1688

ARBORETUM AND FRUTICETUM.

PART III.

being glutinous, in their hoary appearance, and in the absence of tufts of hairin the axils of the nerves of the leaves. It was introduced into Englandin 1780, but has not been much cultivated. There are plants at Messrs.Loddiges’s 30 ft. high. It forms a very handsome tree, and well deserves aplace in ornamental plantations.

Varieties.

5 A. i. 2 ladniata Lodd. Cat.,ed. 1836.—The leaves are slightly laciniated.There are trees in the Horticultural Society’s Garden, and atMessrs. Loddiges’s.

31 A. i. 3 glauca; A. glauca Michx. N. Amer. Sylv., Lodd. Cat., ed. 1836 ;Netula incana var. glauca Ait.; Black Alder, Amer., has the leavesdark green above, and glaucous beneath : the petioles are reddish.According to Michaux, this forms a tree, in the United States, from18 ft. to 20 ft. high. This is one of the most beautiful kinds of thegenus.

31 A. i. 4 angulata Ait.—Leaves green underneath, with the petioles green.

Other Varieties. A. americana Lodd. Cat., A. canadensis Lodd. Cat.,and A. rubra Lodd. Cat., appear to belong to this species ; but the plantsin the Hackney arboretum are so small, that we have not been able tosatisfy ourselves that they are sufficiently distinct to constitute varieties.

a 4. A. serrula'ta Willd. The saw-leaved Alder.

Identification. Willd. Sp. PI., 4. p. 336.; Baum., p. 21. ; N. Du Ham., 2. p. 216.; Pursh FL Amer.Sept., 2. p. 623.; Michx. N. Amer. Syl., 2. p. 113. ; Load. Cat., ed. 1836.

Synonymes • Itetula serrulata Ait. Hort. Kcw ., 3. p. 338.; B. rugosa Ehrh. Beitr., 3. p. 21 DuRoi liarb. Baum., 1. p. 176.; Wang. Amer., p.-86.; 'i A. americana Lodd. Cat., ed. 1836; P A.canadensis Lodd. Cat., 1836; common Alder, Amer. ; Hazel-leaved Alder.

Engravings. Wang. Amer., t. 29. f. 60.; Abbott’s Insects, 2. t. 92.; Michx. N. Amer. Syl., t. 75.f, 1. ; and our Jig. 1544., on which are exhibited the larva, pupa, and perfect insect of the Noctua(Acronycta) hastilifera, Phalanna hastulifera Abb. and Smith , the American alder dagger moth,which inhabits this tree.

Spec. Char., §c. Leaves obovate, acuminate; veins and their axils hairy on theunder side. Stipules elliptic, obtuse. ( Willd. Sp. PL, iv. p. 336.) A shrub,

from 6 ft. to 10 ft. high ; a native of North America, in swamps and on riversides. According to Michaux, it is frequent along the sides of brooks, butabounds most in places covered with stagnant water. Its leaves are of abeautiful green, about 2 in. long, oval, distinctly furrowed on the surface,and doubly denticulated at the edge. The wood, when cut into, is white;