411 



There are varieties with white flowers, purple flowers, with blue 

 flowers, and with red flowers. 



The second species has the roots composed of many thick fleshy 

 knots or tubers, which are joined by fleshy fibres: the stalks rise a 

 foot and half high, and incline on one side: the leaves on the lower 

 part are six inches -long, and two inches and a half broad in the 

 middle, ending in acute points, and not so rough and hairy as the 

 first; they are alternate and sessile: the two upper leaves on every 

 branch stand opposite, and just above them are loose bunches of 

 pale yellow flowers, the corolla of which is stretched out further 

 beyond the calyx than in the common sort. It is a native of Ger- 

 many, &c. and flowers from May to October. 



The third has a perennial root: the stalks two feet high: the 

 leaves rounder, and armed with rough prickly hairs: the flowers in 

 bunches like the first sort, but blue: they appear in March, but 

 seldom produce seeds in this climate. Found near Constantinople. 



Culture. These plants may be increased by seeds or parting the 

 roots, but the latter is more practised. The seed should be sown in 

 the spring, in a border of common earth; in the autumn the plants 

 will be proper to set out where they are to remain, or to remove into 

 other pots. The roots should be parted in the autumn, and planted 

 out either in beds about a foot from plant to plant, or where they 

 are to remain; almost every part will grow, and the planls are 

 hardy, and succeed in any soil or situation : they only require to be 

 kept clean afterwards. They produce variety in mixture in the 

 borders. 



