This shows the branch of Hop Hornbeam, Ostrya virginiana, showing the staminate aments as they appear…
This is the branch of Red Birch, Betula nigra, showing the staminate aments as they appear in winter,…
This shows the four staminate and one pistillate ament of Sweet Birch, Betula lenta, (Keeler, 1915).
This shows the pistillate and staminate aments of Hop Hornbeam, Ostrya virginiana, (Keeler, 1915).
This shows the pistillate and staminate aments of Hornbeam, Carpinus caroliniana, (Keeler, 1915).
This shows the pendulous strobiles, or fruit, of the Paper Birch, Betula papyrifera, (Keeler, 1915).
This shows the erect strobile, or fruit, of the Red Birch, Betula nigra, (Keeler, 1915).
This shows the erect strobile, or fruit, of the Sweet Birch, Betula lenta (Keeler, 1915).
This shows the pendulous strobiles, or fruit, of the White Birch, Betula populifolia, (Keeler, 1915).
This shows the erect strobile, or fruit, of the Yellow Birch, Betula lutea (Keeler, 1915).