. La botanique pour les jeunes et les écoles communes. Comment les plantes poussent, une simple introduction à la botanique structurels. Avec une flore populaire, ou un arrangement et description des plantes communes, à la fois sauvage et cultivée. La botanique, la botanique. MODE DE VIE DANS LES éternelles. 31 76. Dans certains des herbacées vivaces, tiges ou branches sous sol sont épaissis avec ce magasin de nourriture de toute leur longueur, ce qui rend le stout porte-greffes, comme on les appelle, comme dans Sweet Flag, le sceau de Salomon (Fig. 63), et d'Iris, ou d'une fleur-de-Luce (Fig. 64). Ces sont vivaces, et se développer sur une petite voie chaque année, de mourir autant beh

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. Botany for young people and common schools. How plants grow, a simple introduction to structural botany. With a popular flora, or an arrangement and description of common plants, both wild and cultivated. Botany; Botany. MODE OF LIFE IN PERENNIALS. 31 76. In some perennial herbs, prostrate stems or branches under ground are thickened with this store of nourishment for their whole length, making stout Rootstocks, as they are called; as in Sweet Flag, Solomon's Seal (Fig. 63), and Iris, or Flower-de- Luce (Fig. 64). These are perennial, and grow on a little way each year, dying off as much behind after a while; and the newer parts every year send out a new set of fibrous roots. The buds which rootstalks produce, and the leaves or the scales they bear, or the scars or rings which mark where the old leaves or scales have fallen or decayed away, all plainly show that rootstocks are forms of stem, and not roots. Tlie large round scars on the root- stock of Solomon's Seal, which give the plant its name, (from their looking like impressions of a seal, ) are the places from which the stalk bearing the leaves and flowers of each season has fallen off in autumn. Fig. 03, a is the bud at the end, to make the growth above ground next spring; b is the bottom of the stalk of this season ; c, the scar or place from which the stalk of last year fell; d, that of the year before; and e, that of two years ago. J^ 77. Finally, the nourishment for the next year's growth may be deposited in the leaves themselves. Sometimes it occupies all the leaf, as in the Houseleek (Fig. 65) and other ifit. fleshy plants. Here the close ranks of the thickened leaves are wholly above ground. Sometimes the deposit is all in the lower end of the leaf, and on the ground, or un- derneath, as in common Bulbs. Take a White Lily of the gardens, for example, in the fall, or in spring before it sends up the stalk of the season (Fig. 66). From the bottom of the bulb, roots descend into the soil to absorb moistur

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• bookcentury1800
• bookdecade1850
• booksubjectbotany
• bookyear1858