. Plant studies; an elementary botany. Botany. Pig. 12. Two clumps of rcscttes of tlie house leek (Sempervivu?)}), the one to the right showing tiie compact winter condition, the one to the left with rosettes more open after being kept indoors for several days. 22. Branclied leaves.—Another notuljle feature of foliage leaves, which has something to do with the light-relation, is that on some plants the blatle does not consist of one piece, but is lobed or even Ijrokcii up into separate pieces. When the divisions are distinct they are called leaflets, and every gradation in leaves can be found,
. Plant studies; an elementary botany. Botany. Pig. 12. Two clumps of rcscttes of tlie house leek (Sempervivu?)}), the one to the right showing tiie compact winter condition, the one to the left with rosettes more open after being kept indoors for several days. 22. Branclied leaves.—Another notuljle feature of foliage leaves, which has something to do with the light-relation, is that on some plants the blatle does not consist of one piece, but is lobed or even Ijrokcii up into separate pieces. When the divisions are distinct they are called leaflets, and every gradation in leaves can be found, from distinct leaf- lets to lobed leaves, toothed leaves, and finally those whose margins are not indented at all (entire). This dift'erence in leaves jirobably has more important rea- sons than the light- relation, hut its sig- nificance may be ob- served in this connec- tion. In those plants whose leaves are un- divided, the leaves generally either di- minish in size toward the to]3 of the stem, or the lower ones de- jjo, j3. The leavesof a bellllower (Cto»/OT«!/to), velop longer petioles. showing the rusctte arrangement. The lower Tt, t-lTiQ P'-isP the erpn petioles are successively longer, carrying then: in tnib cabe tne ^eu blades beyond the shadow of the blades above, eral outline of the —Alter Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1900
