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DEABA DR ACOCEPHALUM. 



stems and flower-stalks very smooth. 

 Croatia and Carniola. The rock- 

 garden, among the dwarfest plants, in 

 tufts or small sheets near the level of 

 the eye, in light, moist soil. Seed and 

 division. 



Draba cinerea (Grey D. ) The most 

 effective, perhaps, of the white - 

 flowered species ; 3 to 6 in. high. 

 Flowers, in early spring; white, in 

 terminal racemes, on simple, leafy, 

 somewhat pubescent stems. Leaves, 

 oblong- linear, entire; stem-leaves 5 or 



6 in number, scattered. Siberia. 



Rockwork in well-drained sandy loam. 

 Seed or division. 



Draba cuspidata (Pointed-leaved 

 D.) A pretty dwarf species, 3 in. 

 high, with a thick woody stem, and 

 closely resembling Z>. ciliaris. Flowers, 

 in spring ; yellow, in terminal racemes ; 

 scapes naked, villous. Leaves, linear, 

 acutish, keeled, ciliated, in dense 

 rosettes. Mountains in Tauria and 



Spain. Rockwork, old walls and 



ruins, and front margin of mixed 

 border, in warm sandy loam. Seed, 

 which is sparingly produced. 



Draba glacialis (Glacier D.) A 

 very minute kind, forming dense little 

 cushions, 1 to 2 inches high. Flowers, 

 in earliest springy yellow. Leaves, 

 linear, pointed, smooth, stiff, fringed 

 on the edges with rigid hairs. Very 

 much resembling a small specimen 

 of D. aizoides, and considered by 

 Koch to be merely a variety of that 

 species growing at a higher elevation. 

 It differs from it by having a 

 few-flowered stem, pedicels shorter 

 than the pod, and a short style. 



Granitic Alps of Switzerland. 



The rock-garden in exposed spots, in 

 moist and very gritty or sandy soil, 

 and associated with the dwarfest 

 alpine plants. Seed or very careful 

 division. 



Diaba rupestris (Rock D), A dwarf, 

 compact-growing species, 2 to 3 in. 



high. Flowers, in summer; white, 

 few, small, on almost leafless stems. 

 Leaves, crowded, lance-shaped, almost 

 entire, pilose. Norway, Scotland, and 



North America. Rockwork, in 



sandy loam. Seed. 



Draba tridentata (Three-toothed' 

 leaved D.) Easily distinguished by 

 its 3 -toothed leaves ; 2 to 4 in. high. 

 Flowers, in spring ; golden yellow, in 

 terminal racemes ; scapes naked, 

 smooth. Leaves, dark green, obovate, 

 narrowed at the base into the stalk, 

 hairy. Mountains of Southern Russia. 



The rock-garden, in light moist 



soil. Seed and division. 



Dracocephalum argunense (Argunsk 

 D.] A handsome perennial allied to 

 D. Ruyschianum, but with larger 

 flowers, and smooth calyces ; 1 to 

 14 ft. high. Flowers, in summer ; blue, 

 in whorled spikes; calyx quite 

 smooth ; upper lip semi-trifid, lower 

 one narrowly bipartite. Leaves, linear- 

 lanceolate, entire, smooth, nearly 

 sessile, 2 or 3 in. long; floral ones 

 wedge-shaped-elliptic, acute ; stems 



smooth. Dahuria. A fine border 



plant, especially in warm soils. In 

 cold ones it would be better on raised 

 borders, or on the rockwork. Seed 

 or division. 



Dracocephalum austriacum^ ustrian 

 D.) Another fine kind, with the 

 habit of D. Ruyschianum, but with 

 divided leaves; about 1 ft. high. 

 Flowers, in summer ; blue, in whorled 

 spikes, each bloom being more than 

 4 in. long; upper teeth of calyx ovate, 

 lower ones lance-shaped ; corolla about 

 3 times as long as the calyx. Leaves, 3- 

 or 5-parted ; segments linear; margins 

 revolute ; floral ones trifid, and with 

 long fine spines ; stems rather pilose. 

 Most of the great mountain chains of 



Europe. Positions and treatment 



the same as for the preceding. 



Dracocephalum grandiflorum (Be- 

 tony -leaved D.) A very dwarf and 



