Cornaceæ. 145 



colour strongly when treated with Hansen's haematoxylin. 

 The cells containing these lumps or living hyphae contain 

 no starch, other cells are rich in this. 



Cornus canadensis L. 



Sertorius, 1893, p. 619; Lovell, 1898, p. 386; Holm, 

 1895, p. 544; Meehan, Th., 1892, p. 376; Meehan, W., 

 1893, p. 211. 



Cornus canadensis (fig. 

 10) is found most frequently 

 in North America; it is met 

 with throughout Canada, 

 with the exception of the most 

 northern parts, from New 

 Foundland and Labrador to 

 Southern Alaska. Its south- 

 ern boundary passes through 

 the states of West Virginia, 

 Ohio, Indiana, Wisconsin, ü- m ^ j ■ 



' ' 'rig. 1Ü. Cornus canadensis 



Minnesota, Nebraska, Colo- from Inuarudgligak m Greenland, abont «/4 



rado and California. It is 



found also in the northern Islands of Japan, and now, 

 as mentioned in the preface, in the most southerly 

 part of Greenland, in the small, remotely situated island, 

 Inuarudgligak. It does not reach as far North as Cornus 

 suecica, which e. g. is met with at Baffinsland, where С 

 canadensis is not found, whereas it is found consider- 

 ably further South. In North America C. canadensis has 

 its habitat in damp, cold woods (Pinus, Larix) and in 

 thickets, and evidently grows in more shady places than C. 

 suecica; in Japan it grows in the mountains. 



As to the structure of the shoot, this corresponds in 



the main to that of C. suecica; all the foliage leaves are 

 XXXVII. 10 



