1962] 



LEAFY HEPATICAE OF LATIN AMERICA — PART I 



169 



52. Bazzania tayloriana (Mitten) Fulford, Bazzania Cent. S. Am. 157. f. 57. 

 1946. 



Mastigobryum taylorianum Mitten in J. D. Hooker, Bot. Ant. Voy. 2- (Fl. N. Zel.): 147. 

 pi. C, f. 5. 1854. 



Plants small, pale, glaucous-green, becoming deeply pigmented with brown; 

 stems slender, delicate, to 3 cm or more in length, with leaves mostly 1.5 mm 

 broad, prostrate; lateral branches occasional, diverging at a wide angle, the 

 ventral branches frequent, usually leafy. Leaves approximate to subimbricate, 

 vittate, spreading, plane, becoming somewhat deflexed beyond the middle, sub- 

 rectangular, 0.7-1.0 mm long, mostly 0.5 mm broad at the base, little narrowed 

 to the transversely truncate, conspicuously tridentate apex; teeth large, spread- 

 ing, eight to ten cells long, four to six cells broad at the base, the sinuses deep, 

 acute to rounded, the margins entire; leaf-cells quadrate in outline, uniformly 

 thick-walled except those of the vitta, the lumina rounded, the cuticle very 

 abundantly minutely punctate ; cells of the apical portion mostly 16 X 16 ^, of 

 the vitta, to 32 X 24 ft, the walls thin, the trigones conspicuous. Underleaves 

 distant, hyaline throughout or a few cells at the base chlorophyllose, suberec- 

 tangular in outline, broader than the stem above, 0.22-0.35 mm long, to 0.28 mm 

 broad above, divided from one-half to one-fourth or less into usually four equal, 

 blunt teeth, four to ten cells long, two or four cells broad, the sinuses acute, the 

 margins entire, the cells quadrate to rectangular in outline, hyaline, the walls 

 uniformly thickened. Sexual branches and sporophyte not seen. Fig. 53, a-d. 



Habitat : In depressed mats on soil or logs among other bryophytes. 



COLOMBIA: Bogota, 4000 ft, Weir (NY). 



NEW ZEALAND: North Island, Zotov (NY); N. Island, Colenso (type NY); Sinclair 

 (NY); Kaipara, Mossman 760d (NY). 



54. Bazzania nitida (Weber) Grolle, Revue Bryol. Liehenol. 29: 210. 1960. 



J ungermannia convexa Thunberg, Prodr. PI. Cap. 173. 1794. 

 Jungermannia nitida Weber, Prodr. 43. 1815. 



Mastigobryum richardianum Mitten in Hooker, Bot. Ant. Voy. 2- (Fl. N. Zel.) : 147. 1854. 

 Bazzania convexa (Thunberg) Trevisan, Mem. 1st. Lomb. 13: 414. 1877. 

 Bazzania carlii, Herzog, Beih. Bot. Centr. Abt. B. 61: 565. /. 1, e-h. 1942. 



Plants pale, whitish to yellow-green ; stems very slender, to 3 cm or more in 

 length, with leaves to 1.5 mm broad, prostrate ; lateral branches few, diverging 

 at a wide angle, ventral branches frequent, usually leafy, sometimes flagelliform. 

 Leaves vittate, spreading, approximate to subimbricate, nearly straight, the teeth 

 and a little of the apical portion usually deflexed, asymmetrically ovate, 0.7-0.9 

 mm long, mostly 0.35 mm broad at the base, narrowed a little to the trans- 

 versely truncate, mostly obscurely tridentate (often entire), decurved apex; 

 teeth short-triangular, one or two cells long and wide, the sinuses lunulate, the 

 margins entire; leaf-cells quadrate to rectangular in outline with uniformly 

 thickened walls except the cells of the vitta, the lumina rounded, the cuticle 

 verruculose; cells of the apical portion, margins, and dorsal base averaging 

 16 X 16 /i, those of the vitta to 32 X 24 /*, with thin walls and conspicuous tri- 

 gones. Underleaves distant, hyaline above, subquadrate in outline, averaging 

 0.28 X 0.28 mm, mostly one-third to one-half divided into four more or less 

 equal, acute teeth, the teeth mostly five cells long, two to four cells broad at the 



