. The agricultural species of bent grasses : Part I. -- Rhode Island bent and related grasses. Grasses. AGRICULTURAL SPECIES OF BENT GRASSES. 17. 1 2 3 4 Fig. 3.—Hulled seeds of redtop (Agrosiis palustris), enlarged, illustrating the general structure of seeds of bent grasses: 1, Back of the lemma; a, the keel vein; bb, the marginal veins; c, the callus. 2 and 3, The opposite side of the seed; d, the palet, not -wrinkled and covering the grain; e, the palet, -wrinkled and shorter than the grain. 4, Back of a lemma having an awn (f) and intermediate veins {gg). DISTINGUISHING THE SEEDS. In cons
. The agricultural species of bent grasses : Part I. -- Rhode Island bent and related grasses. Grasses. AGRICULTURAL SPECIES OF BENT GRASSES. 17. 1 2 3 4 Fig. 3.—Hulled seeds of redtop (Agrosiis palustris), enlarged, illustrating the general structure of seeds of bent grasses: 1, Back of the lemma; a, the keel vein; bb, the marginal veins; c, the callus. 2 and 3, The opposite side of the seed; d, the palet, not -wrinkled and covering the grain; e, the palet, -wrinkled and shorter than the grain. 4, Back of a lemma having an awn (f) and intermediate veins {gg). DISTINGUISHING THE SEEDS. In consequence of the close relationship existing between redtop and the other bent grasses, their seeds are very similar in appearance and are readily mistaken, one kind for another, unless they are examined critically with the aid of a low-power compound microscope or a high-power hand lens. The distinguish- ing characters of the minute seeds of redtop and other bent grasses which are of practical yalue in recogniz- ing the species are found in the seeds when freed from the outer enyelop- ing chaff (fig. 3). This chaff (fig. 4) readily separates from well- matured seeds. In immature seeds the chaffy scales tend to cling to each other and to the inclosed seed. An unnecessary proportion of chaff usually constitutes a considerable part of the bulk of Khode Island bent, colonial bent, and South German mixed bent seed. Domestic redtop is sold with the chaff present as "chaffy" redtop and free of the chaff as ''fancy," "hulled," or "recleaned" redtop. An opinion on the kind of seed found in a giyen sample and its probable source is based upon (1) the structural characters of the seed, which show its kind, and (2) the impurities found in the sample, such as other grass seeds, weed seeds, and chaff, which usually indicate the source of Please note that these images are extracted from scanned page images that may have been digitally enhanced
Size: 1823px × 1370px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorpi, bookcentury1900, bookdecade1910, booksubjectgrasses
