1962] 



LF.AFY HEPATIC'AK OF LATIN AMERICA — FART 1 



125 



While the plants of B. stolonifera may show considerable variation in the 

 width of the hyaline border of the underleaves, they may be readily distin- 

 guished from the other South American species with hyaline cells on the 

 underleaves, in that the hyaline cells are always thin-walled and the chlorophyl- 

 lose cells have distinct trigones. 



10. Bazzania serrata Fulford, Bull. Torrey Club 86: 321. /. 17-30. 1959. 



Plants of medium size, dull olive-green, yellowish-green at the growing tips, 

 in tufts or mats ; stems to 4 cm long, with leaves to 3 mm broad ; lateral branches 

 1 cm or more apart, diverging at an acute angle, flagelliform branches frequent. 

 Line of leaf insertion curved in the upper part. Leaves widely spreading, 

 imbricate, plane, often caducous, serrate throughout, averaging 2 mm long, 

 0.6 mm broad at the base, little narrowed to the 1-3-toothed apex, the teeth 

 three to six cells broad at the base, two to five cells high, the sinuses broad ; 

 cells of the apical portion 24-27 X 18 p., the trigones conspicuous or coalesced, 

 those of the median portion 36 (or more) X 27 p., suggesting a vitta; the cuticle 

 coarsely verruculose. Underleaves imbricate, round-quadrate in outline, mostly 

 0.46 mm long and wide, with a narrow hyaline border surrounding the chloro- 

 phyllose part, or hyaline nearly to the base, the margins serrulate from project- 

 ing cells. Female branches several on a stem, the bracts and bracteoles oblance- 

 olate, the bracts of the innermost series to 2.4 mm long (immature), divided to 

 one-third their length into three or four long, narrow, crenate laciniae. Perianth 

 to 5 mm long, ovoid-cylindric, contracted to the long-laciniate mouth. Male 

 branches and sporophytes not seen. Fig. 10, a-g. 



Habitat : Forests at 2150-2230 m alt. 



COLOMBIA: Cordillera Oriental, Norte de Santander: Sarare, 2150-2250 m, Cuatreeasas, 

 Schultes 4- Smith 12 4 48 z (type US). 



11. Bazzania chilersis (Stephani) Fulford, Bazzania Cent. S. Am. 51. f. 15. 



1946. 



'Sfastigo'briium chilense Stephani, Hedwigia 24: 247. pi. 2. f. 1. 1885. 

 Masiigoiryum bogotense Stephani, Hedwigia 24: 246. pi. 1. f. 1. 1885. 



Plants of medium size, dark green, pigmented with brown ; stems to 3 cm 

 or more long, Avith leaves to 3 mm broad ; lateral branches frequent, diverging 

 at a wide angle ; flagelliform branches frequent. Line of leaf insertion curved 

 in its upper part. Leaves imbricate, plane, becoming a little deflexed when 

 dry, asymmetrically ovate, straight or nearly so, 1.4—1.8 mm long, 0.6 nun 

 broad at the base, narrowed to the transversely truncate, tridentate apex; 

 teeth large, eight to twelve cells long, five to ten cells broad at the base, the 

 margins entire ; leaf-cells thin-walled, with conspicuous, often confluent trigones, 

 the lumina angular-rounded, the cuticle strongly verruculose ; cells of the apical 

 portion mostly 20 X 20 p.. Underleaves distant to imbricate, broader than the 

 stem, round-quadrate, 0.43 mm long and 0.5 mm broad, with a hyaline border, 

 the apex truncate, mostly straight, crenulate, the hyaline border of two to four 

 rows of cells at the apex and one or two rows of cells on the lateral margins, 

 the cells averaging 16 p., the walls thin, the trigones small but distinct. Sexual 

 branches not seen. Fig. 11, a-c. 



Habitat: Not given. 



