The Botanical Text-book ...Wiley & Putnam, 1842 - 413 Seiten |
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Häufige Begriffe und Wortgruppen
2-celled acrid adherent æstivation albumen alternate aments anthers apex aromatic astringent axil axis bark base berry bitter bracts branches buds called calyx capsule carbonic acid carpels cell cellular tissue chalaza chiefly coherent color commonly compound ovary consists contain corolla corymb cotyledons cultivated dehiscence destitute dissepiments distinct drupe elongated embryo emetic Endogens Examples Exogenous fibres filaments fleshy floral envelopes flowers fruit furnished genera Geography Group grow herbs hilum imbricated inner juice latter leaf leaves less united lobes magnified margins nearly numerous one-seeded opposite ORDER organs ovary Ovary compound Ovary free ovules parietal placentæ peduncle perianth pericarp petals petiole pistils placenta portion produced Properties raceme radicle receptacle regular roots seeds sepals separate shrubs single solitary sometimes species stamens stamens inserted stem stigmas stipules styles substance summit surface suture termed terminal tion Trees or shrubs tribe tropical trunk tube usually vegetable veins Vertical whorl wood woody yield
Beliebte Passagen
Seite 166 - raised in the garden of the Horticultural Society from seeds taken from the stomach of a man, whose skeleton was found thirty feet below the surface of the earth, at the bottom of a barrow which was opened near Dorchester. He had been buried with some coins of the Emperor Hadrian ; and it is therefore probable that the seeds were sixteen or seventeen hundred years old.
Seite 321 - Stamens as many as the lobes of the corolla and alternate with them, or fewer.
Seite 191 - ... or description of each group, when fully given, actually expresses all the known particulars in which the plants it embraces agree among themselves, and differ from other groups of the same rank. This complete analysis being carried through the system, from the primary divisions down to the species, it is evident that the study of a single plant of each group will give a correct (so far as it goes) and often- a sufficient idea of the structure, habits, and even the sensible properties of the...
Seite 171 - The same phenomena occur if the germination takes place upon dead wood or inorganic substances : a number of seeds were glued to the surface of a cannon ball ; all the radicles were directed towards the centre of the ball. Hence it is obvious that the tendency of the miseltoe is not towards the surface of its nutrition, but it obeys the attraction of the body upon which it grows. The miseltoe, which does not grow on the earth, obeys the attraction of any other body ; while those...
Seite 191 - ... particulars; and to combine the subordinate groups into larger natural assemblages, and these into still more comprehensive divisions, so as to embrace the whole vegetable kingdom in a methodical arrangement. All the characters which plants present, that is, all the points of agreement or difference, are employed in their classification ; those which are common to the greatest number of plants being used for the primary grand divisions ; those less comprehensive for subordinate groups, &c. ;...
Seite 202 - DE CANDOLLE) pursue the opposite course, beginning with the most perfect flowering plants, and concluding with the lowest grade of flowerless plants. The first mode possesses the advantage of ascending by successive steps from the simplest to the most complex structure ; the second, that of passing from the most complete and best understood to the most reduced and least known forms; or, in other words, from the easiest to the most difficult ; and is therefore the best plan for the student."* These...
Seite 166 - ... was opened near Dorchester. He had been buried with some coins of the Emperor Hadrian, and it is probable, therefore, that the seeds were sixteen or seventeen hundred years old.
Seite 187 - POLYGAMIA (nolvg, many, fafiog, marriage), where the stamens and pistils are separate in some flowers, and united in others, either on the same or two or three different plants.