The natural history of plants, their forms, growth, reproduction, and distribution; . Fig. 153.—Agaves of the Mexican uplands (from a photograph). {Taxodium mucronatum) has even been found with a girth of 51*88 metres; thiscircumference exceeds that of the above-mentioned stem of Centunculus more thana hundred thousand times. The thickness of the stem is in general greatest at thebase and gradually tapers off above; only a few palms are thicker immediatelybelow their crown of green leaves than at the base, and in the strange cotton-treesof the Brazilian catingas (Cavanillesia tuherculata) of M
The natural history of plants, their forms, growth, reproduction, and distribution; . Fig. 153.—Agaves of the Mexican uplands (from a photograph). {Taxodium mucronatum) has even been found with a girth of 51*88 metres; thiscircumference exceeds that of the above-mentioned stem of Centunculus more thana hundred thousand times. The thickness of the stem is in general greatest at thebase and gradually tapers off above; only a few palms are thicker immediatelybelow their crown of green leaves than at the base, and in the strange cotton-treesof the Brazilian catingas (Cavanillesia tuherculata) of Mhich an illustration isinserted opposite, the stem forms a swollen, barrel-shaped mass attaining its maxi- 658 STEMS BEARING FOLIAGE-LEAVES. mum about half-way up. Very often an unequal thickening may be observed inthe foliage-stem; this is due to the fact that at the places where leaves arise fromthe stem knotty swellings are developed, while those portions of the stem whiclicome between successive leaf-insertions (or nodes), and which are called internodes,are cylindrical or p
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1902
