1962] 



LEAFY HEPATiCAE OF LATIN AMERICA — PART 1 



159 



TRI XI DAB : El Tneuche, Oriiger, type of .1/. toeutianum (G) j El Tueuche, Broadway 

 7100, 7100-1 (BM). 



COSTA RICA: Los Angeles fle San Ramon, Brenes 17117 (F) ; Pcralta, JZ/aro 40, 

 48a (F). 



COLOMBIA: Dep. del Voile, Puerto Merizalda Cuatrecasas 14049 (US); Rio Calima, 

 Cuatrecasas 2117 ib (US); 



VENEZUELA: Cunibrc, M affaire, Cowan # Wurdaek 30697 (NY); 



BRAZIL: subtopics, Vie, type of M. armatum (FH) ; S. Catarina, Carl 145 (ex HI). 

 Herzog) ; S. Paulo: Campo Grande, Schiffner 464, 465 (W). 



ECUADOR: Cayambe, Jameson (NY) ; Quito, Jameson (NY) ; Gualiquiza, Allioni 526 

 (as M. arcuatum) (G) ; s.)., Allioni ex II 1 ). Levier 6578 p.p. (as B. eenadorensis) (G) ; 

 Azuay, Steyermark 52687-4 (F). 



PERU: Mt. Campana, Spruce, Sprue., type of .1/. ancistrodes (iao types FH, NY). 



BOLIVIA: Mapiri, 5000 ft, Busty 3027 (as B. arcuata) (G). 



Some of the plants from South America, particularly those from Ecuador 

 and Peru, have underleaves with scattered long: teeth on the margins and more 

 conspicuously toothed ventral auricles on the lea\es. The other characteristics 

 of these plants, especially the cell size and the very large, knot-like trigones, 

 agree with those of .1/. falcatum. 



43. Bazzania hookeri (Lindenberg) Trevisan, Mvn\. 1st. Lomb. 13: 414. 1877. 



Mastigobryum hookeri Lindenberg in G. L. & N. Syn. Hep. 226. 1845. 

 Mastigobryum superbum Montague, Ann. Sci. Natur. IV. Bot. 5: 349. 1856. 

 Bazzania superba Trevisan, Mem. 1st. Lomb. 13: 414. 1877. 

 Bazzania vincentina var. subrcctifolia Spruce ms. p.p., Hep. Sprue. 

 Bazzania flavicans Spruce, Trans. Proc. Bot. Soc. Edinb. 15: 377. 1885. 

 Mastigobryum flavicans Stephani, Spec. Hep. 3: 529. 1909. 

 Mastigobryum braunianum Stephani, Spec. Hep. 3: 521. 1909. 

 Mastigobryum guadaloupense Stephani, Spec. Hep. 3: 518. 1909. 

 Mastigobryum rerrucosum Stephani, Spec. Hep. 3: 524. 1909. 



Mastigobryum douini Stephani in Herzog, Biblioth. Bot. 87: 224. /. 164, a~c. 1916. 



Plants of medium size to robust, olive-green to brown, deeply pigmented in 

 the older portions; stems to 10 cm long, with leaves to 4.5 mm broad, prostrate 

 to subereetj lateral branches infrequent, diverging at a wide angle; flagelliform 

 branches frequent, long, the leaflets large, broader than the branch, spreading, 

 broadly ovate. Leaves approximate to imbricate, mostly plane, asymmetrically 

 ovate, becoming falcate, 2-2.5 mm long, 1-1.5 mm broad at the base, narrowed 

 a little to the transversely truncate, tridentate apex, the dorsal margin strongly 

 arched from a cordate base, the ventral auricle inconspicuous, entire; teeth 

 broad, eight to ten cells long and broad, the sinus lunulate, the margins entire ; 

 leaf-cells thin-walled becoming thick-walled, with narrow pits, the lumina angu- 

 lar-rounded, the trigones large, with convex sides, often coalesced, the cuticle 

 coarsely verruculose ; cells of the apical portion 16-20 p.. Underleaves approxi- 

 mate to imbricate, round-quadrate in outline, to 1.2 mm long and broad, the 

 base deeply cordate, the auricles large, not overlapping, entire, the lateral mar- 

 gins and apex entire, repand or irregularly and bluntly toothed or lobed. Sexual 

 branches and sporophyte not seen. Fig. 43, a-h. 



Habitat : In deep tufts, on soil and on bases and trunks of trees. 

 CUBA: Sierra Maestra, Bro. Clement 351 (NY). 



JAMAICA: Blue Mountain Peak, Underwood 1485 (NY); John Crow Peak, Philipson 

 1083 (BM) ; s.l., slope of Mossman's Peak, M. Farr 730 (IJ). 



SANTO DOMINGO: Quita Espuela, Abbott 2137 p.p. (BM). 



