. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Section of naked ovule of Pi/nis maritima, as ob- served in January of the second year, 150 diam. The spherical embryo-sac is filled with cells, tho walls of which are already thickened by gela- tinous deposition. Two pollen grains occupy the funnel-shaped space between the wide micropyle and the summit of the nucleus. The cellular tissue of the latter is penetrated by two tubes emanating from the pollen grains. At the dotted line the tissue of the ovule becomes continuous with that of the spermophore. sac now become lar
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Section of naked ovule of Pi/nis maritima, as ob- served in January of the second year, 150 diam. The spherical embryo-sac is filled with cells, tho walls of which are already thickened by gela- tinous deposition. Two pollen grains occupy the funnel-shaped space between the wide micropyle and the summit of the nucleus. The cellular tissue of the latter is penetrated by two tubes emanating from the pollen grains. At the dotted line the tissue of the ovule becomes continuous with that of the spermophore. sac now become larger than the rest, and are destined to contain the germs of the future embryos. As their development proceeds, these bodies, the so-called corpuscula, assume an elongated, oval form, and the space in- tervening between their summits and the membrane of the embryo-sac is occupied by four small cells on the same level, which arc Fig. Four cells which surmount the corpitsciilnm of Finns sytvestris, seen from above, 200 dittni. * To this tissue is commonly applied the term " albuminous ; It corresponds in its mode of origin with the "endosperm" (§ 10G.) of other Phanerogamic. K 1. 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 Todd, Robert Bentley, 1809-1860. London, Sherwood, Gilbert, and Piper
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