1962 



LEAFY HEPATICAE OP LATIN AMERICA — PART I 



147 



BRAZIL: s.l., Martivs, type of M. martianum (G) ; Apiahy, Puiggrari 761a (G) ; S. Paulo: 

 Alto da Sena, Schifner 1610 (W) ; Rio Grande, Schiffncr 1095 (W) ; near Barra Mansa, 

 Itapecira, Schiffner 1582 (W) ; Santos: St. Vincente, Horcau 10 (as f. robustior) (G) ; 

 Santos, Mosen 99 (as M. vincentinum) (G). 



ECUADOR : s.l., Allioni (Hb. Levier, 6406), type of M. ccuadorensc (G) ; C. Bomboiza- 

 Gualiquiza, Allioni 525, 724 (G). 



This species is distinct because of its arcuate leaves with a very broad base 

 and a conspicuous enlarged rectangular ventral auricle, and its large, cordate 

 underleaves, broadest at the base. 



Section 2. Connatae 



The plants of this section are of medium size to large, with three-toothed 

 leaves (mostly entire in B. schwaneckiana) , that may be serrulate to dentate in 

 the apical part. They are inserted in an oblique line which is more or less curved 

 in the upper part. The underleaves are attached in a straight line and are 

 connate with the ventral bases of the leaves along one or both sides of the stem. 

 (In many stems this attachment is evident only under high magnification.) 

 Most of the species, but not B. fendleri, are highly variable and appear to grade 

 into one another, so that there is often a scries of forms to which it is difficult 

 to assign names, and decisions become arbitrary. There are three groups of 

 species: B. fendleri of tropical America, in which each underleaf is joined to 

 one leaf by a broad base, always the same side of the stem; the group in the 

 West Indies in which the underleaves are connate on one side with one row of 

 leaves; and the group in southern South America, with certain species or related 

 species also in Xew Zealand, Australia, etc.. in which the underleaves are joined 

 to both rows of leaves. 



32. Bazzania fendleri (Stephani), Pulford, Bazzania Cent. S. Am. 105. /. 47. 

 1946. 



Mastigobryum fendleri Stephani, Spec. Hep. 3: 436, 468. 1908. 



Plants of medium size to large, whitish to light greenish-brown, more strongly 

 pigmented in the older portions ; stems to 5 cm long, with leaves to 3.5 mm 

 broad, prostrate to ascending; lateral branches 5 mm or more apart, diverging 

 at a wide angle; flagelliform branches numerous, long. Leaves imbricate, convex, 

 ascendent, a little deflexed when dry, asymmetrically ovate, to 1.5 mm long, 

 0.7 mm broad at the base, narrowed a little to the more or less transversely 

 truncate, obscurely tridentate apex ; teeth one to three cells high, two or three 

 cells broad at the base, the sinuses lunulate, the margins entire; leaf -cells thick- 

 walled, the trigones large, with irregular, rounded sides, becoming confluent, 

 intermediate thickenings sometimes present, the lumina angular-rounded, the 

 cuticle verruculose; cells of the apical portion averaging 16 /x in diameter. Under- 

 leaves large, twice as broad as the stem, round-quadrate, connate with one leaf 

 for a third their width, averaging 0.9 mm broad and long, the margins recurved, 

 the apical margin entire to faintlv four-lobed. Sexual branches not seen. Fig. 

 32, a-e. 



Habitat : Not given. 



VENEZUELA: Valencia, Fendler (type G, isotype FH). 

 BRAZIL: Rio de Janeiro, Gaudichaud (NY). 

 ECUADOR: Cayambe, Jameson (NYV 



