An Introduction to Botany

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Longman, 1832 - Botany - 557 pages
 

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Page 6 - Thysanotus fasciçularii, the flowers of which are of a deep brilliant violet, with a remarkably satiny lustre, that appearance will be found to arise from each particular cell containing a single drop of...
Page 521 - ... verging to green. Again, the ranunculus, which is originally of an intense yellow, sports into scarlet, red, purple, and almost any colour but blue. White flowers, which have a tendency to produce red, will never sport to blue, although they will to yellow ; the rose, for example, and chrysanthemums. It is also probable that white flowers with a tendency to produce blue, will not vary to yellow.
Page 113 - Leucas, and Anactorium, beside his kingdom of Corinth. He was said to have died of a broken heart over his son's death. Per'ianth, in botany, the floral envelopes, the calyx and corolla, or either, especially when the calyx and corolla are combined so that they cannot be satisfactorily distinguished from each other, as in the tulip, orchis, etc. See FLOWER. Peribon'ka River, Canada, an affluent of Lake Saint John, in the province of Quebec, over 400 miles long. It flows from about lat. 52° N., southward...
Page 317 - Class I. Class II. Class III. Class IV. Class V. Class VI. Class VII. Class VIII.
Page 217 - ... upon which vegetable life depends. A few forms of tissue interwoven horizontally and perpendicularly constitute a stem ; the developement, by the first shoot that the seed produces, of buds which grow upon the same plan as the first shoot itself, and a constant succession of the same phenomenon, causes an increase in the length and breadth of the plant ; an expansion of the bark into a leaf, within which ramify veins proceeding from the seat of nutritive matter in the new shoot, the provision...
Page 213 - ... phenomenon called the flow of the sap is fully completed, to continue with greater or less velocity till the return of winter. The axis of the buds elongates upwards, forming leaves and buds in the same way as the parent shoot : in like manner also each bud sends down its roots, in the form of fibres within the bark and above the wood of the shoot from which it sprang ; thus forming on the one hand a new layer of wood, and on the other a fresh deposit of bark.
Page 515 - ... discovering the leaf in the seed-vessel, notwithstanding the variable structure of that part and its peculiar combinations. Thus the pod is a leaf which is folded up and grown together at its edges, and the capsules consist of several leaves grown together, and the compound fruit is composed of several leaves united round a common centre, their sides being opened so as to form a communication between them, and their edges adhering together.
Page 211 - ... portion of wood that is deposited : these fibres, by their action, now compel the root to emit little ramifications. Previously to the elongation of the plumula its apex has acquired the rudimentary state of a leaf: this continues to develope as the plumula elongates, until, when the first internodium of the latter ceases to lengthen, the leaf has actually arrived at its complete formation. When fully grown it repeats in a much more perfect manner the functions previously performed by the cotyledons...
Page 264 - It they are withdrawn after this time, and exposed to the air, they ripen extremely well ; but if the times mentioned are much exceeded, they undergo a particular alteration, and will not ripen at all . Ripe fruit exposed to the air rots and decays. In this case, it first changes the oxygen of the surrounding air into carbonic acid, and then liberates from itself u large quantity of the same acid gas.
Page vi - It is by no means, as some suppose, a science for the idle philosopher in his closet ; neither is it merely an amusing accomplishment, as others appear to think ; on the contrary, its field is in the midst of meadows, and gardens, and forests, on the sides of mountains, and in the depths of mines, — wherever vegetation still flourishes, or wherever it attests by its remains the existence of a former world. It is the science that converts the useless or noxious weed into the nutritious vegetable...

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