424 Farr on British Columbian Plants. 



C. Canadensis and C. Suecica. Material hitherto collected in 

 this region has been reported as C. Canadensis. Many of 

 the flowering shoots bear fully developed opposite pairs of 

 leaves, but without trace of whorled leaves. In shape and size 

 these approximate rather more to those of C. Canadensis, but 

 not infrequently their bases are rounded so as to approach 

 very closely those of C. Suecica. In diagnostic descriptions 

 the leaf veins of C. Canadensis are said to be pinnate and 

 this is generally true; in C. Suecica the veins are said to 

 arise at or near the base of the leaf, but leaves are not 

 infrequent that show marked pinnation ; in the present form 

 the veins occasionally arise near the base of the leaf. The 

 flowers of C. Canadensis are described as greenish, those 

 of C. Suecica purple. The present specimens conform to the 

 latter description, and this has already been noted by Pursh, 

 who says in respect to C. Canadensis "flowers purplish- 

 white." The stones of C. Canadensis are stated to be smooth, 

 globose, a little longer than broad, those of C. Suecica are 

 defined as flattened, channeled on each side and about as 

 broad as long. The stones of the specimens now under con- 

 sideration exhibit an intermediate condition, but approximate 

 rather more to those of C. Suecica. 



In view of these marked variations, it seems quite reason- 

 able to consider that the Glacier plants represent perfect 

 transitional types in every detail from the two supposed 

 species, and verify the wisdom of the observation made in 

 th'e "Botanical Magazine," No. 280, that Cornus Canadensis 

 "is for the most part readily distinguished from Cornus 

 suecica, by the leaves all growing in a whirl at the top of the 

 stem, for the opposite pair about the middle are mere 

 stipules ; Pallas doubts if they are not both varieties, and says 

 the specimens he has seen from Kamschatka and Bering's 

 Island, exactly correspond with garden specimens from this 

 country and native ones from Canada, but it is not very 

 improbable that Cornus Canadensis may be found in these 

 places as well as Cornus suecica; we have specimens of both 



