A text-book of grasses with especial reference to the economic species of the United States . HORDED 245 long-awned. When all 3 spikelets of each group arethe barley is 6-rowed; whenonly the central spikelet isfertile the barley is 4-rowed, or commonbarley, all the spikelets arefertile but the lateral rowsof the opposite sides of thehead overlap or intermingleto form a single row. Sev-eral species of Hordeumare troublesome weeds. Ofthese may be mentioned Nutt., an annual,and H. nodosum L., a per-ennial, low short-awnedspecies found widely distrib-uted in the United States
A text-book of grasses with especial reference to the economic species of the United States . HORDED 245 long-awned. When all 3 spikelets of each group arethe barley is 6-rowed; whenonly the central spikelet isfertile the barley is 4-rowed, or commonbarley, all the spikelets arefertile but the lateral rowsof the opposite sides of thehead overlap or intermingleto form a single row. Sev-eral species of Hordeumare troublesome weeds. Ofthese may be mentioned Nutt., an annual,and H. nodosum L., a per-ennial, low short-awnedspecies found widely distrib-uted in the United States,and H. jubatum L. (squirrel-tail grass) with long-awnedsoft spikes, a perennialfound especially westward,all 3 native species. Twospecies introduced fromEurope, H. inurinum L. andH. Gussoneanum Pari., vari-ously known as fox-tail andwild barley, are commonand troublesome on thePacific coast. These are lowspreading annuals, the firstwith flattened spikes andcihate glumes, the second fertile. Fig. 62. Hordeum vulgare. Inflores-cence (head), XH; cluster of 3 spike-lets, and a single floret from the backshowing the stipiform rachilla, X2. 246 A TEXT-BOOK OF GRASSES with cylindrical spikes and several setaceous glumes. Allthe species mentioned except cultivated barley have anarticulated rachis that breaks up at maturity. Hordeum vulgare L. {H. sativum Jessen). (Fig. 62.) Cultivatedbarley. Annual; culms and leaves similar to those of wheat; auri-cles prominent, as much as 5 mm. long, glabrous; spike densely-flowered, usually 3 to 4 inches long, excluding the long awns orbeards, the rachis not disarticulating at maturity; spikelets in 3sat each joint of the rachis; glumes about }4 inch long, narrow, theupper half narrowed into an awn; lemma fusiform, about % inchlong, the upper portion narrowed into a very scabrous flat awn asmuch as 6 inches long, the rachilla of the spikelet extended behindthe floret as a short hairy or scabrous pedicel lying in the furrow ofthe palea. In mos
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Keywords: ., bookauthorhi, bookcentury1900, bookdecade1910, booksubjectgrasses
