A. - Villarsia nymphseoides, Ventenat: p. 104.

1. A portion of the throat of the corolla, showing the attachment of the stamens.

2. The pistil.

B. - Polemonium coeruleum. Linnaeus: p. 105.

1. A portion of the throat of the corolla, showing the insertion of the stamens.

2. The pistil, surrounded by an annular disk.

3. A capsule.

C. - Convolvulus arvensis, Linnaeus: p. 106.

1. One of the stamens.

2. The pistil, surrounded by an annular disk. D. - Solanum Dulcamara, Linnaeus: p. 109.

1. A flower, showing the connivent anthers.

2. One of the anthers separate, showing the terminal pores.

3. The pistil.

Plate 16.

Villarsia nymph.

Polcmoniun coerulcum

Convolvulus arvensis

Solanum Dulcamara

W Fitch. del. et. bith

Vincent Brooks Imp.