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We eat the root of the Solanum tuberosum and throw away its fruit; we eat the fruit of the Solanum Lycopersicum and throw away its root. Nothing but vulgar experience has taught us to reject the potato ball and cook the tomato. So of most of our remedies.
It was a progress northward.... This plant, the Peronospora infestans, will only grow on the Solanum tuberosum, that is, the cultivated potato.... Just as plants of higher organization choose their soils, some growing in the water and some on land, so the Peronospora infestans chooses its host plant; and its soil is this species, the Solatium tuberosum.
Chili is considered by naturalists as the native country of that valuable esculent the potato, or Solanun tuberosum, which is known there by the names of papa and pogny. It is found indeed wild all over the country; but those wild plants, named maglia, produce only small roots of a bitterish taste. It is distinguished into two species, and more than thirty varieties are cultivated with much care.
We eat the root of the Solanum tuberosum and throw away its fruit; we eat the fruit of the Solanum Lycopersicum and throw away its root. Nothing but vulgar experience has taught us to reject the potato ball and cook the tomato. So of most of our remedies.
We have seen in this genus a gradation from species such as T. tricolorum, which have extremely sensitive petioles, and internodes which rapidly revolve and spirally twine up a support, to other species such as T. elegans and T. tuberosum, the petioles of which are much less sensitive, and the internodes of which have very feeble revolving powers and cannot spirally twine round a support, to this last species, which has entirely lost or never acquired these faculties.
A young petiole, when rubbed, became slightly curved in 17 m.; and afterwards much more so. It was nearly straight again in 8 hrs. Tropaeolum tuberosum. On a plant nine inches in height, the internodes did not move at all; but on an older plant they moved irregularly and made small imperfect ovals. These movements could be detected only by being traced on a bell-glass placed over the plant.
The petioles which have clasped some object become much more stiff, hard, and polished than those which have failed in this their proper function. TROPAEOLUM. I observed T. tricolorum, T. azureum, T. pentaphyllum, T. peregrinum, T. elegans, T. tuberosum, and a dwarf variety of, as I believe, T. minus. Tropaeolum tricolorum, var. grandiflorum.
Supposing the potato which we now grow, the Solanum tuberosum of botanists, to have come to Ireland in 1586, the usually accepted date, it does not seem to have been in anything like general favour or cultivation one hundred and forty years later, at least in the richer and more important districts of the country.
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