DRAGON'S-HEAD. 135 



water than the others. It may be increased by parting 

 the roots in autumn. 



The Austrian species is very handsome: the flowers 

 are violet-coloured. The Hyssop-leaved, a native of Nor- 

 way, Siberia, &c. has blue flowers, blowing in June. 



The Siberian kind has pale blue flowers. The three 

 last-mentioned species should be sown towards the end 

 of March : when about two inches high, they should be 

 removed from where they were first sown into separate 

 pots, about eight inches wide : this should be done care- 

 fully, without removing the ball of earth attached to them, 

 and they should be placed in the shade until they have 

 taken new root. They will last three or four years, some- 

 times longer; but will not flower well after that age. 

 They should all be kept tolerably moist, particularly when 

 newly planted. The Balm of Gilead is the only kind that 

 requires shelter in the winter. 



DEYAS. 



ROSACEJE. ICOSANDRIA POLYGYNIA. 



So called by Linnaeus from the Dryades, or nymphs of the oaks : 

 the leaves bearing some resemblance to those of the oak. 



THE Five-petaled Dryas is a native of Siberia: it is 

 a very small plant, bearing yellow flowers. The Eight- 

 petaled species is a delicate little evergreen, with snow- 

 white blossoms, and extremely pretty: it is a native of 

 Lapland, Denmark, Siberia, Ireland, Scotland, England, 

 Italy, &c. Thus, like Homer, it may boast that at least 

 seven different places claim the honour of its birth. It is 

 a perennial plant, and will not suffer from cold. The 

 earth should be kept moderately moist. It flowers in June. 



