134 
THE FLOWER GARDEN. 
white, 6in., summer; and D. pulchella, bright blue with a 
yellow eye, summer, 6in. There are three pretty varieties 
of the latter, viz., alba, white ; rubra, red ; and atropurpurea, 
purple. The foregoing are charming kinds for edging a bed 
or border, or for growing in masses on the margins thereof. 
Sow the seeds thinly in March or April where required to 
grow, and thin out the seedlings later on to 6in. apart. 
Draba (Whitlow Grass). — Dwarf compact-growing alpine 
plants, suitable for growing on old walls or on dry, sunny 
rockeries where they are not liable to be overgrown by taller 
plants. They belong to the Wallflower order (Cruciferae). 
The leaves grow in rosette form on the stems, and the plants 
have a charming effect when in flower. The chief species 
are : D. aizoides, flowers yellow, borne in March, height 2 to 
3in. ; native C. Europe and South Wales. D. gigas is a white- 
flowered species, and grows 3in. high ; D. grandiflora has 
white flowers borne in March, and grows 3m high; D. pyre- 
naica, grows 2 to 3m. high, and bears lilac-purple scented 
flowers in April and May. There are many others, but the 
above are the best. They will grow in ordinary soil, should be 
planted in spring, and may be easily increased by seeds sown 
where required to grow, in April ; or by division of the roots in 
October. 
Dracocephalum (Dragon’s Head). — Hardy perennials, 
belonging to the Sage order (Labiatae). D. austriacum bears 
blue flowers in whorled spikes in summer, grows 12 to i8in. 
high, and makes a pretty border plant. D. grandiflorum is a 
Siberian species, growing 6 to gin. high, and bearing blue 
flowers in oblong spikes in summer. An excellent plant for a 
sunny rockery. D. Ruyschiana comes from the Pyrenees, 
grows 1 to lift, high, and bears handsome spikes of purple- 
blue, fragrant flowers in summer. A variety of it, japonicum, 
bears violet-blue flowers, and is very pretty. A good border 
plant. D. speciosum is an Indian species, with lilac flow'ers, 
which requires to be grown on a sunny rockery. All do well 
in good, light, sandy loam or well-drained, ordinary soil. A 
sunny position is desirable. Plant in autumn or spring. In- 
creased by seeds sown in sandy soil in gentle heat, or in a 
cold frame in March ; also by cuttings of the young shoots 
in a cold frame in summer; and division of the roots in 
March. 
Dryas (Mountain Avens). — D. octopetala is a native 
evergreen alpine plant, which only grows an inch or so high, 
and bears white anemone-like flowers in summer. D. Drum- 
mondii is an American species of trailing habit, and bearing 
