. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Pig. leaf of cobea. single pair of leaf-lets, but each leafletis curiously lobed,and tendrils are spring-ing from the end. Weare now convinced thattendrils may be modi-fied parts of This leaf inFig. 95 is interest-ing, because it showsalso a variation orchange which isforeign to the normal type or tendency of theleaf. That is, we know that the terminal leaf-let in the cobea isa tendrU ; if othertendrils appear, weshould expect them toarise from the completetransformation
. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Pig. leaf of cobea. single pair of leaf-lets, but each leafletis curiously lobed,and tendrils are spring-ing from the end. Weare now convinced thattendrils may be modi-fied parts of This leaf inFig. 95 is interest-ing, because it showsalso a variation orchange which isforeign to the normal type or tendency of theleaf. That is, we know that the terminal leaf-let in the cobea isa tendrU ; if othertendrils appear, weshould expect them toarise from the completetransformation of oneof the lateral leaf-lets. Instead ofthis normal behav-ior, however, thelateral leaflets havebecome strangely Pie 95 shaped, and tendrils Monstrous leaf of ZHSGUZSHS OF LEAVES 99 are endeavoring to form in most unu-sual places. 108a. Such strange and abnormal variations ctransformations as these, wherever they occur, aiknown as monstrosities (or monstrous forms). Thdahlia leaf (Fig. 91), is not a, monstrosity, because iassumes a form which is habitual to the plant anwhich conforms with its general structure. 109. A pitcher plant, or spotteltrumpet leaf, of the South, is draw:in Fig. 96. There is a similar species in northern bogs. The structurand its position upon the plant bothshow that it is a leaf. Here, then,the leaf is a pitcher or water-holdingreceptacle, and the mass of capturedinsects and other animals is no doubtdigested and absorbed as plant-food. 109a. It is known that certain plants absorbthe juices of insects which are caught in trapsand killed, and that others make use of the ac-cumulated mass of organic matter or humus whichis caught in various kinds of cups or pupil who desires to pursue this interestingsu
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Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
