1968] 



LEAFY HEPATICAE OF LATIN AMERICA PART III 



343 



margin often slightly up-curved; cells of the border large, with very thick walls, 

 those of the upper part of the leaf 26 X 26 fi, with thin walls often as narrow pits 

 between the large, rounded trigones, the cell lumina angular to stellate, the cuticle 

 verruculose. Underleaves very small, scale-like, obscure. Plants dioicous. Female 

 inflorescence on a short ventral branch, the bracts and bracteoles in 3 series, the 

 innermost series largest, the bracts divergent above, ovate, bifid to one-third, the 

 segments triangular, the margins irregular. Perianth long, cylindrical below, 3-keeled 

 above, the mouth contracted, crenulate and with a few short cilia. Gemmae two- 

 celled. Male inflorescence not seen. 



PI. 89. Fig. 8, a-f. 



Habitat: In forests, in mats on logs, tree bark, more rarely on rocks and 

 stream banks. 



TRINIDAD: si., Fend'er (BM, NY). 



VENEZUELA: Bolivar: Auyan-tepui, "Drizzly Camp," 1760 m, Steyermark 93344, 93349 

 (VEN) ; s.l., Fendler (BM). 



SURINAM: s.l., Wullschlagel (BM). 



BRAZIL: near Rio de Janeiro, Glaziou 11760, type of O. sphagni var. (G-13228), isotypes 

 as Sphagnoecetis prostrata (C, G-13247, NY), isotype as Pleuroschisma sphagni (NY); Rio de 

 Janeiro, Glaziou 7227, type of O. splendens (type G-13253), isotype as 5. prostrata, (C), isotype 

 as 0. denudata (S-PA) ; Merida, Goebel (BM); s.l., Sellow (BM) ; s.l., Ule (BM) ; Minas Gerais, 

 Wainio (BM). 



9. Odontoschisma falcifolium Stephani, Spec. Hep. 3: 369. 1908. [Ule no. 573.] 



Jungermannia pros'.rata p brasiliensis Nees in G. L. & N. Syn. Hep. 149. 1845. 

 Odontoschisma sphagni var. amazonica Spruce, Jour. Bot. London 14: 166. 1879. 

 Cephalozia subg. Odontoschisma, sphagni var. amazonica Spruce, Trans. Proc. Bot. Soc. Edinb. 

 15: 401. 1885. 



Odontoschisma sphagni Stephani, Hedwigia 44: 225. 1905. Non Dumortier. [Ule no. S73.] 

 Odontoschisma caracanum Stephani, Spec. Hep. 3: 374. 1908. 



Odontoschisma obcordatum var. falcifolium (Stephani) Herzog, Hedwigia 71: 335. 1931. 

 Odontoschisma cubana var. minor Stephani, in Hb. 



Plants of medium size, green or tinged with brown, occasionally becoming reddish, 

 in mats or among other bryophytes; stems to 3 cm long, with leaves 1.5-2 mm wide, 

 occasionally becoming flagelliform at the tips; branches ventral-intercalary, leafy or 

 more commonly long-flagelliform stolon-like or very short, sexual, occasionally 

 gemmiparous. Rhizoids abundant, long, from the underside of the stem. Line of 

 leaf insertion oblique. Leaves spreading or the 2 rows folded together, often 

 slightly ascendant, ovate-truncate, to 0.9 mm long, to 0.8 mm broad at the base, 

 narrowed to the broad-rounded apex, the margin straight, usually plane; cells of 

 the apical margin 20-22 the outer wall very thick, cells of the upper part of 

 the leaf mostly 26 X 26 the walls with thin pits and large, knot-like trigones, 

 the cell lumina stellate, the cuticle rough. Underleaves very small, scale-like. Plants 

 dioicous. Female inflorescence on a very short ventral branch, the bracts and bracte- 

 oles widely spreading to falcate, in 3 series, the innermost series the largest, bifid 

 to one-half or less, the segments triangular, the margins irregular. Perianth long, 

 3-keeled from a cylindrical base, the mouth contracted, fringed with cilia and long 

 slender filaments. Gemmae whitish green, 2-celled. Male inflorescence not seen. 



PI. 89. Fig. 9, a-i. 



Habitat: Over logs, tree trunks, rocks and soil in forests and savannas. 



COLOMBIA: Amazonas-Vaupes: Rio Apaporis, Cachivera Jiryirimo, 250 m, Schidtes & 

 Cabrera 11987, 11996, 12394, 12403 (FH) ; Rio Kuduyari, Yapaboda, Schidtes & Cabrera 14268, 

 14302 p.p. (FH); Rio Papure, Teresita, Schidtes & Cabrera 19457 p.p. (FH). 



