Hardy Exotic Plants for Naturalization. 57 



ceding, but warmer and always in light, sandy soil, or 

 thoroughly well drained sandy loam. 



Purple Candy Tuft. Beris umbellata. Southern 

 Europe. Annual ; i foot ; purple ; summer ; seed. — 

 Bare open spots in woods or on slopes, in any soil. 



Common Bocket. Hesperis matronalis. Europe. 

 Biennial ; i to 3 feet ; various ; summer ; seed. — In 

 shrubberies ; the single variety will sow itself very 

 freely. The double ones would probably " die out." 



Virginian Stock. Malcolmia maritima. Southern 

 Europe. Annual ; 6 to 12 inches ; lilac purple ; summer ; 

 seed. — Pretty in any spots where it would not be overrun 

 by grass, etc. 



Peroffski's Erysimum. Erysimum Peroffskianum. 

 Palestine. Annual ; i to 2 feet ; deep orange ; summer ; 

 seed. — Rather bare spaces in copses, and on banks, in 

 ordinary soil, " sows itself." 



Coris-leaved .ffiJthlonema. ^thionema coridifolium. 

 Southern Europe. Evergreen perennial ; 6 inches ; lilac 

 rose ; summer ; seed or division. — Exposed rocks amidst 

 dwarf vegetation, or on bare banks. 



Heart-leaved Seakale. Crambe cordifolia. Caucasus. 

 Tuber ; 4 to 6 feet ; white ; summer ; seed or division. — 

 Grassy spaces beside wood and pleasure-ground walks. 

 Isolated plants in rich ground are most effective. 



Arabia -like Heliophila, Hdiophila araboides. 

 South Africa. Annual ; 6 to 9 inches ; blue ; summer ; 

 seed. — Sunny banks and rocky ground, with sparse low 

 vegetation, in sandy soil. 



