. The book of wheat : an economic history and practical manual of the wheat industry. d Buffalo Grass Hordese : Wheat-Barley-Rye-English Rye-GrassBambusea;: Bamboo Minn. Bui. 62, p. 392. THE WHEAT GRAIN AND PLANT 3 wheat. This is the hypothesis that accounts for most of thefacts involved. AH of the grass family, Gramineae, are easilydistinguished by having only one seed leaf, and for this rea-son they are known as monocotyledons. The wild animal grasses, Aegilops, found in such abundancein southern Europe, and resembling true wheat in every pointexcept in size of grain, are considered as the n
. The book of wheat : an economic history and practical manual of the wheat industry. d Buffalo Grass Hordese : Wheat-Barley-Rye-English Rye-GrassBambusea;: Bamboo Minn. Bui. 62, p. 392. THE WHEAT GRAIN AND PLANT 3 wheat. This is the hypothesis that accounts for most of thefacts involved. AH of the grass family, Gramineae, are easilydistinguished by having only one seed leaf, and for this rea-son they are known as monocotyledons. The wild animal grasses, Aegilops, found in such abundancein southern Europe, and resembling true wheat in every pointexcept in size of grain, are considered as the nearest kin towheat. Efforts have been made to develop wheat from ovata,tlie most topical species. Fabre of Agde, Fi-ance, claimed thatin 1838 he began to improve this plant by selection, and thatby 1846 he had obtained a very fair sample of wheat. Hisresults have not been supported by other conclusive experi-ments, and scientists generally have not accej^ted them. Therewas doubtless cross-fertilization. The accompanying figure represents different stages in theevolution of DEVELOPMENT OF THE WHEAT PLANT Tlie above sketch from a photograph shows: (1) ^gilopsovata, a small dwarfedspecimen, but one gram of wheat in each head, found in Southern Europe;(2) The same species better grown and developed; (3) Tritinim spelta, thecultivated spelt of Europe; (4) THfio/w PotowCT*wij Polish wlieat or giantrye; (5) Head of Nebraska wheat. While this is an mstructive comparison,it is very questionable whether ITo. 5 could be developed from No. lin a rea-sonable number of years. » Minn. Bui. 62, p. 81. 4 THE BOOK OF WHEAT. The results of recent investigations have shown that improve-ment by selection is relatively a slow process DISTRIBUTION. Longitudinal.—The migration of wheat has necessarily beenclosely connected with the migration of peoples, and especiallywith those of Europe. Consequently its general direction ofspreading has been westward, though it is claimed that itspread e
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