120 



THE DICTIONARY OF GARDENING, 



Hechtia continued. 



H. Ghiesbreghtii (Ghiesbreght's). fl. whitish, insignificant, 

 small, clustered on tall slender scapes. I. rosulate, recurved, 

 spiny, very ornamental, purple and green, silvery below. Mexico, 

 1863; (B.M.5842.) 



HEDAROMA. See Darwiuia. 



HEDERA (the old Latin name for the Ivy, used 

 by Virgil and Pliny). Ivy. OBD. Araliaceaa, A genus, 

 as now limited, containing but a couple of species of 

 tall climbing shrubs, of which the one in one or other 

 of its numberless forms is widely distributed throughout 

 the Northern hemisphere, and the second confined to 

 Australia. Flowers polygamous ; umbels paniculate. 

 Leaves undivided, lobed or pinnate, compound. Few 

 plants are more serviceable in both large and small 

 gardens than the old-fashioned Ivy, scarcely any situa- 

 tion being unsuitable for it. In a good rich soil, growth 

 is much more rapid than in a poor one ; and strong 

 plants, grown first in pots before placing out, well repay 

 for the extra preparation thus made, by covering their 

 allotted space in a much shorter time. Ivy is now ex- 

 tensively used to cover open railings, as an arbour, as 

 an edging plant, as a " screen " for a drawing-room, 

 for hanging baskets, and in several other ways. When 

 established, it is advisable to clip off all the old leaves 

 annually, about April, as a close growth is thereby in- 

 duced, and the old foliage is soon replaced by new. 

 Propagation is readily effected by cuttings of any 

 moderately firm young shoots, inserted in pots, or in the 

 open ground, preferably in autumn. The tree forms and 

 their numerous sports are grafted, any common strong- 

 growing climbing form being used as a stock. The others 

 may also be grafted, and the rarer variegated ones usually 

 are, as this method of increase is a much more rapid one 

 than cuttings. If cuttings are inserted in heat, and kept 

 shaded until roots are formed, good plants are obtained in 

 much less time than when placed in a cold frame, or in the 

 open air. 



H. anstraliana (Australian), fl., umbels pedunculate, with thr 

 peduncles almost verticillate along the elongated branches of :i 

 large, loose, terminal panicle. 7. large, pinnate, the rachis 

 articulate ; leaflets few, ovate, oval-oblong or ovate-lanceolate, 

 shortly acuminate, often above oin. long, smooth and shining, but 

 prominently veined. Queensland. A small, quite glabrous, green- 

 house tree. 



H. canesoens (hoary). A synonym of H. Helix algeriensis. 

 H. Cavendishii (Cavendish's). A synonym of H. Helix mar- 

 gin at a minor. 



H. cordata (heart-shaped). A synonym of H. Helix geutifolia. 

 H. elegantissima (most elegant). A synonym of H. Helix 



maryiitata rubra. 

 H. grandifolia (large-leaved). A synonym of //. Helix 



canariensis. 



H. Helix. Common Ivy. fl. yellowish-green ; borders of the 

 calyx entire ; petals five, broad and short ; stamens five. Autumn. 

 1. thick and shining, ovate, angular, or three or five-lobed ; those 

 of the barren stems usually much more divided than the upper 

 ones. Western and Southern Europe, Northern Africa, and West 

 Central Asia; extending over the whole of Britain. Of the 

 innumerable forms, the following are the best : 



Hedera continued. 



green. SYN. H. viridis (S. H. Ivy, 99). There is a variegated 

 form of this, which, although not particularly attractive in 

 a young state, is handsome when thoroughly established. 

 SYN. II. canescens. See Fi<r. 182. 



FIG. 183. HEDERA HELIX ARBORESCENS AUREA MACULATA. 



H. H. arborescens (arborescent). This is the " tree " form of the 

 common native Ivy of our woods and hedge banks. There are 

 sub-varieties, with golden (see Fig. 183) and silver variegation, 

 and one with yellow berries. 



H. H. aurantia (orange).* 1. like those of H. H. chrysocarpa, but 

 fruits of a beautiful reddish-orange colour. (R. H. 1884, 84.) 



FIG. 184. HEDERA HELIX CONGLOMERATA. 



H. H. canariensis (Canary Islands). Irish Ivy. This is the 

 common large-leaved climbing Ivy the best of all for quickly 

 clothing walls, or for forming a green carpet under trees or on 

 banks where grass, &c., refuses to grow. I. deep green, usually 

 five-lobed; terminal lobe largest. The fertile state of this, i.e., 

 that which has outgrown the climbing stage, and produces flowers 

 and fruit, has entire ovate leaves, and is propagated by grafting 

 on the type ; it is generally known in nurseries under the name 

 of H. H. arborescens. SYN. H. grandifolia. There is a variegated 

 form of this, but it is very apt to revert to the type. 



FIG. 182. HEDERA HELIX ALUERIENSIS 



I. H. algeriensis (Algerian).* I. yellowish-green, varying from 

 entire broad-ovate or orbicular to a peculiar rounded three-lobed 

 form. A fine rapid-growing variety, with large leaves of a cheerful 



FIG. 185. HEDEKA HELIX DESTATA. 



