. Botanica elementare . La botanica. Frutto 87 (ii) endosperma, ma nessun perisperm: Buttercup, viola malva, olio di ricino, di piante ed erbe (fig. 118). (Iii) Perisperm con poco una traccia di endosperma : Stellaria (fig. 117). Outgrowths sulle sementi.-Il viola e l'euforbia hanno ciascuno un piccolo grumo vicino al micropyle (fig. 158). Molti outgrowths sono interessati con la dispersione del seme : per esempio, i lunghi capelli setosi o i semi di pioppi, salici e Willow-erbe, facilitare la dispersione dei semi da parte del vento. Frutta. Le conseguenze della fecondazione non sono confinati a ovuli;

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. Elementary botany . Botany. FRUIT 87 (ii.) Endosperm, but no perisperm: Buttercup, Violet, Mallow, Castor Oil plant, and Grasses (fig. 118). (iii.) Perisperm with scarcely a trace of endosperm : Stellaria (fig. 117). Outgrowths on Seeds.—The Violet and the Spurge have each a little lump near the micropyle (fig. 158). Many outgrowths are concerned with the scattering of the seed : for instance, the long silky hairs or the seeds of Poplars, Willows, and Willow-herbs, facilitate the dispersal of the seeds by the wind. FRUIT. The consequences of fertilisation are not confined to the ovules; the carpels, and frequently other parts, of the flower are stimulated into vigorous growth, whereas the remaining parts. Fig. iig.—Fruit (legume) of Garden Pea, wither and fall off more speedily than they would have done had fertilisation not taken place. That portion of a single flower which persists after fertilisation until the seeds are ripe is termed the fruit. There is one part of the flower which invariably persists — the ovary (or ovaries) — this remains to form a protective case round the ripening seeds. Obviously the receptacle, or a portion of it, also remains. The corolla and stamens almost always wither soon and fall, consequently they play no part in the formation of the fruit; whereas the calyx not infrequently persists. The Pea (or Bean, or Clover) may be selected as having one of the simplest of fruits. Its ovary, composed of one carpel, enlarges and becomes the familiar pea-pod (fig. 119), and constitutes the fruit inside which are the seeds. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Groom, Percy, 1865-1931. London : G. Bell

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• booksubjectbotany
• bookyear1898