EKMAN, NOMENCLATURE OF SOME NORTH-EUROPEAN DRAB.^. 11 



D. jladnizensis . If this be right the name of the form 

 should be: D. jladnizensis Wulf. f. lactea Adams. 



Besides D. lapponica Wg. there are often found in the 

 Scandinavian collections forms of D. rupestris under the name 

 of I), jladnizensis. These are specimens with serrated leaves 

 or pubescence on the stem, a stouter stem and larger, even 

 when dried, pure white flowers. The true D. jladnizensis 

 has always very small flowers; the petals about two mm. 

 A form of D. rupestris or an intermediate one with a few 

 hairs on the stem has wrongly been called D. jladnizensis 

 /. altaica. Draha altaica Bunge is a form of D. rupestris 

 distinguished by its pods which at least in immaturate state 

 are gathered in a capitate corymb. This species was also 

 referred to D, rupestris in Flora Altaica tom. Ill p. 72. The 

 illustration of it in Icones Plant. Flor. Ross. tab. 260 agrees 

 completely with specimens, communicated by Bunge him- 

 self, which I have seen in the Nat. Hist. Mus. in London. — 

 From localities in Central Europe there are often found in- 

 termediate forms, probably hybrids, between D. jladnizensis 

 SindDraba carinthiaca Hoppe. Bot. Zeit. 6 (1823) p. 437. They 

 are distinguished by some stellulate hairs on the surface or 

 in the margins of the leaves, sometimes also on the stem, 

 higher growth and longer pedicels. The style is always al- 

 most insensible, as with both the parents, especially D. ca- 

 rinthiaca. I point this out by way of contrast to what is often 

 the case in intermediate forms in the North, where D. alpina 

 probably is the one parent. 



In the Flora Italiana by Parlatore and Caruel vol. 9 

 p. 770 D. carinthiaca is given as a synonym to D. jlad- 

 nizensis ! 



The reason w^hy this species has been so confused with 

 other affined forms is perhaps in a certain degree to be ascrib- 

 ed to the actual wording of the diagnosis. When v. 

 Wulfen says that the stems are »7iudi>>, this word to be 

 rightly understood must be amplified with another attribute 

 he gives it, viz. 2 or 3 leaves. As has been shown, these 2 

 or 3 leaves are not always found in nature, and therefore 

 some authors has omitted this character, whereby the word 

 »nudi» has obtained another signification and the diagnosis 

 has become misleading. Another reason is probably the 

 mere existence of manv intermediate forms between D. jlad- 



