. A class-book of botany, designed for colleges, academies, and other seminaries ... Illustrated by a flora of the northern, middle, and western states; particularly of the United States north of the Capitol, lat. 38 3/4. these pitchers areevidently formed by the very deep channeling of the petiole, and the unitingtogether of the involute edges of its winged margin so as to form a completevase, with a broad expansion at the top, which may be regarded as the true leaf. 94 THE LEAF. The ascidia thus formed are always full of water, in which insects are drowned,being prevented from escaping by th
. A class-book of botany, designed for colleges, academies, and other seminaries ... Illustrated by a flora of the northern, middle, and western states; particularly of the United States north of the Capitol, lat. 38 3/4. these pitchers areevidently formed by the very deep channeling of the petiole, and the unitingtogether of the involute edges of its winged margin so as to form a completevase, with a broad expansion at the top, which may be regarded as the true leaf. 94 THE LEAF. The ascidia thus formed are always full of water, in which insects are drowned,being prevented from escaping by the deflexed hairs at the mouth. 246. The Nepenthes is a native of the East Indies. Its proper leaves are ses-sile and lanceolate. The midvein extends beyond the apex, like a tendiil, to thelength of six or eight inches. The extremity of tliis tendiil is inflated into a hol-low vessel similar to a pitcher, and usually contains about half a pint of purewater. It is furnished -s^-ith a leafy lid, connected to it by a ligament which ex-pands or contracts according to the state of the atmosphere, so that the cup isopen in damp weather to receive moisture from the air, and closed in dry weatherto prevent its FIG. 34. — 1, Sarraceiiia purpurea; 2, Nepenthes distillatoria ; 3, Dischidia Raf- 247. Another wonderful provision of this kind is observed in a plant growingin the forests of India, called Dischidia. It is a t\^^ning plant, ascending the talltrees to the distance of 100 feet from its roots, and destitute of leaves except nearits top. These cannot, therefore, it would seem, derive much nourishment fromthe earth. The pitchers seem fonned of a leaf with its edges rolled towards eachother, and adherent, and its upper end, or mouth, is open to receive whatevermoisture may descend into it, of which there is always a considerable the greatest man-el in its structure is yet to be described. Several bundlesof absorbent fibres, resembling roo
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectbotany, bookyear1848
