214 ROCK GARDENING FOR AMATEURS 



there is plenty of moisture. Slugs are very fond of this 

 plant. It may be increased by seed sown in the spring. 

 C. argenteum is a sub-shrubby plant from Armenia, with 

 silveryTgrey leaves, growing about one foot high. It 

 must have a well-drained position in full sun. C. cau- 

 casicum is a spreading plant, with finely cut leaves, 

 and white flowers, useful for clothing a half-shady, moist 

 bank. A taller plant is C. cinerariaefolium from Dalmatia, 

 with branched stems, silvery leaves, and large white flowers. 

 For the larger rockery where there is plenty of room, the 

 perennial C. lacustre may be used with advantage. It 

 does not grow too high, and produces its large white 

 flowers very freely, and these come in useful for cutting. 

 A dwarf growing plant is C. Zawadskii, from Eastern 

 Europe, with distinct, cut foliage, and white flowers 

 that are suffused with purple. All the Chyrsanthemums 

 are readily grown in well-drained but moist, loamy soil. 

 They may be either increased by division in the autumn, 

 or spring, like the ordinary border kinds, or raised from 

 seed, which most of them produce freely. 



Chrysogonum yirginianum, the only sort in cultiva- 

 tion, is a very leafy plant, some nine to twelve inches 

 high, that bears golden-yellow flowers in May, and 

 throughout the summer. It is native of the United States, 

 and belongs to the Daisy family (Compositae). In full 

 bloom it is showy, but when the burst of blossom is 

 past it loses much of its attractiveness. It thrives well 

 in loamy soil in half shade. An increased number of plants 

 is readily obtained by division in late summer or spring. 



