288 



placed the plant in question in the genus Parry a, but there 

 also the plant cannot have the correct position, because the 

 plants of this genus have a leafless stem , broad generally 

 winged seeds, and sinuate pods; also these plants generally 

 bear a considerable number of glands. But Sir J. Hooker 

 remarks that the cotyledons are slightly oblique. Turc- 

 zaninoff suspected (according to J.Hooker: Outlines p. 315) 

 that Eutrema arenicola might be his E. piliferum. Lede- 

 bour 1 ) has put this plant (E. piliferum) , which he calls 

 Parrya microcarpa, together with P. Ermannt, into a section 

 Haplostigma of Parrya. Traut vet ter 2 ) and Kjell m an 3 ) 

 have shown us, that P. Ermanni is to be placed in the 

 genus Ar a bis; surely also P. microcarpa is an Arabis , but 

 by no means Eutrema arenicola. In the Synoptical Flora of 

 North-America by Asa Gray (vol. I, part. I, p. 137, 1895) the 

 plant is taken up again by B. L. Robinson as Eutrema areni- 

 cola and to the localities given by Richardson is added: 

 Gloverin Bay, Alaska (Muir) and Grinnell Land(?) (Greely). 



In the year 1840 the late Mr. J. Vahl, the meritorious 

 explorer of the flora of Greenland, described and figured a 

 plant found by himself in West Greenland at 61° and 69° 

 latitude in the Flora Danica tab. 2297 as Sisymbrium humi- 

 fusum. Later on S. Watson 4 ) has shown us that this 

 plant is to be placed in the genus Arabis, Sectio Pseudarabis 

 Wats., which name he afterwards 5 ) changed to Sisymbrina 

 Wats. He describes this section: Seeds oblong or elliptical, 

 very small, wingless; cotyledons often more or less oblique. 



Working at Arctic plants in the Botanical Museum of 

 the University of Copenhagen, I wished to put the Eutrema 



*) Ledebour: Flora Rossica I, p. 132. 



2 ) Trautvetter: Flora Terræ Tschuktschorum, Acta horti Petro- 

 politani VI, p. 10. 



3 ) Kjellman: Asiatiska Beringsunds-kustens fanerogamflora i Vega- 

 Expeditionens vetenskapliga Iakttagelser I, pag. 537. 



4 ) Proceed, of the American Academy XXIII, p. 124. 



5 ) in Asa Gray: Synoptical Flora of North America, Vol.1, part. I, 

 p. 159. 



