THE GREEN-HOUSE CATALOGUE. 245 



CTsTus Idxiis, waved-leaved Rock-rose, a low frame- 

 shrub, introduced from Spain in 1656, and flowering in 

 June and July. 



C. hirsiitiis, hairy Rock-rose, a low frame-shrub, intro- 

 duced from Portugal in 165G, and flowering in June and 

 July. 



C. salvifdliiis, sage-leaved Rock-rose, a low frame-shrub, 

 introduced from the South of Europe in 1548, and flower- 

 ing in June and July. 



C. heferoj)hy^llus, various-leaved Rock-rose, a low frame- 

 shrub, a native of Algiers, and flowering in June and July. 



C. incanus, hoary-leaved Rock-rose, B. M. 43, a frame- 

 shrub, introduced from the South of Europe in 1596, and 

 flowerino; from June to Auoust. 



C. creticus, Cretan Rock-rose, a low frame-shrub, long 

 since introduced, and flowering in May and June. 



C. dlbidus, white-leaved Rock -rose, a low frame-shrub, 

 a native of Spain, introduced in 1640, and flowering in 

 June and July. 



C. crispus, curled-leaved Cistus^ a low frame-shrub, in- 

 troduced from Portugal in 1656, and flowering in June and, 

 July. 



Most of these are beautiful shrubs with showy, transient, 

 delicate flowers. Some keep them in the open air, and 

 cover them with mats or straw during winter ; but to have 

 them flower freely they must have the protection of glass, 

 and unless they flower freely, of what use is keeping them 

 just within the verge of existence ? 



Helia^nthemum formosum, beautiful Sun-rose, B. M. 

 264, a low frame-shrub, a native of Portugal, introduced in 

 1786, and flowering in May and June. 



H. atriplicifdlium, grache-leaved Sun-rose, a low frame- 

 shrub, a native of Spain, introduced in 1656, and flowering 

 in June and July. 



