CATALOGUE OF GREENHOUSE PLANTS. 227 



are several species or varieties, some of which yield clusters 

 of yellow flowers, and others red ; from March to June. 



Gnidia. Flax-leaved Gnidia. A dwarf shrub, of which 

 there are several varieties, furnishing pretty tubular and 

 corymbose straw-coloured flowers in the Winter and Spring. 



Heliotropium. Peruvian Heliotrope. A species of soft 

 shrubby dwarf plants, which, when cultivated in a warm 

 situation, will yield abundance of delicate blue or purple 

 flowers ; from January to September. 



Helychrysum. Eternal Flower. There are several spe- 

 cies and varieties of this plant, producing soft downy 

 foliage and durable flowers, which, if cut before they are too 

 far advanced, will retain their splendour several years. 



Hibiscus Chinensis. This half-hardy herbaceous plant 

 is worthy of a place in the greenhouse, as some species 

 will yield flowers six inches in diameter, if well attended to 

 and frequently watered; the colours are crimson and blush. 



Hoya. Wax Plant. A fine climbing species, adapted to 

 the hot-house, the leaves being succulent, green and fleshy, 

 require considerable heat and but little water. Some pro- 

 duce pink flowers, and others white, in April and May. 



Hydrangea hortensis. The Hydrangea is a well known 

 deciduous half-hardy soft-wooded shrub, producing large 

 pink balls of blossom, when cultivated in a shaded border, 

 from May to October ; and by mixing iron dust from a 

 blacksmith's shop with the soil, or by growing the plants in 

 swamp earth, or mould from decayed leaves, the flowers 

 will become blue. 



Hypericum. St.John's-wort. A half hardy little plant, 

 producing yellow flowers from April to June. There are 

 several species, some producing scarlet blossoms. 



lllicium. Aniseed Tree. A dwarf species of shrub, the 

 leaves of which when rubbed, smell like anise; some pro- 

 duce red, and others yellow flowers, in March and April. 



Indigofera. Indigo Tree. A free-flowering shrub, of 

 which there are several species ; the flowers, which grow 

 in long panacles, are red, yellow and pink. 



Jasminum. Jasmine. Of this favourite genus, there are 

 several species of various complexions. The Catalonian Jas- 



