The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . TURAL BOTANY. beneath the surface-soil, after the leaves and annual stems haveperished. 237. The tubek is an annual thickened portion of a subterra-nean stem or branch, provided with latent buds called eyes,from which new plants ensue the succeeding year. It is the factof its origin with the ascending axis, and the production of buds,that places the tub
The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . TURAL BOTANY. beneath the surface-soil, after the leaves and annual stems haveperished. 237. The tubek is an annual thickened portion of a subterra-nean stem or branch, provided with latent buds called eyes,from which new plants ensue the succeeding year. It is the factof its origin with the ascending axis, and the production of buds,that places the tuber among stems instead of roots. The Po-tato and Artichoke are examples. 238. The stem of the Potato-plant sends out roots from its base, and branches above,like other plants; but we observe that its branches have two distinct modes of develop-ment. Those branches which rise into the air, whether issuing from the abovegroundor the underground portion of the stem, expand regularly into leaves, etc.; while thoselower branches which continue to grope in the dark, damp ground, cease at length toelongate, swell up at the ends into tubers with developed buds and abundance of nutri-tious matter in reserve for renewed growth the following TifJbers as iliey rirow.—2&i. The common Potato (Solaniim). 261, Artichoke (Helianthus). 262. Sweet• Potato (Convolvulus). 239. The coem is an underground, solid, fleshy stem, withcondensed internodes, never extending, but remaining of arounded form covered with thin scales. It is distinguished fromroots by its leaf-bud, which is either borne at the summit, as inthe Crocus, or at the side, as in the Golchicum and Putty-root(Aplectrum). FOEMS OF SCALE-STEMS. 81 240. The Bulb partakes largely of the nature of the bud. Itconsists of a short, dilated axis, bearing an oval mass of thickfleshy scales, closely packed above, a circle of adventitious rootsaround its base, and a flowering stem from the terminal, or alateral bud.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1870
