Note 599 — ARTICHOKE.
William Johnston translation
It was said, that if the corners of the seeds were bruised, no prickles would be produced. See Geopon. lib. xii. cap. 39. [It is a well-known physiological fact in botany, that many plants which are naturally spinous, when cultivated in gardens or rich soil, become unarmed. The production of spines seems to arise from an imperfect development of the growing point of a plant; when this development is increased by the greater supply of nutriment, the spines disappear, their places being supplied by a branch having leaves. We have instances of this in the apple, pear, &c., which are naturally spinous.]