The Families of Flowering Plants: Supplement to the Plant World; Vol; III, IV, and V., 1900 1902 (Classic Reprint) - Hardcover

Pollard, Charles Louis

Hardcover

ISBN 10: 0267984235 ISBN 13: 9780267984237

Verlag: Forgotten Books, 2019

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Excerpt from The Families of Flowering Plants: Supplement to the Plant World; Vol; III, IV, and V., 1900 1902

The flowering plants form a subkingdom known to botanists bv various designations. The terms at present generally accepted in this country is Spermatophyta, which is derived from two Greek words signifying seed and plants, in allusion to the fact that they bear seed rat her than Spores. Recent histological researches have demonstrated, however, that there is a distinct homology between the reproductive organs of the lower groups in the vegetable kingdom and those of the flowering plants, so that the word seed as contrasted with spore is a term of greater convenience than scientific accuracy. Another name for the flowering plants, which will be found in most of the older manuals, is Phanerogamia, a word also of Greek construction, signify ing visible reproduction, in allusion to the fact that the latter process is effected by distinct floral organs. The modern German systematists have adopted a compound term Embryophyta Siphonogama, which sig nifies plants developed from an embryo and accomplishing fertilization by means of a pollen tube which sprouts from the pollen grain. For detailed explanations Of the reproductive process in plants the reader is referred to the various standard text books on vegetable morphology and physiology; but in order that certain distinctions in classification may be more clearly brought out, it is necessary at this point to give a few definitions of the essential organs involved.

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Über diese Auflage

• Verlag: Forgotten Books
• Erscheinungsdatum: 2019
• ISBN 10: 0267984235
• ISBN 13: 9780267984237
• Einband: Tapa dura
• Anzahl der Seiten: 282