. The botany of crop plants : a text and reference book. Botany, Economic. 138 BOTANY OF CROP PLANTS is exposed, for by so doing, a point of attack for molds is furnished. The palet is about the same length as the lemma, and bears two ridges. The styles are short, and the two lodicules are conspicuous and vary in the different types. Opening of Flower and Pollination.—The blooming of a spike begins slightly above the middle and pro- ceeds from this point upward and downward. The middle flowers of a triplet come to maturity earlier than the laterals. The duration of blooming varies. Three to fo
. The botany of crop plants : a text and reference book. Botany, Economic. 138 BOTANY OF CROP PLANTS is exposed, for by so doing, a point of attack for molds is furnished. The palet is about the same length as the lemma, and bears two ridges. The styles are short, and the two lodicules are conspicuous and vary in the different types. Opening of Flower and Pollination.—The blooming of a spike begins slightly above the middle and pro- ceeds from this point upward and downward. The middle flowers of a triplet come to maturity earlier than the laterals. The duration of blooming varies. Three to four days is a good average for a single spike, and seven to nine days for all spikes of a plant. The glumes of a flower remain open from twenty to thirty minutes. This period depends upon weather conditions. In two-rowed nodding barley, the lateral flowers bloom with open glumes, while the middle ones seldom open. Four-rowed barley almost always blooms with open flowers, both middle and side. In two-rowed erect barley, six-rowed barley and peacock barley, the flowers bloom with closed glumes. It is claimed that, in such cases, the lodicules are too. lemma —starchij enSospermi Pic. si.—A, barley grain with the "hull;" B, with "hull" removed; C, grain in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Robbins, Wilfred William, 1884-1952. Philadelphia : P. Blakiston's Son
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectbotanyeconomic
