. Elementary botany . Fig. 70. Pumpkin seedling showing apogeotropism. Seedling at the left placed hori- zontally, in 24 hours the stem has become erect. If we place a rapidly growing potted plant in a horizontal position by laying the pot on its side, the ends of the shoots will soon turn upward again when placed in a horizontal position. Young bean plants growing in a pot began within two hours to turn the ends of the shoots upward.

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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany