272 



THE BOOK OF GARDENING. 



G. chilo'cnse (syn. G. coccineiwi) grows 2 ft. high, and bears 

 numerous bright scarlet flowers from May to September ; the variety 

 grandifloruni plenum has large semi-double flowers. Heldreichii 

 (ift.), orange-red, is a recent addition that should not be omitted. 



Gypsophila paniculata is a striking plant of gauze-like 

 appearance, and worthy of a place in the best herbaceous border. 

 It forms a dense mass, 2ft. high, and during July and the late 



summer is covered with myriads of 

 small whitish flowers, which are 

 invaluable for cutting purposes. 



Harpalium. — See Helianthus. 



Heleniums are valuable com- 

 posite plants for back positions 

 in mixed borders, or for planting 

 in shrubberies ; they have large 

 yellow flowers, which remain in 

 full beauty for a long time, and 

 are therefore much in demand 

 for cutting. Increased by seeds 

 or by division. H. autumnale 

 grows 3ft. high, and flowers 

 during July, August, and 

 September ; the golden- 

 yellow flowers, which are 

 3in. across, are produced in 

 abundance. The variety grandi- 

 fiorum is similar in habit to the 

 type, but has much larger flowers. 

 H. Bolanderi grows 2^ft. high, 

 and is a showy plant producing 

 rich yellow flowers with dark 

 brown disks. It flowers in July 

 and August. H. Hoopesii is a 

 grand border plant, 2ft. high, and 

 bearing clustered heads of bright 

 yellow flowers, each of which is 

 2in. across. 



Fig. 156. — Helianthus 



MULTiFLORus. Helianthus (Sunflowcr). This 



genus contains several showy 

 perennials suitable for the back of the herbaceous border or for 

 shrubberies, «&:c. Increased by seeds or by division. H. midti- 

 flonis (Fig. 156) is an old garden plant with large yellow flow^ers ; it 

 reaches a height of 4ft., and flowers from July to September. 

 The plant generally grown in gardens is the double or\e—Jiore- 

 pleno. H. rigidits, formerly known as Harpalium rigidum^ is a 

 well-known and attractive plant, growing from 3ft. to 4ft. high, 



