. Plants and their uses; an introduction to botany . Native home, Eurasia. stalk of its own, called a petiolule.^ Such leaves are classed asdivided or compound. If, as in this example, the leaflets ortheir petiolules spring directly from the main petiole the leafis distinguished as once-compound; when, as in baneberries,the branching of the blade is carried a stage farther andthe leaflets or their petiolules from branches of thepetiole, the leaf becomes ticice-compound; or the subdivisionmay be carried still farther, as in columbines. A leaf morethan once compounded is termed decompound
. Plants and their uses; an introduction to botany . Native home, Eurasia. stalk of its own, called a petiolule.^ Such leaves are classed asdivided or compound. If, as in this example, the leaflets ortheir petiolules spring directly from the main petiole the leafis distinguished as once-compound; when, as in baneberries,the branching of the blade is carried a stage farther andthe leaflets or their petiolules from branches of thepetiole, the leaf becomes ticice-compound; or the subdivisionmay be carried still farther, as in columbines. A leaf morethan once compounded is termed decompound. Since in1 Pct-i-o-lulo < L. pttiohdus, diminutive of peiiolua, petiole. 340 THE CROWFOOT FAMILY all these cases the branching of the blade follows the palmateplan the leaves are conveniently described as palmatelydivided, or palmately once-, twice-, or decompound. The leavesof the Christma-s rose and some other members of the familyare peculiar in having the lateral divisions not quite sepa-rated, thus making them in a way intermediate between. Fig. 294.—Bracts and petals of peony connected by intermediate marked G are green; Y, yeUow; and R, red. (Original.)
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
