Arabis Alpina (_Rock Cress, or Snow in Summer_)
 

Arabis Alpina (_Rock Cress, or Snow in Summer_).--Pure white hardy
perennial, which is valuable for spring bedding. Not particular to
soil, and easily raised from seed sown from March to June, placed
under a frame, and transplanted in the autumn, or it may be propagated
by slips, but more surely by rootlets taken after the plants have done
flowering. Plant 3 in. apart. Height, 6 in.