RHODOTHAMNUS CHAMAECISTUS (syn Rhododendron Chamaecistus).—Ground Cistus. Alps of Austria and Bavaria, 1786. A very handsome shrub, of small growth, and widely distributed in Bavaria, Switzerland, and elsewhere. Planted in peaty soil and in a rather damp, shady situation it thrives best, the oval-serrate leaves, covered with white, villous hairs, and pretty rosy flowers, giving it an almost unique appearance. It is a charming rock shrub and perfectly hardy.
RHODOTYPOS.
RHODOTYPOS KERRIOIDES.—White Kerria. Japan, 1866. A handsome deciduous shrub, and one that is readily propagated, and comparatively cheap. It is distinct and pretty when in flower, and one of the hardiest and most accommodating of shrubs. The leaves are handsome, being deeply serrated and silky on the under sides, while the pure white flowers are often about 2 inches across. It grows about 4 feet in height, and is a very distinct and desirable shrub.
RHUS.
RHUS COTINUS.—Smoke Plant, Wig Tree, or Venetian Sumach. Spain to Caucasus, 1656. On account of its singular appearance this shrub always attracts the attention of even the most unobservant in such matters. It is a spreading shrub, about 6 feet high, with rotundate, glaucous leaves, on long petioles. The flowers are small and inconspicuous, but the feathery nature of the flower clusters, occasioned by the transformation of the pedicels and hairs into fluffy awns, renders this Sumach one of the most curious and attractive of hardy shrubs. Spreading about freely, this south European shrub should be allowed plenty of room so that it may become perfectly developed.
R. GLABRA (syns R. caroliniana, R. coccinea, R. elegans, and R. sanguinea).—Smooth or Scarlet Sumach. North America, 1726. A smaller tree than the last, with leaves that are deep glossy-green above and whitish beneath. The male tree bears greenish-yellow flowers, and the female those of a reddish-scarlet, but otherwise no difference between the trees can be detected. R. glabra laciniata (Fern Sumach) is a distinct and handsome variety, with finely cut elegant leaves, and a dwarf and compact habit of growth. The leaves are very beautiful, and resemble those of the Grevillea robusta. It is a worthy variety.
R. SUCCEDANEA.—Red Lac Sumach. Japan, 1768. This is not often seen planted out, though in not a few places it succeeds perfectly well. It has elegant foliage, each leaf being 15 inches long, and divided into several pairs of leaflets.
R. TOXICODENDRON.—Poison Oak or Poison Ivy. North America, 1640. This species is of half-scandent habit, with large, trifoliolate leaves, which turn of various tints of red and crimson in the autumn. It is quite hardy, and seen to best advantage when allowed to run over large rockwork and tree stumps in partial shade. The variety R. toxicodendron radicans has ample foliage, and is suited for similar places to the last. The leaves turn bright yellow in the autumn.
R. TYPHINA.—Stag's Horn Sumach, or Vinegar Tree. A native of North America (1629), and a very common shrub in our gardens, probably on account of its spreading rapidly by suckers. It is, when well grown, a handsome and distinct shrub or small tree, with large, pinnate, hairy leaves, and shoots that are rendered very peculiar by reason of the dense hairs with which they are covered for some distance back. The dense clusters of greenish-yellow flowers are sure to attract attention, although they are by no means pretty. R. typhina viridiflora is the male-flowered form of this species, with green flowers.
R. VENENATA (syn R. vernix).—Poison Elder, Sumach, or Dogwood. North America, 1713. This is remarkable for its handsome foliage, and is the most poisonous species of the genus.