This section is from the book "A Practical Handbook Of Trees Shrubs Vines And Herbaceous Perennials", by John Kirkegaard. Also available from Amazon: A practical handbook of trees, shrubs, vines and herbaceous perennials.
Botanical Name | English Name | 1 Deciduous 2 Evergreen 3 Vine 4 Herbaceous Perennial | Ultimate Height in feet | Color | Time of Bloom | Remarks |
Hypericum densiflorum | 1 | 2 1/2 | Yellow | Aug. & Sept. | S. Individual flowers small but produced in great quantity, completely covering the shrub. Very dense in growth. A beautiful dwarf shrub. A.G. | |
Hypericum Kalmianum | 1 | 3 | Yellow | July & Sept. | S. Resembles H. aureum, but the flowers are smaller and the plant more open and erect in growth. A. G. | |
Hypericum moseria-num | Gold Flower | 4 | 1 | Yellow | July & Aug. | Dark glossy leaves and large, single, bright yellow and orange flowers. Good for the rockery or border. B. C. H. |
Hyssopus officinalis | Hyssop | 4 | 2 | Purple | June to Aug. | Flowers in small spikes; leaves gray, narrow. Very aromatic; good as an edging for flower-beds, but valued mostly for its medicinal qualities. A.G. |
Iberis saxatilis | Hardy Candytuft | 2&4 | 6 in. | White | May & June | An excellent plant for edging or for the rock-garden. Foliage dark green; flowers in pretty clusters in great masses. A. G. |
Iberis saxatilis var. cori-folia | 2&4 | 4 in. | White | May & June | Particularly good for the rock-garden. Showy flowers on slightly drooping stems. A. G. | |
Iberis sempervirens | Evergreen Candytuft | 2&4 | 1 | White | May & June | Excellent for edging or border planting. Fine dark, glossy foliage and flowers completely covering the plant. A.G. |
Ilex crenata | 2 | 6 | Yellow | May & June | S. Bushy in habit. Foliage resembles that of the Box-wood. A good hedge-plant for sheltered places and excellent for massing with deciduous shrubs. B. C. E. G. | |
Ilex glabra | Inkberry | 2 | 5 | Yellow | June | S. Leaves oval and dull green. Flowers insignificant. Showy black berries in racemes. A. E.G. |
Ilex opaca | Holly | 2 | 8 | Yellow | June | S. Particularly pretty in winter with its scarlet berries. Excellent among deciduous shrubs for winter effect. Should be severely pruned when transplanted. B. C. E. F. |
Ilex verticillata | Black Alder | 1 | 6 | Yellow | June | S. One of the best hardy shrubs with ornamental red fruits, which remain on the branches until mid-winter. It is rather open in growth and should be planted among other shrubs. It prefers a moist soil, but can be grown successfully in any situation. A. E.G. |
Incarvillea Delavayi | 4 | 2 | Purple | June & July | Flowers trumpet-shaped in clusters. Very decorative. Foliage fern-like about 1 foot long. B. C. H. |
 
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