1966] 



LEAFY HEPATICAE OF LATIN AMERICA — PART II 



265 



The species is similar to M. campanense in size and habit, cell size and mamillose 

 thickenings, but in M. campancnse the wing while small, is well developed, the underleaves are 

 larger, and the mamillae are not so large. M. bolivarensc differs from M. parvistipulum in that 

 in the latter the stems are larger, complanate, the leaves are flattened, with a sharp keel and 

 a long broad wing, and the leaf margins are serrate and dentate throughout. 



12. Micropterygium campanense (Spruce ms) Reimers, Hcdwigia 73: 157. 



f.6. 1933. 



Micropterygium campanense Spruce nom. nud. Trans. Proc. Bot. Soc. Edinb. IS: 385. 

 1885. 



Leafy stems of small to medium size, compact in tufts or mats, yellow-brown, 

 scarcely flattened, prostrate from a branched rhizome system; stems 1-1.5 mm 

 long, with leaves, to 0.7-1.0 mm broad, lateral branches occasional. Leaves 

 spreading, ascendent in the outer part, broadly ovate, to 0.5 mm long, concave, 

 ridge-keeled in the upper part, the wing of three to five rows of cells extending 

 from the apex to the middle of the leaf or less, the margins crenulate and distantly 

 serrate; cells of the apical portion more or less round-quadrate, 12-15 p., the 

 walls thin, trigones small but distinct, the outer surface convex and bearing a 

 conspicuous mamilla, the cuticle smooth. Underleaves large, orbicular to obovate, 

 broader than the stem, concave, the upper margin with two to four obscure lobes 

 or teeth. Inflorescences and sporophyte not seen. PI. 60. Fig. 12, a-c. 



Habitat: Sandy banks along streams, bases of trees, rocks, logs, and stumps, 

 in the rain forest. 



VENEZUELA: Amazonas: Rio Orinoco, Cerro Yapacana, Cumbre, 1200 m, Maguire, 

 Cowan, Wurdack 80695 d 1 (NY) ; Rio Cunucunuma, 1200 m, Maguire, Cowan, Wurdack 29911 

 <$ (NY) ; Estado Bolivar: se Cerro Venamo, Rio Venamo, 1000 m, Steyermark & Dunsterville 

 92259 p.p. (VEN) ; Auyan-tepui, tributary of Rio Churun, 1760 m, Steyermark 93350 p.p. (NY). 



PERU: Mt. Campana, Spruce, Hep. Sprue, (isotype NY). 



13. Micropterygium trachyphyllum Reimers, Hedwigia 73: 186. /. 15-19. 



1933. 



Jungermannia pterygophyllum Nees var. /3 conferta Lehmann, Pug. PI. 6: 59. 1834. 

 Micropterygium vulgare Nees, Lindenberg & Gottsche, var. /3 in G. L. & N. Syn. Hep. 



234. 1844. [excl.loc. cit. : "Mart. icon. . . ."] 

 Micropterygium vulgare Nees, Lindenberg & Gottsche, var. /3 in Lindenberg & Gottsche, 



Spec. Hep. VIII-XI: 114. PI. 21, /. 11-14- 1851. [excl. loc. cit.: "Mart. icon. . . ."] 

 Micropterygium pterygophyllum (Nees) Trevisan p.p. Mem. 1st. Lomb. III. 4: 413. 1877. 

 Micropterygium pterygophyllum Spruce, Trans. Proc. Bot. Soc. Edinb. 15: 384. 1885. 



[excl. loc. cit.: "J. pterygophyllum Nees in Mart. Fl. Bras, icon., T. 19."] 

 Micropterygium pterygophyllum Spruce apud Stephani, Spec. Hep. 3: 543. 1909. [excl. 



loc. cit.] 



Micropterygium trachyphyllum var. cubense Reimers, Hedwigia 73: 188. /. 15, 1-3. 1933. 

 Micropterygium trachyphyllum var. jamaicense Reimers, Hedwigia 73: 190. /. 16, 1-5. 

 1933. 



Micropterygium trachyphyllum var. guadeloupense Reimers, Hedwigia 73: 190. /. 17. 

 1933. 



Micropterygium trachyphyllum var. guyanense Reimers, Hedwigia 73: 192. /. 18. 1933. 

 Micropterygium trachyphyllwn var. brasiliense Reimers, Hedwigia 73: 195. /. 19. 1933. 



Leafy stems of medium to large size, dull, light to olive-green or brown, 

 complanate, ascending from a branched rhizome, in extensive cushions or mats 



of a leaf, near the apex, X 700. 12 c. Superficial papillose mamillae of the leaf cells, profile 

 view, X 700. 



Figure 11 drawn from the type; fig. 12 from an isotype. 



