. Bulletin. Agriculture. II. DESCRIPTIONS OF THE SEEDS OF THE COMMER- CIAL BLUEGRASSES AND THEIR IMPURITIES. By F. H. HiLLMAN, Assistant Botanist, Seed Laboratory. THE BLUEGRASSES. The "seeds" of the species of Poa, or the bhiegrasses, are the ripened florets or individual parts o'f the smaller clusters, or spikelets, of the general floral system of the plant. The number of florets in each spikelet varies from two to nine in the different kinds of Poa commonly found in commerce. There is some variation in the num- ber of florets in the spikelets of each species. The florets separate
. Bulletin. Agriculture. II. DESCRIPTIONS OF THE SEEDS OF THE COMMER- CIAL BLUEGRASSES AND THEIR IMPURITIES. By F. H. HiLLMAN, Assistant Botanist, Seed Laboratory. THE BLUEGRASSES. The "seeds" of the species of Poa, or the bhiegrasses, are the ripened florets or individual parts o'f the smaller clusters, or spikelets, of the general floral system of the plant. The number of florets in each spikelet varies from two to nine in the different kinds of Poa commonly found in commerce. There is some variation in the num- ber of florets in the spikelets of each species. The florets separate readily at maturity, and well-cleaned samples of seed contain few whole or partial spikelets. A complete, mature spikelet embraces, besides its several florets, a pair of chafl'y scales, termed empty glumes, between which the florets, or at least the lower ones, rest. The empty glumes, while somewhat. 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 United States. Bureau of Plant Industry. Washington : G. P. O.
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