Cornaceæ. 131 



Cornus suecica L. 



Norman, 1901, p. 322. Warming, 1887, p. 18, 34, 40, 

 75, 138. Rosenvinge, 1896, p. 67, 128, 161, 197, 198. Hartz, 

 1894, p. 57. Buchenau, 1859, p. 87. Sylvén, 1906, p. 135. 

 Silén, 1905, p. 87. Willis & Burkill, 1903, p. 343. Ser- 

 NANDER, 1901, p. 141, 142, 164. Sertorius, 1893, p. 622. 

 Knuth, 1898, vol. 2, part 1, p. 51). 



Cornus suecica is mostly found in the subarctic regions, 

 and most frequently in the northern part of the Scandi- 

 navian peninsula, but is fairly common everywhere in Fin- 

 land, Sweden, Norway and in the northern parts of Den- 

 mark. Elsewhere in Europe it is found near Reval, in Hol- 

 stein and Pomerania, and the Alps, also in the Færoes and 

 Iceland. Outside Europe it grows in West Greenland, in 

 Labrador, New Foundland, Alaska and Baffmsland. 



In Greenland it appears most frequently in "Urtelierne" 

 and in thickets ; Hartz says it is nearly always found in 

 birch thickets and Rosenvinge, that it is also present in 

 the willow thickets and on the heaths in the southern part. 

 Its northern boundary in Greenland is according to Rosen- 

 vinge, at 69°14. 



According to Norman it occurs in Finmarken in the 

 birch woods, where it often by itself forms the undergrowth, 

 growing closely like corn in a field. 



The development of the shoots of Cornus suecica has 

 been described by Buchenau (1859), and my own obser- 

 vations quite agree with his description. The rhizome is 

 horizontal and bears opposite triangular scale-leaves, two to 

 three centimeters apart. It is of several years duration, 

 while the scale-leaves die already the first year; and 

 from their base adventitious roots appear, with a rich rami- 

 fication. In the axis of the scale-leaves buds develop, some 

 becoming runners, resembling in all particulars the mother- 



9* 



