Akene of Anemone, enlarged, cut in half to show the seed in it, (Gray, 1858).
Akene of Clematis and feathery tail, (Gray, 1858).
A separate pod of the Wild Columbine, (Gray, 1858).
The five pods of the Wild Columbine opening, (Gray, 1858).
Flower of Larkspur, (Gray, 1858).
Four petals of Larkspur, (Gray, 1858).
Flower of Wolfsbane, or Monkshood, (Gray, 1858).
Flower of Laurel-Magnolia, (Gray, 1858).
Stamen of Laurel, magnified, (Gray, 1858).
The Laurel cone of fruit, the seeds hanging as they drop, (Gray, 1858).
The stamen of the Papaw, (Gray, 1858).
The shoot of the Barberry, (Gray, 1858).
The cluster of leaves and raceme of the Barberry, (Gray, 1858).
Enlarged individual flower of the Barberry, (Gray, 1858).
Enlarged petal of the Barberry, (Gray, 1858).
A stamen, with the anther opening, of the Barberry, (Gray, 1858).
Flower and bud of White Water-Lily, (Gray, 1858).
Eleven-celled pistil White Water-Lily, (Gray, 1858).
Fruit of Nelumbo, (Gray, 1858).
Leaves of Pitcher-plant, one of them cut off, (Gray, 1858).
A flower of Poppy.
A flower-bud of the Poppy,casting its calyx.
Pod of Celandine opening, (Gray, 1858).
Bulb of Dicentra, in the herb family,(Gray, 1858).
Flowers and leaf of Dicentra, in the herb family,(Gray, 1858).
Flower of Dicentra, in the herb family,(Gray, 1858).
Flower of Mustard, (Gray, 1858).
Stamens and pistil of Mustard, (Gray, 1858).
Flower of Frostweed, (Gray, 1858).
The calyx and pistil of Frostweed, (Gray, 1858).
The ovary of Frostweed, cut across and magnified, (Gray, 1858).
Pistils united in St. John's Wort, (Gray, 1858).
Flowers of St. John's Wort, (Gray, 1858).
Pod of St. John's Wort, cut in half,(Gray, 1858).
piece of Side-flowering Sandwort,(Gray, 1858).
Flower of Sandwort, magnified(Gray, 1858).
Pistil of Sand-Spurrey cut through lengthwise and magnified, (Gray, 1858).
Ovary of Sand-Spurrey, cut across (Gray, 1858).
Pistil and flower of Catchfly cut through lengthwise, (Gray, 1858).
Half of the flower of the common Purslane, (Gray, 1858).
Claytonia or Spring Beauty, (Gray, 1858).
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.
The pistil of the American Linden, cut in two.
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 False Indigo, in the Pea family.
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.
