176 Encyclopaedia of Gardening 



weeks ; before frost touches them a few ma y be cut for house decora- 

 tion. The Pampas Grass makes a splendid bed on the outskirts 

 of a lawn if the position is sheltered, and the soil well drained. It 

 is a hardy perennial, and may be planted in autumn or spring. 

 Propagation is by seed, sown under glass in spring. 



Gypsophila (gypsoph-ila, from gypsos, chalk, and phileo, to love a 

 chalk lover. Ord. Caryophylleae) . Graceful plants, one species of 

 which, paniculata, is a hardy perennial that spreads into a broad bush 

 and bears numerous sprays of lace-like bloom ; it is good for mixing 

 with cut flowers. It may be propagated by division, or raised from 

 seed in spring, and thrives in most soils. There is a double variety. 

 G. elegans is good as an annual (for culture, see Annuals) . G. repens 

 is a creeping white-flowered perennial, suitable for the rockery. 



Gypsum (Sulphate of lime). A useful fertiliser, valuable for fixing 

 ammonia. For this reason it may be used with advantage over a 

 manure heap, spread in a thin coat. 



Habenaria (habena-ria, from habena, a rein, in allusion to the 

 spur. Ord. Orchidaceae). A genus of Orchids, the most popular 

 species of which are hardy, and thrive in sandy peat in the rock 

 garden. Among these may be mentioned bifolia, the Butterfly 

 Orchis, which grows about a foot high and produces white flowers 

 in early summer; and fimbriata, lilac. Propagation is by division, 

 the pieces being potted and started in a frame. 



Haberlea (haber-lea, after Professor Haberle. Ord. Gesneraceae) . 

 Herbaceous perennials, the most popular of which is rhodopensis, 

 a plant esteemed for the rockery, where it thrives in peaty soil if 

 given a little protection in winter. It may be propagated by seeds 

 or division in spring. It bears its lilac flowers in spring on stems a 

 few inches high. See the Botanical Magazine, t. 6651. 



Habrothamnus. See Cestrum. 



Haemanthus (haeman-thus, from haima, blood, and anthos, flower, 

 referring to the colour. Ord. Amaryllideae). Warm-house bulbs, 

 thriving in sandy loam with a third of peat, propagated by offsets, 

 and easily managed if given plenty of water in summer and kept 

 dry in winter. A little of the top soil should be removed every 

 spring and fresh substituted. The flowers . are brilliant. The 

 following are a few of the best: Cinnabarinus, red, spring; coccineus, 

 scarlet, late summer (see Botanical Magazine, t. 1075);. an d multi- 

 florus (Kalbreyeri), scarlet, spring (Bot. Mag., tt. 961 and 1995). 



Ha-ha. A sunk fence. 



Halesia, Snowdrop Tree (hale-sia, after Dr. Hales. Ord. Strya- 

 ceae). H. tetraptera is a beautiful small deciduous tree, which 

 bears charming white Snowdrop-like flowers in July. It likes a 

 sheltered position in the shrubbery and a light, loamy, well-drained 

 soil. Propagation is by root cuttings in a frame in spring, or by 

 seeds. Very little pruning is required, but the bush should be kept 

 shapely. 



