ERYTHR^EA 99 



ERYS'IMUM (from Gr. eruo, to draw, in allusion to its 

 supposed property of raising blisters). Nat. Ord. 

 Cruciferce. 



The Wallflower-like Erysimums are extremely 

 free and continuous-flowering biennials, not nearly 

 as often grown as they deserve to be, and if pro- 

 fusely massed together they make a show of bright 

 colour in the spring and early summer, surpassed 

 by few other flowers at that time of year. 

 E. Arkansa'num, The Western Wallflower, 18 ins. 

 in height. A perfectly hardy plant, with erect 

 racemes of mustard-yellow flowers. 

 E. ochroleu'cum helvet'icum, The Alpine Wallflower, 

 forms little bushy plants about 9 ins. high, 

 with pale yellow flowers. A native of the 

 Swiss Alps and the Pyrenees. Syn., Cheir- 

 an'thus alpi'nus. 



E. Perowskia'num, 18 ins. high, is distinctly the 



finest of this class. The flowers open and 



continue blooming for many months, are of 



the brightest orange colour, and smell sweetly. 



Pick off the long seed-pods as they form. A 



native of Afghanistan, 1838. 



Sow the seed outdoors in June for spring 



flowering, and afterwards treat the seedlings as for 



Wallflowers. Or sow in March and April for 



summer and autumn flowering. 



ERYTHEMA Centaury (from Gr. eruthraios, red). Nat. 

 Ord. Gentianacece. 



A dwarf plant worth growing in the rock garden, 

 of biennial duration. 



