106 The Ottawa Naturalist. [August 



liberty of naming it in honor of the late Dr. Charles Schaffer of 

 Philadelphia, who spent many summers in this region and was 

 much interested in the flora of the Canadian Rockies and Selkirks. 



Specimens collected by Mr. Louis Krautter at Black Butte, 

 Siskiyou Co., California, differ markedly in certain respects from 

 those already mentioned, and are, 1 think, worthy of being 

 assigned to a separate species. I have therefore described them 

 under the name P. Krautteri. 



The distinguishing points in the above named species may be 

 mentioned as follows : 



In P. Schaefferi and P. macrophyllum, the habit is loosely 

 spreading with the leaves borne in one plane while in P. 

 Myrsinites, the habit is compact and rigid with the leaves 

 spreading in a decussate fashion ; the habit ot P. Krautteri, is 

 somewhat intermediate, the leaves closely ascending, but in one 

 plane only. The internodes in P. Myrsinities are on an average 

 much shorter than in P. macrophyllum, while in P. Schaefferi they 

 are extremely variable although seldom surpassing the shortest 

 in P. macrophyllum ; in P. Krautteri they vary slightly and are 

 intermediate between P. Myrsinites and P. macrophyllum. In P, 

 Myrsinites the petioles are suddenly contracted into the midrib, in 

 P. macrophyllum and P. Krautteri, the petioles are swollen and 

 this swelling is frequently continued into the midrib. 



The four forms vary strikingly in the shape, size, veining, 

 texture and color of the leaves. 



P. Myrsinites and P. Schaefferi produce an abundance of 

 flowers but comparatively few are found on P. macrophyllum 

 and P. Krautteri. The sepals and petals are more elongated in 

 P. macrophyllum than in P. Myrsinites while the filaments of the 

 latter are much longer in proportion to the length of the anthers. 

 The style of P. macrophyllum and of P. Krautteri is rather 

 slender and the stigma slightly bilobed; in P. Schaefferi, the stigma 

 is strongly bilobed ; and in P. Myrsinites the style is stout 

 and the stigma rounded. In both P. Myrsinites and P. macro- 

 phyllum very little fruit is produced. This is especially striking 

 in P. Myrsinites where the flowers occur in great prolusion. P 

 Schaefferi and P. Krautteri have not been seen in fruit. 



In P. macrophyllum the flowers are very markedly pro- 



