EKMAN, NOMENCLATURE OF SOME NORTH-EUROPEAN DRAB^. 13 



Central Europa (Flore Fran^aise ed. 3 (1815) t. IV p. 699), 

 which plant, as far as I can judge, must be D. carinthiaca 

 Hoppe or a form very closely allied to it. 



7. Draba crassifolia Graham. 



This species established by Graham (in Edinburgh Xew 

 Philosophical Journal 7 1829 p. 182) is said to have been 

 found for the first time in Norway in 1837 by L. L. IjJE- 

 stadius on Mount Tsatsa near Lyngen-Fjord (Hartman I, c. 

 ed. lip. 208). Further it has been collected by J. M. Norman 

 on the Flöifjeld near Tromsö (J. M. Norman: »Index Supp- 

 lementarius» in Det Norske Videnskabers Selskabs Skrifter, 

 5 bind., 1 heft. 1865 p. 5). In Sweden the plant has never 

 been gathered. 



Both Graham and J. W. Hooker (1. c. p. 54) distin- 

 guished two forms of it, viz. one with yellow and another 

 with white flowers. With yellow^ flowers, of the same colour 

 as D. alj)ina, it is represented in Flora Danica tab. 2419. 

 The Norwegian individuals I have seen in collections had 

 creamy white or pale sulphurous-coloured flowers, as in 

 dried specimens of D. jladnizensis or D. magellanica. (Ac- 

 cording to Blytt 1. c. p. 981 they are also of a pale yellow 

 when in a fresh state.) The character derived from the less 

 prominent midrib on the under side of the leaves will not 

 always serve as a criterium in distinguishing the two species 

 from each other, as this prominent midrib is also missing in 

 specimens of D. fladnizensis f. i. from localities where the 

 snow is just melting. A character which, as far as I have 

 seen, is alway constant in D. crassifolia is the longer, oblong 

 pods. On the illustration in Flora Danica 1. c. there are 

 some granulate ridges in the seed. These are, however, miss- 

 ing in the seeds of an individual with white flow^ers (ga- 

 thered by Mr A. Landmark on the Flöjfjeld) which is in the 

 Museum at Stockholm. The seeds of this specimen are quite 

 smooth like those of D. fladnizensis. If the form with white 

 flowers also belongs to this species, D. crassifolia would 

 constitute a link between the Sections Leucodrahce and Chryso- 

 drabce. 



