Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . of the orthotropous ovule (o), andreached the embryo-sac (s), near the embryonal vesicle (v). FORMATION OF THE EMBRYO. 307 two embryos in the seed of the Mistletoe ; and there is usually aplurality of embryos in Pines and other Gymnospermous plants(560), though all but one 519 550 551 532 533 are more commonly abor-tive or rudimentary. Thereare other striking peculiar-ities in the fecundation ofPines, &c, which, however
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . of the orthotropous ovule (o), andreached the embryo-sac (s), near the embryonal vesicle (v). FORMATION OF THE EMBRYO. 307 two embryos in the seed of the Mistletoe ; and there is usually aplurality of embryos in Pines and other Gymnospermous plants(560), though all but one 519 550 551 532 533 are more commonly abor-tive or rudimentary. Thereare other striking peculiar-ities in the fecundation ofPines, &c, which, however,cannot be readily explained withoutentering into more detail than ishere advisable.* In Pines and theirallies, moreover, the embryo is notdeveloped until a long time after theapplication of the pollen, and thefilling of the embryo-sac with the cellular tissue which forms the basis of the albumen of the seed; the fruit and seed oftrue Pines, as is wellknown, not maturing un-til the year after thatin which the blossomsappear. 580. The further development and the structure of the embryoand the seed must be considered after the Fruit, of Avhich it consti-tutes a
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
