. Elementary botany . Fig. 447. Sensitive fern, showing one vegetative leaf and two sporophylls completely transformed. that these intermediate forms are partly transformed fertile leaves. It is a very easy matter in the case of the sensitive fern to pro- i duce these transformations by experiment. If one in the spring, when the sterile leaves attain a height of 12 to 16 cm (8-10 inches), cuts them away, and again when they have a second I time reached the same height, some of the fruiting leaves which develop later will be transformed. A few years ago I cut off the

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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany