The two-cleft calyx and pod of Claytonia or Spring Beauty, (Gray, 1858).
Ripe pod of Claytonia or Spring Beauty, cut across, and splitting into three valves (Gray, 1858).
The flower of the Marsh-Mallow.
Magnified cross-section of a flower-bud of the American Linden.
The Common Flax flower, of the Order Linaceae.
The Common Flax flower, of the Order Linaceae, cut in half.
The flower of a Buckthorn.
The flower of a Buckhorn, cut in half.
The flower of False Indigo, in the Pea family, with the petals removed.
The flower of Amorpha, in the Pea family.
The flower of Amorpha, in the Pea family, with petals removed.
The flower of the American Crab-Apple.
Common Bluet, of the Order Rubiaceae.
Section of a flower of the Common Bluet, of the Order Rubiaceae.
Section of a flower of the Common Bluet, of the Order Rubiaceae.
Flowers of Chickory, all with strap-shaped corollas.