Draba cinerea, Adams

37. D. cinerea Adams , Mém. Soc. Nat. Moscou 5: 103 (1817)

(incl. D. arctica J. Vahl ).

Like 36 but densely stellately canescent in ail parts; silicula inflated. 2« = 48 (Ladogorskaja Ozera), 80 (Spitsbergen). Arctic Europe. Fe N o Rs (N) Sb. A variable arctic species. Plants from Spitsbergen are usually scapose, with siliculae 7-12 mm; those from the island of Mäkisalo in Ladogorskaja Ozera have slender leafy stems and very short siliculae (3-4 mm). The typical plant, with leafy stems and siliculae c. 6 mm, occurs in arctic Finland, Norway and Russia. Ekman identified some material from the Alps as this species; the distinction between it and 38 seems to be difficult. D. dovrensis Fries , Summa Veg. Scand. 32 (1846) from Norway (Dovrefjell), a robust plant with hairy siliculae, is sometimes placed here; its relationships are obscure.