster, Nova Hedwigia 10: 25. 1965. 



Cephalozia subg. IV Alobiella Spruce p.p. 

 Alobiella (Spruce) auct. p.p. 



Plants small, flaccid, whitish or becoming tinged with red; stems irregularly 

 branched, the branches ventral-intercalary, leafy or stolon-like flagelliform, becom- 

 ing leafy in the outer part; in transverse section five or six cells across, the cortical 

 layer of 8-12 rows, the cells of the medulla similar but with thin walls and small 

 trigones. Rhizoids abundant, long, from the ventral side of the stem, colorless or 

 tinged with brown. Leaf insertion oblique, the leaves succubous. Leaves orbicular 

 to ovate with a broad rounded apex or rarely retuse, or truncate or blunt-pointed. 

 Underleaves of 1 or 2 cells, becoming larger just below the female inflorescence. Male 

 inflorescence terminal becoming intercalary on the leafy axis, the bracts more or less 

 leaf-like with the dorsal side folded forming a pouch, monandrous, the bracteoles 

 of only a few cells; antheridia large. Female inflorescence terminal on the stem or 

 a short branch, the bracts and bracteoles in several series, the outer series like the 

 leaves, the inner series larger, bifid. Perianth short, cylindrical below, with 3 broad 

 keels above, lobed and crenulate to spinose. Gemmae at the tips of stems. 



Type species: Cephalozia acroscypha Spruce, 1885. 



the apical portion of a leaf, X 275. Fig. 1 a-k, from an isotype (NY) ; 1 m, from the type of 

 O. cubanum. 



Fig. 2. Cladopodiella intertexta. 2 a. Stem, dorsal view, X 40. 2 b. Leaf and underleaf on 

 a tiny stem, X 50. 2 c. Segment of a leaf, X 200. 2 d. Underleaf, X 50. 2 e. Transverse section 

 of a stem, X 200. 2 f. Portion of a perianth mouth, X 200. Fig. 2 a-e, from Guadeloupe, Duss 

 1000; 2 f, from Dominica, Elliott 1236. 



