﻿Evans : Hepaticae of Southern Patagonia 423 



by the Wilkes Expedition. The drawing represents a plant which 

 is identical with Dr. Hatcher's specimens. As, however, Junger- 

 mannia humilis Hook. f. & TayL* seems to have been a compos- 

 ite species and as Mittenf has applied the name to a plant without 

 underleaves, it seems wisest not to change the name of De Notaris' 

 plant. Jungermannia humilis is apparently not represented in the 

 Taylor herbarium. 



35. Lophocolea rigens (Hook. f. & Tayl.). 



Jungermannia rigens Hook. f. & Tayl. Lond. Jour. Bot. 3 : 

 46 1 . 1 844. 



Dioicous : densely caespitose, yellowish-green ; stems ascend- 

 ing and giving off numerous simple or subdivided, ascending or 

 erect, lateral branches, sparingly radiculose, the radicles in clusters 

 at the bases of the underleaves : leaves imbricated, obliquely in- 

 serted, erect-spreading, strongly concave or convolute (especially 

 on the branches), broadly ovate or orbicular, bifid about one-fourth 

 with acute, obtuse or lunulate sinus and acute teeth, otherwise en- 

 tire, more or less decurrent at antical base : underleaves ovate, bi- 

 nd one-third or more with narrow sharp lobes, usually bearing on 

 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 

 2 or 3 pairs, less obliquely inserted and slightly larger than 

 the leaves but scarcely different from them in shape ; bracteole 

 0v ate, 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 

 ""regularly toothed : $ inflorescence borne in the course of a 

 branch, bracts in several (about 5) pairs, imbricated and convolute, 

 similar in shape to the stem-leaves when spread out but expanding 

 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. 

 w »de ; leaf-cells at edge of leaf 1 6 fi, in middle 2 1 // and at base 

 ~S ft in diameter ; perichaetial bracts 1 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. 



Lapotaia. 



Lond. Jour. Bot. 3 : 468. 1844. 

 t Botany of Kerguelen Island : Transit of Venus Expedition, 34. 1874. 



