Hepaticae : Yale Peruvian Expedition of ipii. 



311 



In spite of the few and irregular branches in P. pauciramea, it 

 belongs to Spruce's section Frondescenies and has several relatives 

 among the species already 

 known from South America. 

 P. montana Spruce, from 

 Campana, Peru, is one of 

 these, but in this species the 

 leaves narrow more markedly 

 toward the apex than in P. 

 pauciramea, the spines are 

 shorter and broader, the 

 walls of the leaf-cells do not 

 appear uniformly thickened, 

 and there are no conspicuous 

 underleaves. In P. aniazo- 

 nica Spruce, another allied 

 species of the Amazonian 

 Plain, extending up the 

 eastern slopes of the Andes, 

 the margin of the leaves is 

 spinose throughout, even at 

 the antical base, and the 

 spines are more numerous, 

 numbering about forty in all. 

 In this species, further, the 

 leaves are subtriangular in 

 outhne, both antical and 

 postical margins tending to 

 straight in the outer part. 

 Both P. montana and P. 

 amazonica are known to the writer from specimens distributed 

 by Spruce. 



Figure 5.— Plagiochila pauciramea Evans 



A. Leaf, dissected from the stem, X 17. 



B. Cells from the middle of a leaf, those 

 in the lower part of the figure drawn at 

 a lower focus, X 225. C. Tooth from near 

 the middle of the postical margin of a 

 leaf, X 225. The figures were drawn from 



the type specimen. 



12. Plagiochila striolata sp. nov. 



On dead wood, Lucma, 7,000 feet, August 7, 1911. 



Yellowish to brownish green, not glossy, growing in compact tufts : stems 

 mostly 1.5—2 mm. long, about 0.25 mm. in diameter, rigid, ascending, 

 sparingly and irregularly branched, the branches all intercalary, obliquely 

 spreading, very rarely subdivided, similar to the stems but usually with 

 smaller leaves : leaves alternate, contiguous to loosely imbricated, obliquely 

 spreading (at an angle of about 60 degrees), antical portion more or less 

 convex toward the base, postical portion slightly concave, apical portion plane 



