. Essentials of botany. Botany; Botany. 116 ESSENTIALS OF BOTANY the cactuses (Fig. 81), and the green outer layers of the stem do the work of the leaves. 137. RoUed-Up Leaves. — Leaves which receive but a scanty supply of water are often protected from losing it. Fig. 80. Xerophytic Leaves of Australian Blackberry. I, leaflets reduced in many cases to bare midribs, in other cases showing a bit of Wade at the end; P, petiole. too rapidly by being rolled up, so that the evaporating, , stomata-containing, surface is on the inside of the roll. Sometimes, as in the crow-berry (Fig. 82), the cu
. Essentials of botany. Botany; Botany. 116 ESSENTIALS OF BOTANY the cactuses (Fig. 81), and the green outer layers of the stem do the work of the leaves. 137. RoUed-Up Leaves. — Leaves which receive but a scanty supply of water are often protected from losing it. Fig. 80. Xerophytic Leaves of Australian Blackberry. I, leaflets reduced in many cases to bare midribs, in other cases showing a bit of Wade at the end; P, petiole. too rapidly by being rolled up, so that the evaporating, , stomata-containing, surface is on the inside of the roll. Sometimes, as in the crow-berry (Fig. 82), the curled. 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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