. The essentials of botany. Botany. PEANEROGAMIA. 241 which lies between the inner solid (woody) mass and the outer softer portion. 510. The Angiosperms are readily separated into two sub-classes, as follows: Sub-Class I. Monocotyledones (the Monocotyledons).— The first leaves produced by the embryo are alternate; the endosperm is usually large and the embryo small. Sub-Class II. Dicotyledones (the Dicotyledons).—The first leaves of the embryo (cotyledons) are opposite; the endosperm is very often rudimentary or entirely wanting, and the embryo is generally FiQ. 136.—Longitudinal secti
. The essentials of botany. Botany. PEANEROGAMIA. 241 which lies between the inner solid (woody) mass and the outer softer portion. 510. The Angiosperms are readily separated into two sub-classes, as follows: Sub-Class I. Monocotyledones (the Monocotyledons).— The first leaves produced by the embryo are alternate; the endosperm is usually large and the embryo small. Sub-Class II. Dicotyledones (the Dicotyledons).—The first leaves of the embryo (cotyledons) are opposite; the endosperm is very often rudimentary or entirely wanting, and the embryo is generally FiQ. 136.—Longitudinal section of the seed oE Indian Corn, c, adiierent wall of the ovary; n, remains of the style; s/, base of the ovary (all the remainder of the figure is the true seed); egr, e70, endosperm; sc, ss, cotyledon; e, its epi- dermis; A, ; w, the main root; w', roots springing from the stem. Magnified 6 times. Sub-Class I. The Monocottledons {Monocotyledones). 511. The first leaves of the embryo are alternate; hence we say that they have one cotyledon. The ^venation of 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York, Holt
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