Directions for Specific Culture. 47 
proportion of sand, in order to absorb moisture more 
freely. 
Douglasia Vitaliana (Pyrenees). 
Treat like Androsace carnea. 
Draba dediana (Spain). 
Treat like Draba Mawii, which it resembles : it 
is, however, a better grower than that species. 
Draba Mawii (Spain). 
The most difficult species of Draba to grow and 
flower. Plant tightly between chinks of rock on the 
south side of the rockery where it will get full sun, 
as it requires to be dry during winter: a little lime- 
stone added to the soil is very beneficial. 
Draba pyrenaica (Mts. of S. Europe). 
This is purely a rock plant, and likes similar 
treatment to Draba Mawii, but requires gritstone 
in the place of limestone. Once or twice a year it 
should be top-dressed with fine grit worked well 
amongst the foliage. In autumn this top-dressing is 
especially useful and important, as a safeguard 
against that wintry damp by which the plant is so 
liable to be injured. Before application, all dust 
must be taken out of the grit, lest any moisture 
should be encouraged by it to stand among the 
foliage of the plant. With sucha top-dressing the 
plant may be maintained in a satisfactory condition 
throughout the resting season. 
Draba; Remaining kinds. 
All the other species of this genus thrive on any 
well-drained part of the rockery, or on a sandy bank. 
