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Updated: May 31, 2025
"This areola, or nucleus of the cell as perhaps it might be termed, is not confined to the epidermis, being also found, not only in the pubescence of the surface, particularly when jointed, as in cypripedium, but in many cases in the parenchyma or internal cells of the tissue, especially when these are free from the deposition of granular matter.
This disease has never ben communicated to an individual from one infected by means of the perspirable matter; this, therefore, is a proof that the contagious part of the disease is not of a volatile nature. It does not only exist in the saliva and the mucus of the mouth, but likewise in the blood and the parenchyma of the salivary glands; but not in the pulpy substance of the nerves.
Flowers are but colored leaves, fruits but ripe ones. The edible part of most fruits is, as the physiologist says, "the parenchyma or fleshy tissue of the leaf" of which they are formed.
Gail Hamilton said of her squashes: "They appeared above-ground, large-lobed and vigorous. Large and vigorous appeared the bugs, all gleaming in green and gold, like the wolf on the fold, and stopped up all the stomata and ate up all the parenchyma, till my squash-leaves looked as if they had grown for the sole purpose of illustrating net-veined organizations.
The fibrovascular bundles also contain soft-walled prosenchyma cells. The peri-nuclear portion consists of soft-walled parenchyma, smaller near the nuclear sheath and the epidermis, and larger about midway between, and of the same character as the cells of the pith.
Large and vigorous appeared the bugs, all gleaming in green and gold, like the wolf on the fold, and stopped up all the stomata and ate up all the parenchyma, till my squash-leaves looked as if they had grown for the sole purpose of illustrating net-veined organizations. In consternation I sought again my neighbor the Englishman. He assured me he had 'em on his, too, lots of 'em.
If from these organic syllables we proceed to form organic words, we shall find that Nature employs three principal forms; namely, Vessels, Membranes, and Parenchyma, or visceral tissue. The most complex of them can be resolved into a combination of these few simple anatomical constituents.
The Mauritia aculeata is called by the Indians juria or cauvaja; its leaves are in the form of a fan, and they bend towards the ground. At the centre of every leaf, no doubt from the effect of some disease of the parenchyma, concentric circles of alternate blue and yellow appear, the yellow prevailing towards the middle.
It would be interesting, for example, to learn what difference there would be in the quality of two wines, the grapes of which, in the once case, had been perfectly crushed, so as to cause as great a separation of the cells of the parenchyma as possible; in the other case, left, for the most part, whole, as in the case in the ordinary vintage.
The cannas, the heliconias with fine purple flowers, the costuses, and other plants of the amomum family, here attain eight or ten feet in height, and their fresh tender verdure, their silky gloss, and the extraordinary development of the parenchyma, form a striking contrast with the brown colour of the arborescent ferns, the foliage of which is delicately shaped.
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