6 ARKIV FÖR BOTANIK. BAND 12. N:0 7. 



Draha gelida TuRCZ., of which T have seen specimens at Kew, 

 presented by Turczaninow himself and with his description 

 of this plant in Flora Baicalense-Dahurica in Bulletin des 

 Naturalistes de Moscou t. XV (1842) (p. 249—250?). 



But how^ are we to explain the origin of this Draba? 



As we know D. C. Solander made an exploratory tour 

 in the year 1756 in the Swedish Lapp-territory of Pite and 

 its adjacent parts of Norway. During this journey D. hirta 

 was discovered according to a note in Fauna Svecica ed. 2 

 (1761) appendix p. 557. As we also know, Bray a alpina 

 Sternb. et Hoppe, occurs in the Norvegian Nordlanden. 

 There are some specimens in the Museum of Stockholm, 

 collected from Junkerdalen, which in habit also quite agreee 

 with the Linnean Braya to the right on the sheet. It is 

 possible that it was via Junkerdalen that Solander, starting 

 from the Lapp-territory of Pite, entered Norway, when he 

 visited Pörstad on South Folden-Fjord. Perhaps it was 

 SoLANDER that gave Linn^us this Braya alpina, collected in 

 Junkerdalen, whereas Ltnn^us received the true D. hirta 

 from Gmelin, and, considering the two plants to be identical, 

 had mounted them on the same sheet but had founded his 

 description of the species only upon tho Draöa-specimen. For 

 both the diagnosis of Linn^US himself 1. 1. c. c. and that 

 which he has quoted from Gmelin can only be referred to 

 the true D. hirta. 



Another alternative might be that Solander really gath- 

 ered D. hirta in Scandinavia f. i. near Folden-Fjord as an 

 ephemeral immigrant from the shores of the Arctic Ocean 

 where forms affined to it occur. 



Or, is the plant to be rediscovered somewhere in the 

 Swedish Lappony e. g. near the Lake of Virijauhre, where 

 it is possible Solander passed on his way back from Norway ? 

 Draba hirta seems to have been collected later in the year 

 — in August or September — than Braya alpina, which 

 probably was gathered in June or July. 



3. Draba rupestris R. Br. 



The name of D. rupestris was first given by Robert 

 Brown (1. c.) to a plant which in 1789 was discovered by 



