. Bulletin. Agriculture. 7 3 % i. Fig. 7.—.Seeds of wood meadow grass {Poa nemoralis): a-c, back views; d and e, side views; /-/, front views; j, a terminal floret. Commercial wood meadow grass seed is not rubbed in preparation for market, and therefore possesses much of its rather persistent and prominent silky pubescence, and the thin tips of the florets are mostly uninjured. The pubescence of the rachilla segment is persistent and present in most of the seeds of all pure samples of this species. It afl'ords the most marked characteristic by which the seeds of P. nemo- ralls may be distingui
. Bulletin. Agriculture. 7 3 % i. Fig. 7.—.Seeds of wood meadow grass {Poa nemoralis): a-c, back views; d and e, side views; /-/, front views; j, a terminal floret. Commercial wood meadow grass seed is not rubbed in preparation for market, and therefore possesses much of its rather persistent and prominent silky pubescence, and the thin tips of the florets are mostly uninjured. The pubescence of the rachilla segment is persistent and present in most of the seeds of all pure samples of this species. It afl'ords the most marked characteristic by which the seeds of P. nemo- ralls may be distinguished from those of other commercial species of Poa. The conspicuously longer rachilla segments of the terminal florets are noticeably abundant in samples of this species, since these florets constitute from one-third to one-half of all the seed. The abundance of the long rachilla segments is helpful in distinguishing these seeds from those of other Poas. Commercial seed of P. nemoralis is apt to be very much adulterated with other species of Poa. Of a number of samples examined less than half were true to name. One was nearly pure Canada bluegrass seed, and the rest consisted in part of one or all of the following species: P. j^ratensis, P. compressa, and P. trivially. The following comparison of characters should render it compara- tively easj'^ to distinguish the seeds of P. nemoralh from those of the other . 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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