[1 & 2]

July 31' & Aug 1' 1878 Arachis Hypogæa

circumnutation of Gynophores in Hot-House dependent in nat. Position.

Arachis IV.

(Fig 224)

(same scale)

Arachis hypogæa: circumnutation of vertically dependent young gynophore, traced on vertical glass, from 10 a.m July 31' to 8 a.m Augt 2d.

[2v]

51

Ipomoea

had been sown, and the seedlings allowed to struggle together, the crossed plants had at first no great advantage. At one time the tallest crossed was 25 1/8 inches high, and the tallest self-fertilised plants 21 3/8. But the difference afterwards became much greater. The plants on both sides, from being so crowded, were poor specimens. The flowers were allowed to fertilise themselves spontaneously self fertilised under a net; those on the crossed plants produced 37 pods, those on capsules, & the self-fertilised plants only 18, or as 100 to 47. The former contained on an average per pod 3.62 seeds per capsule; and the latter 3.38 seeds, or as 100 to 93. Combining these data (i.e. number of capsules and average number of seeds) the crowded crossed plants produced seeds compared with the self-fertilised as 100 to 45. These latter seeds, however, were decidedly heavier (a hundred weighing 36.79 grains 41.64 grains) than those from the capsules on the crossed plants, of which a hundred weighed 36.79 grains; this