Draba Draba, Clairv.

34. D. tomentosa Clairv. , Man. Herb. 217 (1811).

Like 32 but with dense indumentum of stellate hairs extending to the pedicels, and distinctly hairy silicula, which is often slightly inflated when ripe. • Mountains o f C. & S. Europe from Pyrenees to Carpathians and Balkan peninsula. Au Bu Cz Ga Ge He Hs It Ju Po. The typical plant occurs in the Alps, Carpathians and Rodopi Planina . Its occurrence in the Pyrenees seems doubtful. The plant from the E. Pyrenees has been distinguished as D. subnivalis Br. -Bl., Commun. Stat. Int. Géobot. Médit. Alp. 87: 226 (1945). It is said to differ from D. tomentosa in its slender habit, narrower leaves, lanceolate (not ovate) silicula, and somewhat longer style. D. korabensis Kümmerte & Degen ex Jâv. , Bot. Közl. 19: 22(1921), from mountains in the N. Balkan peninsula, seems very similar to 34 but differs mainly in the number of cauline leaves (up to 5) and in the somewhat twisted silicula. It is considered by some authors to be related to 38. Species 31 to 34 constitute a critical complex which obviously needs experimental study. Numerous varieties of these species and ‘hybrids’ inter se and with other species of this section are recorded.