. Bulletin of the Department of Agriculture. Agriculture; Agriculture. GENERA OF GRASSES OF THE U'NITED STATES. 67 Tj'pe species: Dactylis glomerata L. Dactylis L., Sp. PL 71, 1753; Gen. PL, eel, 5, 32. 1754. Linnaeus describes two species, D. ci/nosvroides from Virginia, and D. glomerata from Europe. The latter species being described in his flora of Sweden is chosen as the type. Dactylis glomerata^ orchard grass (PL YIII; fig. 28), is a well-known meadow and pasture grass, cultivated in the humid region of the United States. It is a rather coarse, erect, perennial bunch-grass, soon form
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. GENERA OF GRASSES OF THE U'NITED STATES. 67 Tj'pe species: Dactylis glomerata L. Dactylis L., Sp. PL 71, 1753; Gen. PL, eel, 5, 32. 1754. Linnaeus describes two species, D. ci/nosvroides from Virginia, and D. glomerata from Europe. The latter species being described in his flora of Sweden is chosen as the type. Dactylis glomerata^ orchard grass (PL YIII; fig. 28), is a well-known meadow and pasture grass, cultivated in the humid region of the United States. It is a rather coarse, erect, perennial bunch-grass, soon forming- large tussocks, with culms 2 to 4 feet tall, flat blades as much as one- third of an inch wide, panicles 3 to 8 inches long, with a few stiff branches, spreading in flower, appressed in fruit. In England this is called cocksfoot grass. Orchard grass is recommended for shaded situations, as it withstands shade better than our other meadow grasses. 22. Cynostjbus L. Spikelets of two kinds, sterile and fertile together, the fertile sessile, nearly covered b}'^ the short-pediceled sterile one, these pairs imbricate in a dense one-sided spikelike panicle; sterile spikelets consisting of two glumes and several narrow, acumi- nate, 1-nerved lemmas on a continu- ous rachilla; fertile spikelets 2 or 3 flowered, the glumes narrow, the lemmas broader, rounded on the back, awn-tipped, the rachilla disarticulat- ing above the glumes. Species four, in the Mediterranean region; one occasionally cultivated in the United States and sparingly es- caped into places. Type Kpecies: C]/wjsurux crifstntus L. CynoKurus L., Sp. PL 72, 1753; Gen, PI.,. Fio. 29.âCrostotl dog'K-tail grass, CynoanruH cristntufi. Plant, X I i ferlllu Hplkclol auJ floret, X 5. ed. 5, 33. 1754. Llniucus describes nine species. Tlie first species, C. crUtatuH, is choHen as tlie type because it is an eco- nomic Hpeci(?s and is one of tlinse species descrii»cd jn Ids flora of Swcdoi. Of the remaining,'
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