LKAFY HKI'ATK'AF. OF LATIN AMBBIOA PART I 



143 



28. Bazzania crassidentata Pulford, Bull. Torrey Club 86: 338. /. 54-56. 1959. 



Plants very large, yellow-brown becoming dark brown; stems robust, 5-10 

 em long, with leaves to 5 mm or more broad, prostrate or ascending ; lateral 

 branches 1 cm or more apart, diverging al a wide angle; flagelliform branches 

 frequent; rhizoids scarce. Leaf insertion curved in the upper half. Leaves 

 approximate to imbricate, spreading, with a tendency to become a little falcate, 

 linear-lanceolate, to 2.5 mm long, to 1 mm broad at the base and tapering to a 

 narrow, 0.3-0.5 mm, obliquely truncate, coarsely tridentate apex; teeth large, 

 variable, mostly acute, five to ten cells long, three to five cells wide at the base, 

 the basiscopic tooth always much smaller, the sinus deep, acute; leaf -cells thin- 

 walled, but with very large knot-like, triradiate thickenings, the pits scarcely 

 visible, the lumina stellate, often becoming rounded, the cuticle faintly verru- 

 culose ; cells of the teeth averaging 26 X 29 p., and of the lumina below the teeth 

 45 X 27 fx. Underleaves broader than the stem, subquadrate to oblong, the base 

 cordate, the apical margin undulate to faintly lobed, occasionally with a tooth 

 at the end. Leaves of the flagelliform branches large, scale-like, to 0.24 mm long. 

 Male branches short, the bracts broadly ovate, concave. Female branches occa- 

 sional, the bracts and bracteoles of the intermediate and innermost series long, 

 broadly ovate, divided to one-third of their length into four crenate segments 

 with cells averaging 0.65/* long. Perianth long, the mouth of numerous cilia. 

 Sporophyte not seen. Fig. 28, a-f. 



Habitat : In mats and deep tufts, on trunks of trees and over tree bases 

 and soil. 



COLOMBIA: Dep. del Valle, Rio Calima, Cuatrecasas 21087b (US). 



VENEZUELA: Cumbre, along west rim, s from Camp Cano, Cowan 4' Wurdack 31324 

 (type NY). 



29. Bazzania jamaicensis (Lehmann & Lindenberg) Trevisan, Mem. 1st. Lomb. 



13: 414. 1877. 



Herpetium janwicense Lehmann & Lindenberg in Lehmann, Pug. PI. 7: 7. 1838. 

 Mastigobryiim jamaieense Lehmann & Lindenberg in G. L. & N. Syn. Hep. 223. 1845. 

 Mastigobri/u in chamac card ion Herzog ms. (noinon nudum.) 

 Mastigobryum caracanitm Stephani, Spec. Hep. 3: 525. 1909. 



Bazzania jamaicensis var. chamaecardia Herzog, Rev. Bryol. Lichenol. 11: 19. 1938. 



Plants large, olive-green to brownish-green, strongly pigmented with brown ; 

 stems stout, to 10 cm or more long, with leaves to 4 mm broad, prostrate to sub- 

 erect ; lateral branches frequent, mostly more than 5 mm apart, diverging at a 

 wide angle ; flagelliform branches frequent, long, often branched. Leaf insertion 

 curved in its upper half. Leaves imbricate, convex, strongly deflexed even when 

 moist, asymmetrically ovate, a little falcate, to 2 mm long, 1-1.5 mm broad at 

 the base, narrowing a little to the rather broad, transversely truncate, irregularly 

 tridentate, apex; teeth acute, narrow to broad, some obscure, two to six cells long, 

 two to nine cells broad at the base, the sinuses acute to lunulate; leaf-cells thin- 

 walled, the lumina angular-rounded, the trigones small, conspicuous, soon becom- 

 ing coalesced in the marginal and apical regions, the cuticle smooth to faintly 

 verruculose; cells of the apical region averaging 20 X 20 /x. Underleaves approxi- 

 mate to imbricate, broader than the stem, appressed, broadly reniform from an 

 auricled base, verj- concave when seen from above, 0.65 mm long, 0.8-1 mm 

 broad at the base, the margin entire and often deep brown, the cells 22-32 p 

 long and broad, the lumina angular-rounded, the trigones small, conspicuous, 



