A text-book of grasses with especial reference to the economic species of the United States . of the northern United States. FESTUCEM 229 253. Other economic species of Poa.—Comparedwith Kentucky blue-grass, the other species of Poa are ofslight importance, although Can-ada blue-grass attains some im-portance locally (Par. 35). Of theother species 2 are advertised byseedsmen and are occasionally usedin mixtures. Canada blue-grass {Poa com-pressa L.).—Culms wiry, flattened,with numerous creeping rhizomes,not tufted; panicles narrow, thebranches in pairs. This resemblesP. pratensis but is bluish
A text-book of grasses with especial reference to the economic species of the United States . of the northern United States. FESTUCEM 229 253. Other economic species of Poa.—Comparedwith Kentucky blue-grass, the other species of Poa are ofslight importance, although Can-ada blue-grass attains some im-portance locally (Par. 35). Of theother species 2 are advertised byseedsmen and are occasionally usedin mixtures. Canada blue-grass {Poa com-pressa L.).—Culms wiry, flattened,with numerous creeping rhizomes,not tufted; panicles narrow, thebranches in pairs. This resemblesP. pratensis but is bluish greenrather than dark green. Cultivatedas a pasture-grass. Called alsowire-grass and flat-stem. Rough - stalked meadow - grass{Poa trivialis L.).—This resemblesP. pratensis but differs in theabsence of rhizomes and in havingscabrous sheaths and a long cultivated as a meadow-grass. Fowl meadow-grass {Poa trifloraGilib.; P. serotina Ehrh.).—Culms1 to 4 feet high, tufted but with-out rhizomes; sheaths smooth; Fig. 54. Poa pratensis. Plant, XH; spikeletand floret, 230 A TEXT-BOOK OF GRASSES panicles large and open, 4 to 12 inches long. Sometimescultivated as a meadow-grass. Annual blue-grass (Poa annua L.).—A low-spreadingtufted annual with soft light green foliage and smallpanicles resembling those of P. pratensis. A native ofEurope, now a common weed throughout the warmer por-tions of the United States. In the eastern states, it is atroublesome weed in lawns, because, though it makes agood showing in the spring, it dies out later, leaving barespots. Poa arachnifera Torr. Texas blue-grass. A smooth rhizome-bearing, dioecious perennial 1 to 2 feet high, with contracted pani-cles 2 to 4 inches long; the staminate spikelets glabrous, the lemmasof the pistillate spikelets villous on the keel and marginal nerves,provided at base with a copious tuft of woolly hairs. A native ofTexas, where it is a good but rather local range-grass. This specieshas been re
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Keywords: ., bookauthorhi, bookcentury1900, bookdecade1910, booksubjectgrasses
