ON GREENHOUSE PLANTS. 



729 



and not to be grown as 

 greenhouse - plants). The 

 flowers are borne in sum- 

 mer. Sorts : C. Auran- 

 tium (Sweet Orange) (Fig. 

 474), C. Bigaradia (Seville 

 Orange), C. decumana 

 (Shaddock), C Limonum 

 (Lemon), C.Limetta (Lime), 

 and C. medica (Citron) 

 (Fig- 475)- 



Clethra arborea is 

 known as the Lily of the 

 Valley Tree, having white 

 flowers somewhat resem- 

 bling those of that plant. 

 Propagate by cuttings of 

 the young wood in April or 

 May, and grow cool. It 

 makes a fine specimen 

 plant, and flowers in August 

 and September. 



Coleonema pulchrum is 

 shrub, bearing red flowers 



a pretty 



in May. 



Propagate from, cuttings of the young 



shoots in June and 



;.f, 

 I 



w 



Fig. 475. — Citrus medica. 



;>s. ..AD 



Grow in peat, 



and sand, in 



the cool pit. The 



shrub attains a 



height of 



between 



4ft. and 5ft. 



Coronilla glauca is a small- 

 growing plant, having yellow fra- 

 grant flowers. Propagate by cuttings 

 (which root freely) in early sum- 

 mer, in the cool pit, growing in 

 the same house, and placing out- 

 L side towards the end of summer. 

 Soil : loam, leaf-soil, and sand. 

 Flowers in June and July. There 

 is also a yellow variegated form. 



Correas are useful for summer 

 (June) flowering. Propagate by 

 cuttings in bottom-heat in April 

 Fig. 476.— Correa cardinalis. and May. Some sorts do not 



