March.'] GREEN-HOUSE— REPOTTING. 235 



April^ and be lifted in October. Keep them from frost. 

 Thus treated, they are very desirable. (Soil No. 12.) 



HelychrysumSj above forty species, chiefly belonging to the 

 green-house — all everlasting flowers. H. gvandiflbrum^ H. 

 arhoi^eum, H. fragrans, H. adoratlssimum, H. friiticanSj 

 and H. fulgidum^ are all very esteemed species, mostly with 

 soft downy foliage. The pots should be well drained, and 

 the plants kept in an airy situation, as they sufier from the 

 least damp. If the flowers are cut off" before they fade, they 

 will retain for many years all the splendor of their beauty; 

 but if allowed to decay on the plant, they will soon become 

 musty, and all their color fade. (Soil No. 6.) 



Hibhertias, about ten species. Three of them are known 

 to be fine climbing evergreen shrubs, namely, H. glossular- 

 isefolia ; H. dentcita ; H. volubilisj if closely approached, has 

 a disagreeable smell; H. fasciculdta, H. Saligna^ and K. 

 j)eduncidata^ are evergreen shrubs; they have pure yellow 

 flowers of five petals, blooming from May to September. 

 (Soil No. 12.) 



HbveaSj about eight species, pretty plants of New South 

 Wales, blue pea-flowering evergreen shrubs; the finest are 

 H. panosa^ H. atropurjpurea, H. linedrisj H. rosinaTinifdliaj 

 H. longifolia, and H, Oelsiij which is the most superb, and 

 flowers in abundance. They grow and flower freely ; the 

 pots should be drained. (Soil No. 6.) 



Hypericums ^ St. John's-wort, about twenty species. A few 

 of them are very showy, and with few exceptions have yel- 

 low flowers. H. monogynum^ H. halearicum, H. floribundum j 

 II. canoriensej H. segyptiacum and H. cochin-cMnense, which 

 has scarlet flowers, are among the best, and all of them flower 

 freely ; five petals, filaments many in three or five parcels. 

 They are all of very easy cultivation, and bloom generally 

 from April to September. (Soil No. 11.) 



Hydrangea hortensis is a well-known plant, and much 

 esteemed for its great profusion of very elegant, though mon- 

 strous flowers. They are naturally of a pink color, but 

 under certain circumstances of culture they become blue. If 

 grown in brown loam with a little sand, they will preserve 

 their original color ; but if grown in swamp earth with a 

 littfe mould of decayed leaves, they will become blue."^ 



* Mix the iron sparks from the blacksmith's shop with any kind 

 of soil, and they will be a beautiful bhie. One and a half quarts to 

 a bushel will do. 



