. Elementary botany. Botany. DIMORPHISM OF FERNS. 343 leaves, the general plan of which is the same, and we recognize each as being a leaf. 626. Transformation of tie fertile leaves of onoclea to sterile ones. —It is not a \er3' rare thing to find plants of the sensitive fern which show intermediate conditions of the sterile and the fertile leaf A number of years ago it was thought by some that this represented a different species, but now it is known. Fig. 447- .Sensitive fern, showing one vegetative leaf and two sporophylls completely transformed. that these intermediate forms are partly tra
. Elementary botany. Botany. DIMORPHISM OF FERNS. 343 leaves, the general plan of which is the same, and we recognize each as being a leaf. 626. Transformation of tie fertile leaves of onoclea to sterile ones. —It is not a \er3' rare thing to find plants of the sensitive fern which show intermediate conditions of the sterile and the fertile leaf A number of years ago it was thought by some that this represented a different species, but now it is known. 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- 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 time reached the same height, some of the fruiting leaves which develop later will be transformed. A fe^\' years ago I cut off the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atkinson, George Francis, 1854-1918. New York, H. Holt
Size: 1313px × 1904px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany
