306 Clark: Hepaticae from the state of Washington 



On damp rocks. Near Hume's Glacier, Queets River valley, 

 Olympic Mountains, at an altitude of 5000 feet, Frye {78). New 

 to North America but previously known in Europe from. France 

 and England. The determination of the Washington specimens 

 was kindly confirmed by Dr. Karl Muller, of Freiburg in Breisgau, 

 Germany, one of the highest authorities on the genus Scapania. 



According to Dr. Muller* S, intermedia is a species of some- 

 what doubtful validity, occupying a position between S. wnbrosa 

 (Schrad.) Dumort. and S. dentata Dumort. and apparently con- 

 nected with the latter species by transitional forms. It may be 

 distinguished from S, wnbrosa by the rounded postical lobes of its 

 leaves and from 5. dentata by its smaller size, smaller leaf-cells, 

 and rougher cuticle. S. intermedia is also closely related to 

 S, Evansii Bryhn, a North American species which is still imper- 

 fectly known. In S. Evansii^ however, the leaves are less imbri- 

 cated, and their lobes are less coarsely "dentate. 



Scapania paludosa papillosa C. Miill. Frib. van nov. 



Reddish brown or almost black: cuticle of the leaves verrucu- 

 lose on both surfaces, the verruculae circular to elliptical in out- 

 line, measuring 4-10// in length and about 4/i in width in middle 

 of lobe but becoming smaller toward the margin, densely crowded, 

 some of the larger cells showing as many as 25 on each surface : 

 in other respects agreeing with the type. [Plate 20, figures 



I2-I7._ 



On wet rocks. Near Hume's Glacier, Queets 

 Olympic Mountains, Frye {88). A portion of the type Is preserved 



A 



paludosa C. M 



is smooth or nearly so, and It was at first thought that the rough- 

 ened cuticle in the Washington specimens would justify separating 

 them as a distinct species. Unfortunately they are completely 

 sterile and, upon submitting them to Dr. Muller for his opinion, 

 it was suggested that the wisest course would be to describe them 

 provisionally as a new variety, reserving final judgment until more 

 complete material should be available. They agree with charac- 

 teristic 5". paludosa In showing strongly decurrent leaf-lobes, with 

 blunt apices and a short more or less arched keel. The decurrent 



* Nova Acta Acad. Caes, Leop.. Carol. 83 : 117. 1905. 



