1 9(52 | 



LEAPT HEP ATI CAE OP LATIN" AMERICA — PART I 



1 .">.) 



Habital : In tut'ts or mats on rocks and bases and trunks of trees. 



CHILE: Corral, Thaxter 68 (MICH); Valdivia, without collector (G) ; Chiloe Isl., San 

 Pedro, Skottsberg (as M. creberrimum) (G). 



STRAITS OF MAGELLAN: Smyth Channel, without collector, ex Hb. Beschcrelle (as 

 M. involutum f. minor) (G). 



PATAGONIA: Pat. austral., Skottsberg 621 p.p./'OS (G) ; Pat. occid., Skottsberg 876, 

 type of .1/. creberrimum (G). 



JUAN FERNANDEZ ISLANDS: Masatierra, Skottsberg 50, lectotype, and 118 (Swed. 

 Exped. Pat. Feuerland, 1907-1909) (G); Masatierra, Skottsberg Bazzania nos. 1-4, 6, 7, p.p. 

 8, .9, 11-14 (S-PA). •• 



Bazzania novae-zelandiae (Mitten) Bescherejtle & Massalongo. 



Although this New Zealand species has been reported from southern South 

 America, no specimens that fit the description have been seen. 



Section 3. Fissistipulae 



The plants of this section have sharply three-toothed leaves in which a vitta 

 or ventral appendages or auricles are not developed. The underleaves are divided 

 to the middle into usually four long lobes or teeth. They are not connate with 

 the leaves and are not auriculate at the base. 



40. Bazzania chimantensis Fulford, Bryologist 63: 88-91. /. 1-7. 1960 [1961]. 



Plants of small to medium size, in large depressed brown mats ; stems yellow- 

 brown, with greenish-brown growing tips; stems slender, 6-8 cm long, with 

 leaves to 1.5 mm broad, often smaller; lateral branches occasional, forming an 

 acute angle ; flagelliform branches frequent, long, or occasionally leafy. Rhizoids 

 not seen. Line of leaf insertion curved in the upper part. Leaves widely spread- 

 ing, distant to approximate, usually plane, brittle, often broken but not truly 

 caducous, variable in outline, rectangular or more rarely ovate, the margins 

 uneven and conspicuously crenulate throughout, averaging 0.75-0.8 mm long, 

 0.45-0.5 mm wide at the base, little narrowed to the transversely or more rarely 

 obliquely truncate tri-(bi-)dentate apex; teeth long, mostly equal, 2-A cells 

 broad at the base, to 12 cells long, with half the length a crenulate, uniseriate 

 tip, the sinuses deep, usually narrow, acute ; leaf -cells of the apical portion below 

 the teeth 36-45 X 36 /x, with very large spherical trigones separated by narrow 

 pits or coalesced to form a very thick cell wall, the cells of the rest of the leaf 

 similar, scarcely larger, a vitta not differentiated, the lumina stellate, the cuticle 

 faintly verruculose. Underleaves conspicuous, divided to the middle into four 

 slender, lanceolate to linear teeth, distant to approximate, little broader than 

 the stem, subquadrate-orbicular in outline, tending to be squarrose, averaging 

 0.36 mm long and broad, the margins convex or more rarely with a broad lobe, 

 the teeth two or three cells broad at the base, ending in a uniseriate row of 2-A 

 crenulate cells, or 2-celled for most of the length ; the cells as in the leaves. Male 

 and female inflorescences and sporophyte not seen. Fig. 40, a-f. 



Habitat : In large brown mats on a vertical sandstone boulder on a forested 

 slope. 



VENEZUELA: Estado Bolivar, Chimanta Massif: vicinity of Camp 3, northwestern 

 part of Abacapa-tepui, 1300 m, Steyermark 75216 in 1953, (type F, isotype NY). 



There are no other species of this section in Latin America, nor does the 

 species appear to be closely related to any other American species. 



