. Our native trees and how to identify them : a popular study of their habits and their peculiarities . Trees. stipulate. Apparently they often appear in pairs, but these pairs are really borne on spur-like two-leaved lateral branchlets. The flowers are monoscious, opening with or before the leaves and borne in three- flowered clusters in the axils of the scales of drooping or erect aments. Staminate aments are pendulous, clustered or solitary in the axils of the last leaves of the branch of the year or near the ends of the short lateral branchlets of the year. They form in early autumn and re
. Our native trees and how to identify them : a popular study of their habits and their peculiarities . Trees. stipulate. Apparently they often appear in pairs, but these pairs are really borne on spur-like two-leaved lateral branchlets. The flowers are monoscious, opening with or before the leaves and borne in three- flowered clusters in the axils of the scales of drooping or erect aments. Staminate aments are pendulous, clustered or solitary in the axils of the last leaves of the branch of the year or near the ends of the short lateral branchlets of the year. They form in early autumn and re- main rigid dur- ing the winter. The scales of the staminate aments when mature are broadly ovate, rounded, yellow or orange color below the middle, dark chestnut brown at apex. Each scale bears two bractlets and three sterile flowers, each flower consisting of a sessile, membranaceous, usually two-lobed, calyx. Each calyx bears four short fila- ments with one-celled anthers or strictly, two filaments divided into two branches, each bearing a half-anther. Anther cells open longitudinally. The pistillate aments are erect or pendulous, solitary ; terminal Four Staminate and One , , , , , ,â , , , Pistiuate Ament of °" ''^^ two-leaved lateral spur-like branch- Sweet Birch, Bciuta lets of the year. The pistillate scales are oblong-ovate, three-lobed, pale yellow green often tinged with red, becoming brown at maturity. These scales bear two or three fertile flowers, each flower consisting of a naked ovarj'. The ovary is 2q6 Branch of Red Birch, Bcttda nigra. Show- ing the Staminate Aments as they Ap- pear in Winter. Unta. Staminate Aments 3' to 4' long. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Keeler, Harriet L. (Harriet Louise), 1846-1921. New York : C. Scribner's Sons
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