On the three plants, with 36 racemes bearing branches, there were 18 branches which produced only one kind of flowers. Of these branches, however, 15 bore only 1 flower each. From this it will be seen that the flowers opening at the same time on any one branch are not all either right-or left-handed. In the large branches, A and B, the number of the two kinds is quite evenly distributed; in only one case-branch B of plant III—is a large per cent. of the flowers alike. Even in branches of the second denomination—Aa, Bb—flowers of one kind occur exclusively, where more than one flower is found, only in Ba of plant III. In addition to the above table, observations were made on three plants to determine the regularity with which they bore right-and left-handed flowers. On three successive mornings the plants had produced: ═══════════════╤═════════════════╤═════════════════╤════════════════╕ │ I. │ II. │ III. │ ├────────┬────────┼────────┬────────┼────────┬───────┤ │ Right. │ Left. │ Right. │ Left. │ Right. │ Left. │ ───────────────┼────────┼────────┼────────┼────────┼────────┼───────┤ First morning │ 7 │ 7 │ 6 │ 6 │ 8 │ 9 │ Second morning │ 7 │ 11 │ 10 │ 7 │ 14 │ 17 │ Third morning │ 16 │ 10 │ 8 │ 12 │ 13 │ 10 │ ├────────┼────────┼────────┼────────┼────────┼───────┤ Total │ 30 │ 28 │ 24 │ 25 │ 35 │ 36 │ ───────────────┴────────┴────────┴────────┴────────┴────────┴───────┘ It will be noticed that when a marked excess of flowers of one kind occurs one morning, a somewhat proportionate excess of the other type occurs the following morning. This is of course necessary if an equal number of the two types of flowers are to be produced and, to a certain extent, to be maintained on the same plant; and is to be expected from the alternate occurrence of the two types on opposite sides of the raceme. The flowers open early in the morning and remain open from three to four days, depending somewhat upon the condition of the weather. Some which were covered with cheese-cloth “tents” were noticed to remain open almost a week. At the end of this period the corolla wilts and falls off, as does also the pistil. The flowers seem to partially close at night. A limited series of experiments were made to determine if self-fertilization and cross-fertilization between flowers of the opposite type opening simultaneously on the same raceme are possible.[I] The writers have not made sufficiently extensive observations to arrive at any general conclusions of value as to the comparative fertility of cross-and self-pollination, either between flowers on the same or different racemes, or between the flowers of different plants, but they have been able to obtain a limited series of definite results which may be of interest.