12 ARKIV FÖR BOTANIK. BAND 12. XIO 7. 



nizensis and its affined species, in Arctic or Northern lo- 

 calities: Draha rupestris and D. alpina, in Central Europe : i). 

 carinthiaca. 



6. Draba nivalis Liljebl. 



With the exception of D. crassifolia Graham, D. flad- 

 nizensis is the most glabrous of all Northern species. The 

 one with the thickest covering is D. iiivalis. Both are »ho- 

 motrichous», the one with simple hairs, the other with the 

 most stellulate ones. Owing to their different pubescence 

 the two species seem to be morphologically the least affined 

 ones. The fruit in the hybrid between them {Draba nivalis 

 ß brachycarpa Lindbl., in Bot. Not. 1839 p. 19, Draba brachy- 

 carpa Zetterst. in Bot. Not. 1854 p. 151, non Nuttal, Draba 

 curtisiliqua Zetterst. in Plantes vasculaires des Pyrenees 

 principales 1857 p. XLVIII) is also almost sterile, which is 

 not always the case between hybrids of this genus, even 

 when the pollen is not very good. 



Draba nivalis is first mentioned in Vetenskapsakademiens 

 handlingar 1793 p. 208 as found in the Lapp-territory of 

 Torne 1788. The plant was introduced in »Utkast till en 

 Svensk Flora» ed. 2 1798 p. 269, by S. Liljeblad and is illu- 

 strated in the same work fig. 35. The following year it was 

 more completely described (in Nova Acta Societatis Scienti- 

 arum Upsaliensis b. 6 p. 47 1799) with a good illustration 

 tab. 2 f. 2. By Wallmax, who published a 3:d edition of the 

 Flora of Liljeblad (1816), it was called Draba Liljebladii 

 Wallm. (p. 350). By Wahlenberg in Flora Lapponica 1 ed. 

 1812 p. 174 it had been called Draba muricella Wg. It 

 was not till 1839 that it was once more given its first name 

 by Lindblom (Linnaea 1839 p. 326) and after him also by 

 Hartman in the 5th ed. of Skand. Flora 1849 p. 112. 



Under the name of D. nivalis Willdenow has combined 

 (in Species plantarum ed. IV Willdenow p. 427) both the 

 true Z). nivalis Liljebl. and a plant which was discoverd 

 by D. Villars on Mount Cenis and described by him under 

 the name of: >>D. hirta C» in Histoire des plantes du Dau- 

 phiné t. 3 (1789) p. 283. After Willdenow J. P. De Candolle 

 adopts the name of D. nivalis and describes the plant from 



