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.

Villarsia nymph.

Polcmoniun crulcum

Polcmoniun coerulcum

Convolvulus arvensis

Convolvulus arvensis

Solanum Dulcamara

Solanum Dulcamara

W Fitch. del. et. bith

Vincent Brooks Imp.