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 |
Rudbeckia laciniata | Cut-leaved Rudbeckia | 4 | Lemon-yellow | July to Aug. | Large daisy-like flowerheads with recurved ray flowers. Good for the wild-garden or border. A. G. I. | |
Rudbeckia laciniata var. flore-pleno | Golden Glow | 4 | 5-6 | Golden-yellow | July to Sept. | Effective as a background for other perennials. Flowers resemble large Chrysanthemums, and are produced in great abundance. Very showy. Transplant often. It is frequently planted too abundantly, so that its use cheapens the effect sought. It mildews badly in wet seasons. A.F.I. |
Rudbeckia maxima | Large Cone-flower | 4 | 5-6 | Deep yellow | Aug. & Sept. | Flower-clusters 5 to 6 inches across with dark cone-shaped centres and drooping ray flowers. Good in the hardy border or among shrubs. B. C. H. I. |
Rudbeckia speciosa | 4 | 3 | Orange-yellow with black centres | Aug. & Sept. | Resembles R. fulgida, but with larger flowers. A good border plant. A. G.I. | |
Rudbeckia subtomento-sa | 4 | 4 | Lemon-yellow | Aug. to Oct. | Large daisy-shaped flowers with dull brown centres. Very free flowering; a good plant for the border. A.G.I, | |
Ruta graveolens | Rue | 1 | 2-3 | Yellow-green | July | Foliage light green and prettily divided. Flowers fragrant, in small panicles. Pretty in the rockery or wild-garden. B. C. H. |
Salix alba | White Willow | 1 | 30-40 | T. A spreading, rapidly growing tree with yellow-brown bark and long, ashy-gray, silky leaves. Good for wet places and beautiful near water. A. D. F. | ||
Salix babylonica | Babylonian Willow | 1 | 30-40 | T. Branches olive-green, slender and drooping. Pretty as a single specimen to contrast with upright trees, and particularly attractive near water. B. C. D. F. | ||
Salix babylonica var. aurea | Golden-barked Weeping Willow | 1 | 30-40 | T. A form of the preceding with bright yellow bark. | ||
Salix babylonica var. dolorosa | Wisconsin Weeping Willow | 1 | 30-40 | T. In habit like S. babylonica, but more hardy. A. D. F | ||
Salix babylonica var. Salamoni | 1 | 30-40 | T. Somewhat similar to S. babylonica, but hardier; branches not quite so pendulous. A. D. F. | |||
Salix elegantissima | Thurlow's Willow | 1 | 30-40 | T. A spreading tree with long, pendent branches and yellow-green bark. Very attractive near water. A. D. F. |
 
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