. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. 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 theflow
. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. 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 represented by a diagrammaticeross-section of the swelling buds. The great Linnteus defined the methodsof vernation (or foliation) by the diagrams which are reproduced inFig. 62. The key is as follows: No. 1, convolute; 2, involute;. 62 ZJSSSOJVS WTTB PLANTS 3, revolute [evidently meant to ? represent a leaf bottom side up]; 4, oonduplicate; 5, equitant [one leaf wholly enfolding another] ; 6, 5. ©^
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Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
