. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 106 BULLETIN 112, U. S. DEPARTMENT OF AGRICULTURE. appearing like halves of a single split glume; lemma lying next to the axis, smaller than the glumes, hyaline, keeled, scarcely more than 1-nerved; palea a little shorter than the lemma, hyaline, 2-nerved. Low annuals, with cylindric spikes. Species four, in the Eastern Hemisphere, one introduced into the United States. Type species: Rottboellia pannonica Host. Pholiuriis Trin., Fund. Agrost. 131. 1820. Based on a single species, Rott- boellia pannonica Host. This spec
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 106 BULLETIN 112, U. S. DEPARTMENT OF AGRICULTURE. appearing like halves of a single split glume; lemma lying next to the axis, smaller than the glumes, hyaline, keeled, scarcely more than 1-nerved; palea a little shorter than the lemma, hyaline, 2-nerved. Low annuals, with cylindric spikes. Species four, in the Eastern Hemisphere, one introduced into the United States. Type species: Rottboellia pannonica Host. Pholiuriis Trin., Fund. Agrost. 131. 1820. Based on a single species, Rott- boellia pannonica Host. This species lias 2-flowered spikelets. Lepiurus Dumort., Obs. Gram. Beige 140, pi. 15, f. 57. 1823. A single species based on " Rottbolia incurvata ; flls. The species of Pholiurus have been referred by most recent authors to Lepturus, the type of which was, by the same authors, referred to Monerma. Our species, Pholiurus incurvatus (L). Hitchc. {Aegilops iTicurvata L.,^ Lep- turus filiforTrds (Roth.) Trin.) (fig. 54), has 1-flowered spikelets. It is intro- duced alonsr the borders of salt marshes. Fig. 54.—Pholiurus incurvatus. Plant, X I ; spikelet with a joint of the rachis, X 5; spikelet, front view, X 5. from Maryland to Virginia and from Marin County to San Diego, Calif. It has no economic value. 4. AVENEAE, THE OAT TRIBE. 44. KoELEEiA Pers. Spikelets 2 to 4 flowered, compressed, the rachilla disarticulating above the glumes and between the florets, prolonged beyond the per- fect florets as a slender bristle or bearing a reduced or sterile floret at the tip; glumes usually about equal in length but unequal in shape, the lower narrow and sometimes shorter, 1-nerved, the upper some- what broader above the middle, wider than the lower, 3 to 5 nerved; 1 Sp. PI. ed. 2, 2: 1490. 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 perfect
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