. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. .704 SPIR^A SPIR^A 31. albiildra, Miq. {S. Japdiiica dlha, Kegel. S. leu- cdiitha, Lange). Fig. 2367. Low slirub, \M ft. high, with stiff, upright branches: Ivs. lanceolate, coarsely or sometimes doubly serrate, glabrous, 1-2 in. long: tls. white, in dense corymbs, one large terminal and many smaller ones below
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. .704 SPIR^A SPIR^A 31. albiildra, Miq. {S. Japdiiica dlha, Kegel. S. leu- cdiitha, Lange). Fig. 2367. Low slirub, \M ft. high, with stiff, upright branches: Ivs. lanceolate, coarsely or sometimes doubly serrate, glabrous, 1-2 in. long: tls. white, in dense corymbs, one large terminal and many smaller ones below, forming a kind of raceme; disk prominent; sepals retlexed in fr.: follicles upright, not or little diverging. July, Aug. Japan. 32. sup^rba, Zabel (S. albifidra x corymbosa). Low shrub, with striped dark brown : Ivs. elliptic- oblong to oblong, acute at both ends, simply or doubly serrate, almost glabrous, 1-3 in. long: fls. rather large, pink or almost whitish; disk prominent; petals orbicu- lar or broadly obovate. June, July. Of garden origin. -SMS^. 2367. Spiraea albiflora (X}^). 33. corymbosa, Raf. {S. cratmgifdlia, Link.). Low shrub, with usually little-branched stems, rarely to 3 ft. high: branches purplish brown: Ivs. broadly oval to ovate, acutish, coarsely and often doubly serrate, espe- cially above the middle, pale bluish green beneath and glabrous, lX-3 in. long: fls. white, rather small, in somewhat convex usually pubescent corymbs, lJ^-3 in. across; petals oval: follicles and styles upright. May, June. N. J. to Ga. 7:671. 34. lilcida, Dougl. Closely allied to the former: branches yellowish brown or brown: Ivs. more incisely serrate, oval or obovate: corymb glabrous, tisually looser and more flat, broader. June, July. Dakota to Brit. Col. and Oregon. The allied S. Virginiana, Britt., is more branched and higher: Ivs. oblong to ob- lanceolate, dentate above the middle or almost entire: inflorescence glabrous. Va. to N. G. 2:197. 35. betulifdli
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