1. A flower, separate.

2. The pistil with its three styles.

B. - Aristolochia Clematitis, Linnaeus

A. - Polygonum Bistorta, Linnaeus; p. 115.

1. A flower, separate.

2. The pistil with its three styles.

B. - Aristolochia Clematitis, Linnaeus: p, 116.

1. A flower complete.

2. The pistil, showing the rayed stigma and epigynous stamens.

3. A capsule.

C. - Pinus sylvestris, Linnaeus: p. 117.

1. One of the pairs of leaves, with its sheath.

2. One of the male catkins, with its bract.

3. An anther, with its two adnate cells, and scale-like connective.

4. One of the scales of the female catkin, with its two naked ovules.

5. Inner view of a similar scale when mature, with its two winged seeds. D. - Tamus communis, Linnaeus: p. 118.

1. One of the male flowers with stamens.

2. One of the female flowers with inferior ovary and threebranched style.

3. The style, separate.

4. A ripe berry.

Plate 19.

Polygonum Bistorta.

Polygonum Bistorta.

Aristoiochia Clematitis.

Aristoiochia Clematitis.

Pinus sylvestris.

Pinus sylvestris.

Tamus communis

Tamus communis

W.Fitch. del. et lith

Vincent Brooks. Lmp