. Bulletin. 1901-13. Agriculture; Agriculture. DESCRIPTIONS OF SPECIES. 29. Texas bluegrass seed in commerce is unrubbed, and as the silky pubescence and web are very persistent they are always present. The hairs are so long and copious that the seeds cling in loosely matted, woolly bunches, and thus are easily distinguished from all the other commercial Poas. (Fig. 10.) Poa annua L. ANNUA! MEADOW GRASS. Spikelets 3-5 flowered; florets li-3 mm. long, ovate or ovate-lanceolate and relatively robust, strongly keeled and arched at the back, more or less densely pubescent, light brown or dark brow
. Bulletin. 1901-13. Agriculture; Agriculture. DESCRIPTIONS OF SPECIES. 29. Texas bluegrass seed in commerce is unrubbed, and as the silky pubescence and web are very persistent they are always present. The hairs are so long and copious that the seeds cling in loosely matted, woolly bunches, and thus are easily distinguished from all the other commercial Poas. (Fig. 10.) Poa annua L. ANNUA! MEADOW GRASS. Spikelets 3-5 flowered; florets li-3 mm. long, ovate or ovate-lanceolate and relatively robust, strongly keeled and arched at the back, more or less densely pubescent, light brown or dark brown and often purplish or yellowish: margins of the glume very narrowly infolded below the middle, thin and broadly hyaline above the middle in the lower florets, flaring, gaping, or infolded at the apex; inter- mediate veins usually distinct as narrow ridges extending from the base to the margin of the apex, glabrous or pubescent; marginal veins and keel densely soft-pubescent below the middle; surface between the veins some- times more or less pubescent at the base; web wanting; palea somewhat shorter than the glume, except in the terminal floret; keels of the palea coarse and prominent, mostly exposed, usually arched forward and exposed to side view in florets having a well-developed grain, often contracted toward the rachilla segment at the base, silky pubescent from near the base nearly to the apex; rachilla segment glabrous, from one-fourth to one-third the length of the glume, aborted floret of the sterile rachilla segment minute; grain 1-1J mm. long, robust, distinctly granular, keeled and grooved, slightly translucent. (Fig. 11.) The seed of Poa annua is not in the trade and is not apt to become mixed with the commercial bluegrass seeds. It may be readily distin- guished from the common commercial species of Poa by its abundant Fig. 10.—A cluster of Texas bluegrass seeds matted by the webby Please note that these images are extracted from scanned page images t
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