| FIRST SQUARE FOOT. | |||
| Plant | 1, | pods | 0 |
| " | 2, | " | 10 |
| " | 3, | " | 4 |
| " | 4, | " | 13 |
| " | 5, | " | 0 |
| " | 6, | " | 12 |
| " | 7, | " | 3 |
| " | 8, | " | 1 |
| " | 9, | " | 4 |
| " | 10, | " | 3 |
| " | 11, | " | 0 |
| " | 12, | " | 25 |
| " | 13, | " | 2 |
| " | 14, | " | 0 |
| " | 15, | " | 0 |
| " | 16, | " | 10 |
| " | 17, | " | 2 |
| " | 18, | " | 0 |
| " | 19, | " | 0 |
| " | 20, | " | 0 |
| " | 21, | " | 0 |
| " | 22, | " | 6 |
| " | 23, | " | 1 |
| " | 24, | " | 5 |
| " | 25, | " | 2 |
| " | 26, | " | 3 |
| " | 27, | " | 0 |
| " | 28, | " | 3 |
| Total, | 28, | pods | 109 |
SECOND SQUARE FOOT. | |||
| Plant | 1, | pods | 1 |
| " | 2, | " | 50 |
| " | 3, | " | 36 |
| " | 4, | " | 15 |
| " | 5, | " | 48 |
| " | 6, | " | 34 |
| " | 7, | " | 9 |
| " | 8, | " | 11 |
| " | 9, | " | 9 |
| " | 10, | " | 3 |
| " | 11, | " | 0 |
| " | 12, | " | 7 |
| Total, | 12, | pods | 223 |
In the first square foot of ground, where the plants were much crowded, of the twenty-eight plants, ten produced no seed pods at all, and of the remaining eighteen only six produced over five each. On these plants an average of a little less than four pods per plant was produced. In the second lot, where, evidently, the plants were not nearly so crowded, only four produced fewer than five seed pods, and there was a general average of 18.7 pods per plant.
On the first foot of ground, then, there might be produced in the neighborhood of 1300 seeds; on the second, 2600. The large Solanum upon which 40,000 seeds were estimated would probably cover an area of 12.5 square feet, giving 3200 seeds per square foot. Of course, these figures represent only certain isolated cases, which in a way are typical, but must not be taken to represent the average condition.
The largest plant noted September 4 had produced 100 pods, with an average of thirteen seeds per pod; this plant might show 1300 seeds.
Professor Todd discusses in his paper the occurrence of similar divergences from the typical form in other Solanaceæ and Leguminosæ, and tries to discover some hint as to their origin. Lack of material for observation precludes any present discussion of these points.
The results of these observations may be briefly summarized as follows:
Solanum rostratum.
1. As Professor Todd observed, the numbers of right-and left-handed flowers on a plant of any considerable size are about equal.
2. As a general rule, only one flower opens at a time on a raceme, but very commonly two will open on the raceme the same morning, giving a right-and left-handed flower opening simultaneously, and thus permitting in a considerable number of cases pollination between flowers on the same raceme, even if Professor Todd’s theory of the method of pollination be the correct one.
3. Even on the smaller branches of the plant, the flowers are almost always approximately divided into the two types.