Transactions and Proceedings, Volume 1 (Google eBook)

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University of Pennsylvania., 1899 - Botany
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Page 53 - ... primitive collateral bundle system prevails. 8. No internal phloem is present in the root. 9. A copious fungoid growth is found in the cortex of the root. Absorption of starch usually results in cells inhabited by the fungus. 10. No internal phloem is present in the lower portion of the hypocotyl, nor in the cotyledons. 1 1 . Two of the internal phloem patches of the stem arise just below the cotyledonary node, the other two just below the node bearing the first pair of leaves. 12. Internal phloem...
Page 136 - We may now review the various opinions which have been held concerning the cause and meaning of these. Delpino4 believed that cleistogamic flowers have been developed in order to ensure the production of seeds under climatic or other conditions, which tend to prevent the fertilization of the perfect flowers.
Page 257 - There were usually two types of granules present, one set which stained with haîmatoxylin, and contained "masked" iron and phosphorus and therefore resembled chromatin, but which became dissolved by artificial gastric digestion. These, which he called "granules of the first type," were hollow when they became large and divided at the time of cell division. They were usually found in the peripheral part of the central body, though they might extend to its central part or to the inner portion of the...
Page 422 - Near the type differs in habit of growth and range of distribution. Leaves rarely over 12 inches long, with a very narrow wing, erect hood, dark purple veined ; the lamina covered with a fine silky pubescence, apparently confined to the mountains of South Carolina and Alabama. Alabama, DeKalb County, Look-out Mountain, bank of Little River, about 1,700 feet." In Heller's "Catalogue of North American Plants," Second Edition (1900), page 92, Sarracenia Catesbaei, Ell., is recorded. In Mohr's "Plant...
Page 116 - ... (d) reduction and degeneration of the bundle system, and greater relative development of phloem than of xylem ; (e) small size of seed, primitive embryo, and development of this embryo within mass of (probably) precocious endosperm. (2) Stomata, where present, are on the more exposed places, ie, outer surfaces of upper bract-leaves, upper part of flower-stalk, outer sufaces of calyx and corolla. (3) Starch is present in great quantities...
Page 162 - ... nucleoli derive any part of their substance from the chromatin. In all the cases observed by me, the nucleus appears to assimilate a substance or substances from the cytoplasm, and after this substance has entered the nucleus it apparently undergoes there a chemical change, and becomes deposited on the inner surface of the nuclear membrane in the form of masses of varying dimensions, which may be either globular or irregular in shape, according as they are fluid or viscid in consistency. In the...
Page 322 - Zur Anatomic und Entwicklungsgeschichte der extranuptialen Nectarien von Dioscorea." Sitz.-Ber. d. K. Acad. d. Wiss., Wien, M.-N. Cl., Bd. xcvii, 1888. 19. Crato. — "Beitrage zur Anatomic u. Physiologic d. Elementarorganismus." Cohn's Beitrage z. Biologic d. Pflanzen, Bd. vii, 1896. 20. De Bary. — "Beitrag zur Kenntniss der Nostocaceen, insbesondere der Rivularien.
Page 42 - ... phloem is independent of the bundle and of different origin. The following papers have been specially consulted : Solereder, H. Ueber den systematischen Werth der Holzstructur bei den Dicotyledonen, 1885.
Page 162 - ... Nucleolus. — In ova of Nemerteans, nucleoli always appear in contact with the nuclear membrane, then wander toward the center. This appearance of the nucleolus near the nuclear membrane is explained by the fact that the nucleolus is extranuclear in origin. The author says he has found no evidence that the nucleoli derive any part of their substance from the chromatin. The nucleus seems to assimilate some substance from the cytoplasm, and after this has entered the nucleus it undergoes a chemical...
Page 101 - This last malvaceous plant, common farther south, seems to hold its own with the other components of the converted saline-marsh formation, as the following statistical table shows : STATISTICS OF FRUIT AND SEED PRODUCTION OF KOSTELETSKYA VIRGINICA...

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