1962] 



LEAFY HEPAT1CAE OP LATIN AMERICA — PART 1 



121 



leaf-cells with uniformly thickened walls, the trigones tiny or absent, the lumina 

 rounded, the cuticle verruculose; cells of the apical portion 18 X18/*, those of 

 the median portion larger. Underleaves distant to imbricate, quadrate to longer 

 than broad, hyaline in part or throughout except for a small internal region 

 at the base, 0.48-0.56 mm long, the apex undulate or with two to four short 

 lobes; sexual branches and sporophyte not seen. Fig. 7 a-e. 



Habitat : In forests, on stones, decaying logs and on trees. 



MEXICO: Teotalcingo, Liebmann, (type G, isotype FH) ; Chinantla, Liebmann (as 

 /3 dentibus minoribus) (G); without locality or collector, (NY). 

 GUATEMALA: Pitoreal, Sharp 8771b (TENN). 



COLOMBIA: Bogotd, Weir (NY); s.L, Lindig, the type of -V. UndigU (G) ; Cordillera 

 La Macarena, Cano Teranas, 1700 m, Schultes 11:258 (FH). 

 PERU: San Gavan, Lechler (NY). 



BOLIVIA: Ri'o Tocorani, Herzog 4073, type of M. incisobilobat urn (L) ; Yungas, 6000 

 ft, Rusby 3023 (G).. 



8. Bazzania pallide-virens (Stephani) Pulford, Bazzania Cent. S. Am. 42. 

 /. 11. 1946. 



Mastigobryum pallide-virens Stephani, Spec. Hep. 3: 473. 1908. 



Plants large, olive-green to dark green, becoming brownish ; stems to 6 em 

 or more long, with leaves to 3.5 mm broad; lateral branches 1 cm or more apart, 

 diverging at a wide angle; flagelliform branches numerous. Line of leaf inser- 

 tion curved in its upper part. Leaves spreading, rarely becoming falcate, asym- 

 metric, ovate to elongate-oblong, 1.8-2.3 mm long, 0.5-0.6 mm broad at the 

 base, narrowed a little to the transversely truncate, tridentate (often quadri- 

 dentate) apex; teeth variable, three to eight cells long, three to six cells broad 

 at the base, the margins entire; leaf-cells thin-walled, the lumina angular- 

 rounded, the trigones conspicuous, the cuticle verruculose ; cells of the apical 

 region 20-32 X 22 p.. Underleaves large, quadrate to elongate, the apex trun- 

 cate, variously lobed, irregularly and sparingly short-spinose to dentate and 

 incised, ehlorophyllose throughout or with a hyaline border of several rows 

 of cells, or hyaline throughout on some branches, the cells 24-36 X 20^. Male 

 branches occasional, the bracts and bracteoles concave, broadly ovate, shortly 

 bifid ; antheridia occurring singly. Female branches frequent, the bracts and 

 bracteoles large, the intermediate and innermost series long-laeiniate. Perianth 

 and sporophyte not seen. Fig. 8, a-d. 



Habitat: In mountain rain forests, on trees, tree roots and moist cliff faces. 



COLOMBIA: Ri'o Apaporis, Schultes # Cabrera 12548, 12560 (FH) ; Rio Kananari, 

 Schullcs 4- Cabrera 13112 (FH) ; Ri'o Kuduyari, Schultes # Cabrera 17909 (FH) ; Rio Miriti- 

 parana, Schultes 4' Cabrera 16542, 16554 (FH) ; Ri'o Paca, Schultes 4- Cabrera 19509 (FH) ; 

 Ri'o Papury, Schultes # Cabrera 19455 (FH) ; Ri'o Piraparana, Schultes 4- Cabrera 17273 

 (FH); Ri'o Vaupes, Cerro de Mitu, Schultes # Cabrera 13857 (FH) ; Yapoboda, Schultes 4 

 Cabrera 14300 (FH) ; Dep. del Valle: Bahia de Buenaventura, Cuatrecasas 19993-B (US). 



VENEZUELA: Campo Cano, Cowan 4r Wurdaclc 31275 (NY); Cerro Huachamacari, 

 Maguire, Cowan 4' Wurdaclc 31275 (NY) ; Cerro Yapacana, Maguire, Cowan # WurdacTc 30609 

 (NY); Serrania Paru, Cowan $ Wurdaclc 31428 (NY). 



BRAZIL: s.l., Glaziou 14418 (type G, isotype FH) ; Manaos and San Carlos, Spruce, Hep. 

 Sprue, (as B. bidens var.) (NY) ; the same (under B. brasiliensis n. var.) (NY) ; Rio de 

 Janeiro, Glaziou 14418 (as M. wrightii) (NY). 



ECUADOR: Mt. Chimborazo, Spruce, Hep. Sprue, with B. trichoidea, (NY). 



PERU: Tarana, Spruce, Hep. Si>ruc. ( under B. wrightii) (NY). 



