Heath - Notes

See Erica and Chapter 19.

Hedera - Notes

This is the ivy genus. For good varieties see Chapter 18.

Hedgehog Holly - Notes

See Holly.

Hedge Plants - Notes

See Chapter 24.

Hedysarum - Notes

Multijugum is a deciduous shrub growing up to five feet high, with purplish red flowers in summer. Ordinary soil. Coronarium, the French Honeysuckle, is herbaceous.

Helianthemum - Notes

See Chapter 19. The named varieties of gardens and nurseries are forms of vulgare and are valuable for hot, dry, sunny banks, where the soil is poor and shallow. They will grow almost anywhere, are evergreen, and bloom all the summer.

Hemlock Spruce - Notes

Abies canadensis.

Hibiscus - Notes

Rose Of Sharon. The garden forms of syriacus (syn. Althaea f rut ex), such as rubis, Celeste, Meehani, Totus albus, La Reine, Admiral Dewey, Violet clair, Pompon Rouge, Puniceus, Alice, Leopoldii, monstruosa, Boule de feu and albo-plenus (there are many others, single and double) are very useful dwarf deciduous shrubs owing to their late period of flowering, which is late summer and autumn. There is a variegated form. The habit is neat and compact. The foliage is distinct and handsome. They are very good as standards. Ordinary soil if not damp and cold.

Hickory - Notes

See Carya.

Hippophae - Notes

Rhamnoides is the Sea Buckthorn, which grows on sand hills by the sea and has silvery foliage and yellow berries in late summer. It is suitable for planting inland near water. See Chapter 22. Two forms are offered: foemina and mascula; and as the sexes are on different plants it is necessary to plant both - as in the case of Aucubas - to insure berries. The forms are much alike in spring and summer. The female form is quite tree-like on clay soil at Aldenham House, near London, and berries freely on the lower part under the influence of a small bush of the male form growing near.