. Foundations of botany. y veined leaves) or to the midrib (in pinnatelyveined ones). Such divided leaves are shown in and 97. In still other leaves, known as compound leaves, thepetiole, as shown in Fig. 102 {palmately compound), or the midrib, as shown in Fig. 103 (pin^nately compound), bears what look tobe separate leaves. These dijffer intheir nature andmode of originfrom the portionsof the blade of adivided leaf. Oneresult of this dif-ference appears inthe fact that sometime before thewhole leaf is ready-to fall from thetree or other plantin autumn, theseparate portionsT3v^ 1/v. T
. Foundations of botany. y veined leaves) or to the midrib (in pinnatelyveined ones). Such divided leaves are shown in and 97. In still other leaves, known as compound leaves, thepetiole, as shown in Fig. 102 {palmately compound), or the midrib, as shown in Fig. 103 (pin^nately compound), bears what look tobe separate leaves. These dijffer intheir nature andmode of originfrom the portionsof the blade of adivided leaf. Oneresult of this dif-ference appears inthe fact that sometime before thewhole leaf is ready-to fall from thetree or other plantin autumn, theseparate portionsT3v^ 1/v. T>- * 1^ or leaflets of a Fig. 104. — Pinnately Compound Leaf of compouud leaf are Pea. A tendril takes , . , the place of a terminal SCCU tO bC JOmted ^^^^^^- at their attach- ments, just as whole leaves are to the part of the stem fromwhich they grow. In Fig. 102 the horse-chestnut leaf isshown at the time of falling, with some of the leafletsalready disjointed. That a compound leaf, in spite of the joints of the.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1901
