. A textbook of botany for colleges and universities ... Botany. Fig. 873. — Leaf variation in the hare- bell {Campdnula rotundifolia); the apex of the shoot has been cut off, and lateral buds have developed at b and b'\ note that the first leaves of the axillary rosettes are short and roundish, as in seedlings and basal rosettes; such an occurrence sometimes is called a reversion to a juvenile stage. — From Figs. 874,873. — Leaf variation in the arbor vitae (Thuja occidentals); 874, a seedling, showing the cotyledons (c) and the awl-shaped " juvenile " leaves (/); 875, an
. A textbook of botany for colleges and universities ... Botany. Fig. 873. — Leaf variation in the hare- bell {Campdnula rotundifolia); the apex of the shoot has been cut off, and lateral buds have developed at b and b'\ note that the first leaves of the axillary rosettes are short and roundish, as in seedlings and basal rosettes; such an occurrence sometimes is called a reversion to a juvenile stage. — From Figs. 874,873. — Leaf variation in the arbor vitae (Thuja occidentals); 874, a seedling, showing the cotyledons (c) and the awl-shaped " juvenile " leaves (/); 875, an older plant, showing " juvenile " leaves (/) and the first lateral branches bearing scale-shaped "adult" leaves (a). and to low temperature by night. The large size and the thinness of the mesophytic leaf, on the other hand, are due to the less extreme influence of the factors (transpiration, heat, light, etc.) pro- ducing the xerophytic leaf, supplemented by the optimum amount of. 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
