Some interesting questions connected with the natural objects claim our regard in the first instance, before we proceed to investigate the spiritual significance of the parable. What are the tares? The original term does not elsewhere occur in Scripture, and in the total absence of examples for comparison, it is somewhat difficult to ascertain its precise signification. The word and the thing which it signifies have exercised the learning and ingenuity of expositors both in ancient and in modern times. On such a subject as this it is on the line of natural history rather than philology that the investigation should mainly proceed; there, from the nature of the case, surer results may be obtained. Through the increased facility of making local inquiries which has of late years been enjoyed, it is now known, and apparently with one consent acknowledged by intelligent inquirers, that the seed which the malicious neighbour sowed in order to injure the produce of the field was _Lolium temulentum_, or darnel, a kind of false wheat to which the Arabs of Palestine at this day apply a name (zowan) which bears some resemblance to (ζιζανια) the original word in the Greek text.[11] It has long narrow leaves and an upright stalk, and is indeed in all respects so like the wheat, that even an experienced eye cannot distinguish the two plants until they are in ear: the distinction then is manifest, and any one may observe it. The grains of the darnel are not so heavy as the wheat, and not so compactly set upon the stalk. They are poisonous, their specific effect both in man and in beast being nausea and giddiness. The remark of Schubert in his "Natural History," quoted by Stier, that "this is the only poisonous grass," is deeply significant in relation to the spiritual meaning of the parable; it suggests the reason why the Healer selected this plant as the symbol of sin. [11] "The Land and the Book," by Dr. Thomson. T. Nelson & Sons.