. A textbook of botany for colleges and universities ... Botany. Figs. 831, 832. — Leaf motility in the sensi- tive plant (Mimosa pudica): 831, an open leaf; S32, a leaf whose leaflets (/) have been closed by mechanical impact; note also that the petiole (p) has dropped; j', stipule; m, Figs. 833, 834. — Leaf motility in Oxalis: 833, open leaves as seen by day; 834, closed leaves as seen by night. some simple leaves exhibit motility, as in Portulaca oleracea (figs. 686, 687) and in Euphorbia polygonifolia, those of the latter closing along the median line like a book. Most leaf move
. A textbook of botany for colleges and universities ... Botany. Figs. 831, 832. — Leaf motility in the sensi- tive plant (Mimosa pudica): 831, an open leaf; S32, a leaf whose leaflets (/) have been closed by mechanical impact; note also that the petiole (p) has dropped; j', stipule; m, Figs. 833, 834. — Leaf motility in Oxalis: 833, open leaves as seen by day; 834, closed leaves as seen by night. some simple leaves exhibit motility, as in Portulaca oleracea (figs. 686, 687) and in Euphorbia polygonifolia, those of the latter closing along the median line like a book. Most leaf movements are due to changes in the turgescence of the delicate cells that make up the body of the enlarged base (known as the pulvinus) of the petiole or petiolule (leaflet stalk) ; the central position of the delicate conductive bundle and the absence of mechanical cells facilitate motility. Closing may be due to a decrease of turgescence, as in drought, or to an increase, which is greater on one side than on the. 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; Barnes, Charles Reid, 1858-1910, joint author; Cowles, Henry Chandler, 1869- joint author. New York, Cincinnati [etc] American book company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
