. Contributions from the Hull Botanical Laboratory. Plants. 164 BOTANICAL GAZETTE [September was received, and from the fact that I have received other materia] from the same source belonging to this In cross-section a staminate cone shows about ten to twelve sporo- phylls, each with two sporangial cavities (fig. i). The vascular system seems to be rather weakly developed, but shows a distinct endarch collateral bundle (fig. j) corresponding to each sporophyll. Just outside of the bundle there usually is found a resin canal (fig. i).. Fig. B.—Buttressed base of P. dacrydioides, in an
. Contributions from the Hull Botanical Laboratory. Plants. 164 BOTANICAL GAZETTE [September was received, and from the fact that I have received other materia] from the same source belonging to this In cross-section a staminate cone shows about ten to twelve sporo- phylls, each with two sporangial cavities (fig. i). The vascular system seems to be rather weakly developed, but shows a distinct endarch collateral bundle (fig. j) corresponding to each sporophyll. Just outside of the bundle there usually is found a resin canal (fig. i).. Fig. B.—Buttressed base of P. dacrydioides, in ancient forest of Canterbury Plain, N. Z.—Photograph by L. Cockayne. The resin canals contain little material of any sort in the preparations available for study. The distinctly glandular cells lining them (fig. 2) suggest, however, that they are functional. The number varies in different strobili, but in those examined did not fall below six nor exceed eighteen or twenty. The sporophylls as seen from the upper surface are somewhat spatulate, with a rather pointed apex. Fig. 4 presents an outline 1 We have received from Dr. Cockayne two excellent photographs of P. dacry- dioides, which are reproduced on account of their general interest (figs. A and B).. 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 Hull Botanical Laboratory. [Chicago : University of Chicago Press
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1895
