Qt 
VOL. XIV. 
Collection of Arctic Plants. 363 
Siberia; the Altaic mountains, Dahuria, Unalaschka, Labra- 
dor. On the sea-shore of Arctic America ( Richardson) ; and 
upon adjacent islands not uncommon. 
CRUCIFERZ. 
3. Dikata: 
. D. alpina. 
There are three varieties of this plant which deserve notice, 
although differing principally in their size and degree of pu- 
bescence. 
1. major ; glabriuscula, foliis biuncialibus (siccitate reticulatis) 
marginibus hic illic evidentissime dentatis. 
A large and very beautiful state of D. alpina, with very few 
hairs on any part of the plant: its scape more than 3 inches 
high, and, as well as the pedicels, quite glabrous. Calya 
very slightly hairy. Corymbs almost an inch in diameter, 
of a deep bright yellow. 
2. intermedia ; pilosa, foliis pollicaribus (nec reticulatis) inte- 
gris vel rarissime obsoletissime dentatis. 
Marginal hairs of the leaves long and simple; those of the disc, 
as well as of the scape, much branched: hairs few on the 
calyx. Corymbs smaller than those of the first variety, and 
the flowers generally paler. 
3. nana ; valde pilosa, nana. 
Leaves scarcely half an inch high ; scape about an inch, and, 
as well as the calyx, very hairy. 
Inhabits the mountains of Lapland and Norway, and the 
arctic regions of America. West coast of East Greenland 
(Greville). i 
3 B With 
