. Elementary botany : theoretical and practical. A text-book designed primarily for students of science classes connected with the science and art department of the committee of council on education . Botany. i6 Elementary Botany strong solution of the same substance, it enlarges by a pfOCegg of accretion—that is, a series of fresh layers form upon its exterior. I. II. Fig. 17.—I. Spherical cell from the flesh of the Peach. II. Ellipsoidal cell from the flesh of the Peach. III. Hour-glass-shaped cell from the flesh of the Peach. Growth by intussusception often produces a change in the sh
. Elementary botany : theoretical and practical. A text-book designed primarily for students of science classes connected with the science and art department of the committee of council on education . Botany. i6 Elementary Botany strong solution of the same substance, it enlarges by a pfOCegg of accretion—that is, a series of fresh layers form upon its exterior. I. II. Fig. 17.—I. Spherical cell from the flesh of the Peach. II. Ellipsoidal cell from the flesh of the Peach. III. Hour-glass-shaped cell from the flesh of the Peach. Growth by intussusception often produces a change in the shape of the cell. The normal form is more or less spherical; this, however, is rarely preserved except in the case of unicellular plants. If the wall grows more vigorously at the two extremities than at the sides, the cell will become oval or elliptical (fig. 17), then elongated (fig. 19), and lastly fusiform or spindle-shaped (fig. 18). On the other hand, if a very vigorous growth takes place at cer- tain parts whilst the rest of the cell wall is but slightly developed, several protuberances will be pro- duced upon the surface, and a stel- late or star-shaped cell is formed (fig. 20). Another cause modifying the shape of individual cells is to be found in their mutual pressure the one upon the other during Fig. 18.—I. Fusiform cell from the wood of the Spruce Fir, with bor- dered pits. II. Fusiform bast- fibre of^ 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 Edmonds, Henry. London and New York : Longmans, Green, and Co.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1888
