. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. ABSORPTION-CELLS ON LEAVES. 239 this is the case, teeth of the kind are found on this narrow green ridge which runs along the groove. In Telehia, a handsome herbaceous plant of wide distribution in the south-east of Europe, these teeth—conical or club-shaped—springing from the margin of the petiole-groove are incurved, and are in general so placed that their blunt apices project into the groove. But precisely on these obtuse tips of the teeth are situated cells with very thin outer walls easily perme
. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. ABSORPTION-CELLS ON LEAVES. 239 this is the case, teeth of the kind are found on this narrow green ridge which runs along the groove. In Telehia, a handsome herbaceous plant of wide distribution in the south-east of Europe, these teeth—conical or club-shaped—springing from the margin of the petiole-groove are incurved, and are in general so placed that their blunt apices project into the groove. But precisely on these obtuse tips of the teeth are situated cells with very thin outer walls easily permeable to water, and having contents with a strong attraction for it. Thus, as soon as the groove of the. Fig. 56.—Water-receptacles. 1 In a Teasel, Bipsacus laciniatus. 2 In the American SUphiwn perfoliatum. petiole is filled with rain, collected from the surface of the leaf, the tips of the conical teeth are moistened, and they suck up the water. Lastly, we have to mention the curious receptacles appertaining to foliage- leaves in which water from the atmosphere accumulates and continues to stand for Weeks without being protected from evaporation by the excretion of special substances. Any region or portion of the leaf may participate in their construction. In Saxifraga peltata the lamina is shaped like a shield and forms a shallow plate with the concave surface turned to the sky. In the Cloud-berry (Rubus Cha/mce- morus) the formation of basins is brought about by the margins of the reniform lamina being superimposed over one another as if to make a spathe. In the various species of Winter-green, especially in Pyrola vmifiora, the pale cauline leaves,. 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 Kerner von Marilaun, Anton, 1831-1898; Oliver, F. W. (Francis Wall), 1864-1951; Busk, Marian (Balfour)
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1895
