[Vol. 2 



102 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Ilydrocotyle vulgaris grows here and there from Larvik to 

 Bergen. In Sweden it does not extend farther than to Dais- 

 land, but it is exceedingly common in Jutland. 1 



Hypericum pulchrum grows in the region extending from 

 Larvik through the west of Norway to the Trondhjem Fjord. 

 In Sweden it is found from Hall and to Bohuslan, but it is 

 more natural to suppose that it immigrated from Denmark or 

 England, where it is common. 



Luzula sylvatica grows along the coast from Arendal to 

 Lofoten. It is found wild only in the south of Sweden, but is 

 common in Jutland. 



Rubus Radula is found from Kragero to Mandal. In 

 Sweden it is found from Skaane to Bohuslan, but is very com- 

 mon in Jutland. 



Sarothamnus scoparius grows between Grimstad and 

 Mandal. In Sweden it is wild only in the east. It is very 

 common in Denmark. 



Scirpus multicaulis grows at Arendal and in Jaederen. It 

 is found in Sweden from Skaane to Vestergothland. It is com- 

 mon in Denmark. 



Scirpus setaceus is found to the west of the Kristiania 

 Fjord and more recently has been found also along the coast 

 almost as far as Bergen. It is found in Sweden from Skaane 

 to Bohuslan, but it can scarcely be supposed to have migrated 

 thence to its most easterly occurrence in Norway, as the center 

 of its distribution in Sweden lies farther south, and in Norway 

 farther west. It seems, therefore, more probable that it has 

 been brought to Norway directly from Denmark. 



1 Since writing the above, I have discovered Ilydrocotyle vulgaris in a locality 

 on Kirkeoen (Hvaler) in southeastern Norway. The locality lies about midway 

 between the easternmost of the previously known Norwegian stations and the 

 Swedish localities and might be looked upon as proof that the species in question 

 had immigrated step by step through Sweden and not directly from Denmark. 

 This, however, is not the case. On an excursion in 1907, I visited the exact spot 

 where I later found Hydrocotyle vulgaris and I can maintain with certainty that 

 Ilydrocotyle was not growing there at that time. The plant has, therefore, been 

 introduced into the locality in question since that date. My opinion, therefore, 

 that Hydrocotyle has immigrated by leaps and bounds directly from Denmark 

 into Norway, is only strengthened by this discovery. 



