1962] 



LEAFY HEPATICAE OF LATIN AMERICA — PART I 



133 



COSTA RICA: Alto del Pito: Mt. San Marcas de Dotam, 1400 m, Toudue 3009 (G), 

 Tonduz 11618 (NY); La Estrclla, Standley 39106, 39117, 39403 (US); El Mufieco, Standley 

 51338, 50887, type of B. portoricensis var. pycnodictyon (US) ; Santa Clara, Cartago, E. Torres 

 BS0-1 (F). 



COLOMBIA: Bogota, Cuervo, type of M. cuervi (B) ; Antioquia: s.l., Wallis (as M. bogo- 

 tense) (G) ; Ri'o Kananari, Schultes # Cabrera 13117 (FH) ; Villavicencio, Alston 7583 (BM) ; 

 Norte de Santander, Cuatrecasas, Schultes # Smith 12448t (US) ; Dep. del Valle, Cuatrecasas 

 14951b (US); s.l., Wallace (NY). 



VENEZUELA: near Maturin, Alston 5583 (BM) ; Estado Bolivar, Chimanta Massif, 

 Stcyermdrk 75578 (NY). 



FRENCH GUIANA : Cayenne, Perrottet (as M. stoloniferum) (G) ; s.l., Lcprieur 292 

 (as M. stoloniferum) (G). 



ECUADOR: Gualiquiza, Allioni (ex Hb. Levier 6574, 6575, as Jf. lindigii) (G) ; Ori- 

 ente-V. Bomboiza, Allioni 343 (as M. cuervi) (G) : Tungurahua, Spruce, Hep. Sprue, (as B. 

 vincentina var. subrectifolia), p.p. (NY). 



BRAZIL: Manaos, Vie, the type of M. uleanum (FH) ; s.l., Sellow (as M. martianum) 

 (FH, G) ; St. Catarina, Reitz 2.137a, 2.556 (HBR) ; s.l., Vie 327 (as M. lindigii) (G) ; S. 

 Paulo: Alto da Serra, Schiffncr 1064 (W) ; Brasso Grande, Schifner 1313, 1547 (W) ; s.l., 

 Jack (as M. brasiliense) (G) ; Petr6polis, Boring (G). 



PERU: Campana, Spruce, isotype of B. viridissima (FH); Tanatara, Lechler (as .V. chil- 

 i nst and M. scutigerum /3 lechleri) (G). 



BOLIVIA: Casapi, Mathews (FH, NY); Comarapa, Herzog, type of M. hariotii (L) ; 

 Yungas, Troll 89 (Hb. Herzog). 



18. Bazzania chimborazensis Spruce, Trans. Proc. Bot. Soc. Edinb. 15: 376. 

 1885. 



Mastigobryum chimborazensc Stephani, Spec. Hep. 3: 527. 1909. 



Plants robust, yellow-green becoming olive-green to brown; stems to 10 cm 

 or more long, with leaves 4-5 mm broad ; lateral branches infrequent, diverging 

 at a wide angle. Rhizoids abundant from the scale leaves of the flagelliform 

 branches. Line of leaf insertion curved in the upper part, the end recurved, 

 hook-form. Leaves spreading, imbricate, plane to deflexed, asymmetric, oblong, 

 somewhat decurved, averaging 2.25 mm long, to 1.6 mm broad at the base, nar- 

 rowed a little to the irregularly 3- or occasionally 4-toothed apex; teeth mostly 

 large, acute, three to eight cells long, three to eight cells broad at the base, the 

 sinuses acute, the margins obscurely serrate ; leaf -cells thin-walled, the trigones 

 small with convex sides, the lumina angular-rounded, the cuticle verruculose ; 

 cells of the apical portion 18-22 X 18 Underleaves large, much broader than 

 the stem, imbricate, 1 mm or more long and 1 mm broad, attached in a straight 

 or slightly curved line, the base rounded to subcordate, the lateral margins sinu- 

 ate with broad lobes, the apex lobed and toothed, very often with some cells of 

 the margin hyaline, cells as in the leaf. Male and female inflorescences and 

 sporophyte not seen. Fig. 18, a-e. 



Habitat : In tufts or mats on tree trunks and branches and on logs in forests. 



COLOMBIA: Dep. del Valle: Rio Cajambre, Cuatrecasas 17019B, 17024-B, 17059-B (US) ; 

 Cordillera Oecid., Cuatrecasas 22129-B. 



BRAZIL: Man&os, Spruce, Hep. Sprue, as B. brasiliensis (NY); Minas Gerais: Caldas, 

 Mosen (G) ; S. Paulo: Itapeceriea, Brasso Grande, Schif ner 1320 (W). 



ECUADOR: Andes Quitenses, Mt. Chimborazo, 1300 m, Spruce Hep. Sprue. Tno. 1131, 

 (isotypes G, NY), other packets, Chimborazo, Spruce (G). 



The species is similar to robust plants of B. breateliana in general aspect. It 

 may be distinguished by its characteristically irregularly lobed and toothed 



