. Fossil plants : for students of botany and geology . Paleobotany. Fig. 496. A, Pachyteata incrassala. B, Polypterocarpus anglicus. (A, after Renault; B, after Kidston.) endotesta (fig. 497, t): as Ohver suggests, these plates may have served a mechanical purpose for the support of the bulky nucellus. The peripheral region of the nucellus is supplied by several vascular bundles (fig. 497, n) from the tracheal chalazal disc. The exo- testa is regarded by Ohver as corresponding to the sarcotesta and sclerotesta of other seeds, and the grooves in the endotesta interlocking with the nucellar ridg
. Fossil plants : for students of botany and geology . Paleobotany. Fig. 496. A, Pachyteata incrassala. B, Polypterocarpus anglicus. (A, after Renault; B, after Kidston.) endotesta (fig. 497, t): as Ohver suggests, these plates may have served a mechanical purpose for the support of the bulky nucellus. The peripheral region of the nucellus is supplied by several vascular bundles (fig. 497, n) from the tracheal chalazal disc. The exo- testa is regarded by Ohver as corresponding to the sarcotesta and sclerotesta of other seeds, and the grooves in the endotesta interlocking with the nucellar ridges are compared with 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 Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
