Morning glory, e.g.

Usage examples of ipomoea.

Those who support transfer from Polynesia point to the fact that they can find no evidence for the sweet potato on Rapa Nui before 1600 AD, but surely this is not entirely fair, given that ipomoea batatas does not preserve well in sediment.

Moreover, with Ipomoea, and probably all other twiners, the stem of the young plant, before it begins to twine, is highly heliotropic, evidently in order to expose the cotyledons or the first true leaves fully to the light.

The cotyledons of several other species of Ipomoea likewise sink downwards late in the evening.

Thus with different species, and with different individuals of the same species, there were many gradations from a single diurnal movement to oscillations as complex as those of the Ipomoea and Cassia.

With all the above species of Ipomoea, when the two cotyledons on the same seedling were unequally depressed at night, this seemed to depend on the position which they had held during the day with reference to the light.

There are, however, some strong exceptions to this rule, as the cotyledons of Gossypium, Anoda and Ipomoea do not possess pulvini, yet continue to move and to grow for a long time.

The ipomoea stayed briefly, held by the tension of droplets, and then, carried off by them, drifted to the ground.

Although the downward movement cannot be attributed to the weight of the cotyledons in the several cases which were investigated, namely, in those of the Anoda, Ipomoea purpurea and bonanox, nor in that of I.

Thus the movements of the cotyledons of Brassica oleracea and of Ipomoea caerulea, which are not provided with pulvini, are as complex as those of Oxalis and Cassia which are thus provided.

Seeds of Helianthus annuus and of two species of Ipomoea (those of 'I.

He fought his way through the ipomoea, the perennial morning glory whose vines plagued the castle and garrison in a spreading, entangling joke.