ERYTHRiEA 99 



Erys'imum (from Gr. eviio, 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 Wallfloiver, 18 ins. 

 in height. A perfectly hardy plant, with erect 

 racemes of mustard-yellow flowers. 

 E. ochroleu' cum helvetficum, The Alpine Wallflower, 

 forms little bushy plants about 9 ins. high, 

 with pale yellow flowers. A native of the 

 SavIss 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. 

 Erythr^'a — Centaury (from Gr. eruthraioSj red). Nat. 

 Ord. Gentianacece. 



A dwarf plant worth growing in the rock garden, 

 of biennial duration. 



