Manual of Gardening Part 39

Sumac, smooth and hairy, _R. glabra_(A) and _R. typhina._(A)

Useful for the borders of large groups and belts. They may be cut down every year and allowed to sprout (as in Fig. 50). The young tops are handsomest. _R. glabra_ is the finer species for this purpose. They usually grow 10-15 ft. tall.

Osbeck's sumac, _R. semialata_ var. _Osbeckii._

Strong bush, 10-20 ft., with leaf-rachis strongly winged, the foliage pinnately compound.

Flowering, or fragrant currant, _Ribes aureum._(A)(DD)

Well known and popular, for its sweet-scented yellow flowers in May; 5-8 ft.

Red-flowering currant, _R. sanguineum._(A)

Flowers red and attractive; 5-6 ft. _R. Gordonianum,_ recommendable, is a hybrid between _R. sanguineum_ and _R. aureum._

Rose acacia, _Robinia hispida._(A)(DD)

Very showy in bloom; 8-10ft.

Roses, _Rosa,_ various species.

Hardy roses are not always desirable for the lawn. For general lawn purposes the older sorts, single or semi-double, and which do not require high culture, are to be preferred. It is not intended to include here the common garden roses; see Chapter VIII for these. It is much to be desired that the wild roses receive more attention from planters.

Attention has been too exclusively taken by the highly improved garden roses.

[Ill.u.s.tration: Fig. 263. Rosa rugosa.]

j.a.panese rose, _Rosa rugosa._(DD)

Most excellent for lawn planting, as the foliage is thick and not attacked by insects (Fig. 263); white and pink flowered forms; 4-6 ft.

Wild swamp rose, _R. Carolina._(A) 5-8 ft.

Wild dwarf rose, _R. humilis_(A) (_R. lucida_ of Michigan). This and other wild dwarf roses, 3-6 ft., may be useful in landscape work.

Say's Rose, _R. acicularis_ var. _Sayi._(A) Excellent for lawns; 4-5 ft.

Red-leaved rose, _R. ferruginea (R. rubrifolia_).(DD) Excellent foliage; flowers single, pink; 5-6 ft.

j.a.panese bramble, _Rubus crataegifolius._ Valuable for holding banks; spreads rapidly; very red in winter; 3-4 ft.

Flowering raspberry, mulberry (erroneously), _R. odoratus_(A) Attractive when well grown and divided frequently to keep it fresh; there is a whitish form; 3-4 ft.

j.a.panese wineberry, _R. phaenicolasius._ Attractive foliage and red hairy canes; fruit edible; 3-5 ft.

Kilmarnock willow, _Salix Capraea,_ var. _pendula._ A small weeping plant grafted on a tall trunk; usually more curious than ornamental.

Rosemary willow, _S. rosmarinifolia_(DD) of nurserymen _(R. incana_ properly). 6-10 ft.

Shining willow, _S. lucida._(A) Very desirable for the edges of water; 6-12 ft.

Long-leaved willow, _S. interior._(A) Our narrowest-leaved native willow; useful for banks; liable to spread too rapidly; 8-12ft.

Fountain willow, _S. purpurea._ Attractive foliage and appearance, particularly if cut back now and then to secure new wood; excellent for holding springy banks; 10-20 ft.

p.u.s.s.y willow, _S. discolor_(A) Attractive when ma.s.sed at some distance from the residence; 10-15 ft.

Laurel-leaved willow, _S. pentandra (S. laurifolia_ of cultivators)(DD) See under Trees, p. 329. Many of the native willows might well be cultivated.

Elders, _Sambucus p.u.b.ens_(A) and _S. Canadensis._(A) The former, the common "red elder," is ornamental both in flower and fruit. _S.

Canadensis_ is desirable for its profusion of fragrant flowers appearing in July; the former is 6--7 ft. high and the latter 8-10 ft.

Golden-leaved elder, _S. nigra_ var. _foliis aureis,_(DD) and also the cut-leaved elder, are desirable forms of the European species; 5-15 ft.

Buffalo-berry, _Shepherdia argentea_(A) Silvery foliage; attractive and edible berries; 10-15 ft., often tree-like.

Shepherdia, _S. Canadensis._(A) Spreading bush, 3--8 ft., with attractive foliage and fruit.

Early spirea, _Spiraea arguta._(DD) One of the earliest bloomers among the spireas; 2-4 ft.

Three-lobed spirea, bridal wreath,_S. Van Houttei._(DD) One of the most showy early-flowering shrubs; excellent for ma.s.sing; blooms a little later than the above; 3-6 ft.

Sorbus-leaved spirea, _S. sorbifolia (Sorbaria sorbifolid_).(DD) Desirable for its late blooming,--late June and early July; 4-5 ft.

Plum-leaved spirea, _S. prunifolia._

Fortune's spirea, _S. j.a.ponica (S. callosa_),(DD) 2 to 4 ft.

Thunberg's spirea, _S. Thunbergii._ Neat and attractive in habit; useful for border-hedges; 3-5 ft.

St. Peter's Wreath, _S. hypericifolia;_ 4-5 ft.

Round-leaved spirea, _S. bracteata._(DD) Follows Van Houttei; 3-6 ft.

Douglas' spirea, _S. Douglasii._(A) Blossoms late,--in July; 4-8 ft.

Hard-hack, _S. tomentosa._(A) Much like the last, but less showy; 3-4 ft.

Willow-leaved spirea,_S. salicifolia._(A)(DD) Blooms late; 4-5 ft.

Bladder-nut, _Staphylea trifolia_(A) Well-known rather coa.r.s.e native shrub; 6-12 ft.

Colchican bladder-nut, _S. Colchica._ Good early flowering shrub; 6-12 ft.

[Ill.u.s.tration: Fig. 264. A spirea, one of he most servicable flowering shrubs.]

Styrax, _Styrax j.a.ponica._ One of the most graceful of flowering shrubs, producing fragrant flowers in early summer; 8-10 ft. or more.

Snow-berry, _Symphoricarpos racemosus._(A)(DD) Cultivated for its snow-white berries, that hang in autumn and early winter; 3-5 ft.

Indian currant, _S. vulgaris._(DD) Foliage delicate; berries red; valuable for shady places and against walls; 4-5 ft.