. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Pia. vernation of tulip tree. Fig. 58. Leaf of bluepalmetto, un-foldine, 60 ZESSONS WITS PLANTS the individual parts of the leaf (or leaflets) arerecurved. (The pupil will also observe the leaf- like bud-scales,and the leaf-scars.) It is notnecessary, there-fore, that the-parts of a leafbe folded in thesame manner asthe entire leaf A fern shootis represented inFig. 61. A sideview of the un-rolling or uncoil-ing tip is shownat a, and a front view—showing some of theparts exp
. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Pia. vernation of tulip tree. Fig. 58. Leaf of bluepalmetto, un-foldine, 60 ZESSONS WITS PLANTS the individual parts of the leaf (or leaflets) arerecurved. (The pupil will also observe the leaf- like bud-scales,and the leaf-scars.) It is notnecessary, there-fore, that the-parts of a leafbe folded in thesame manner asthe entire leaf A fern shootis represented inFig. 61. A sideview of the un-rolling or uncoil-ing tip is shownat a, and a front view—showing some of theparts expanded — at 6. This is a circinate orcoiled method of folding, and is not common asidefrom the ferns and their allies, although it occursin the sundew. 63. We find, then, that there are various waysin which the miniature members are folded inthe bud. If we were to examine a honeysuckleshoot (Fig. 56), we should observe that the edgesof the leaves alternately overlap. That is, oneedge of each leaf lies in the trough or hollow. l-iG. of horse-chestnut. THE OPENING OF THE BUDS, CONCLUnED 61 of the other, so that they may be said to beastride. If we examine the common white wil-low, however, we shall find that one leaf com-pletely enfolds another. There are, then, two ele-ments in this tucking away in the bud,—the par-ticular manner in which each leaf is folded, andthe way in which one leaf lies upon another. Allthese matters are among the most interestingphenomena of spring time, and it has, therefore,come about that this prsefoliation or packing awayof the leaves in the bud is called vernation (in-directly from the Latin word for spring). In thesame way, thearrangement ofthe parts of theflower in the bud,— which followsthe same forms asthe leaves do, —is known as aesti-vation (indirectlyfrom the Latinfor summer). ^^^ ^^ ^ ,, ,, ,, Vernation of one of the cultivated ferns. 63a. Both the meth-od of folding and the arrangement of the parts is commonly represent
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Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
