EVANS: HEPATIC-E COLLECTED IN SOUTHERN PATAGONIA. 51 



each side a small tooth at about the middle, otherwise entire : leaf-cells 

 polygonal, thin-walled, slightly or not at all thickened at the angles : ? 

 inflorescence terminal, sometimes innovating, bracts in two or three pairs, 

 less obliquely inserted and slightly larger than the leaves but scarcely 

 different from them in shape ; bracteole ovate, bifid about one third and 

 bearing a small tooth on each side above the middle ; perianth (young) 

 campanulate, 3-keeled but without wings, 3-lobed at the wide, open 

 mouth and coarsely and irregularly toothed : c? infloresence borne in the 

 course of a branch, bracts in several (about 5) pairs, imbricated and con- 

 volute, similar in shape to the stem-leaves when spread out, but expand- 

 ing at the antical base into an inflated pouch usually tipped with a tooth ; 

 underleaves not modified. 



Stems .5-1 cm. long, 0.2 mm. in diameter; leaves (large) 0.75 mm. 

 long and wide ; underleaves (large) 0.35 mm. long, 0.3 mm. wide ; leaf-cells 

 at edge of leaf 16 p, in middle 21 JJL and at base 25 /JL in diameter; peri- 

 chaetialbracts i mm. long, 0.85 mm. wide ; bracteole 0.95 mm. long, 0.7 mm. 

 wide; perigonial bracts 0.7 mm. long, 0.5 mm. wide. 



Lapataia. 



This distinct little Lophocolea does not seem to have been recorded 

 since its original discovery in the Falkland Islands. Mr. Hatcher's speci- 

 mens agree very closely with the sterile type material in the Taylor her- 

 barium, and I have given a full account of the species because the original 

 description is far from complete and the figure given in the Flora Antarc- 

 tica does not adequately represent the plant. Fruiting stems seem to be 

 very rare, the plant apparently spreading by means of small branches, 

 which, when dry, easily become detached. 



The authors of Jungermannia rigens compared it with the European 

 y. francisci Hook., and in the Synopsis it is placed close to that species; 

 the position of the branches, however, which are produced near the posti- 

 cal basal angle of the subtending leaves would at once remove it from the 

 genus Cephalozia in which J. francisci is now included. L. rigens 

 belongs in the puzzling group of Lophocolea with bifid leaves. Its small 

 size and yellowish-green color, the curious rolling up of its leaves, which 

 often gives the branches a worm-like appearance and the slight modifica- 

 tions which its bracts undergo will serve to distinguish it. 



