Manual of the Grasses of the United StatesU.S. Government Printing Office, 1950 - 1051 pages |
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Manual of the Grasses of the United States Albert Spear Hitchcock,Agnes Chase Affichage du livre entier - 1951 |
Expressions et termes fréquents
3-nerved Acad acuminate Agropyron Agrost Amer Andropogon appressed Aristida Arizona ascending awnless Based on Agrostis Based on Panicum Based on Poa Beauv blades flat branches Bromus Calamagrostis Calif California callus Carolina Club Bul Contrib culms culms erect densely Elymus Eragrostis Fernald Festuca FIGURE flexuous floret Florida Fourn glabrous glumes glumes and floret Gram grass hairs Herb Hitchc involute Jour keel Kunth lemma ligule lower Melica Merr Mexico Michx Muhl Muhlenbergia Nash Nees nerves nodes Nutt palea panicle panicle narrow Panicum Paspalum pedicels Perennial pilose Plant pubescent racemes rachilla rachis rhizomes Rhodora Rottboellia Rydb scabrous Schult Scribn second glume slender spike spikelets Sporobolus spreading Spreng sterile lemma Steud Stipa synonym tall Texas Torr Torrey Bot Trin tufted Type species U. S. Dept U. S. Natl usually Vasey views of spikelet villous wide Willd
Fréquemment cités
Page 56 - Spikelets several- to many-flowered, the rachilla disarticulating above the glumes and between the florets; glumes unequal, acute...
Page 302 - Spikelets 2 to several flowered, the rachilla bearded, disarticulating above the glumes and between the florets ; glumes about equal, membranaceous or papery, severaL-nerved, longer than the lower floret, usually exceeding the upper floret; lemmas indurate, except toward the summit, 5 to...
Page 169 - Spikelets several- to many-flowered, linear, the rachilla disarticulating above the glumes and between the florets; glumes unequal...
Page 19 - Spikelets 2- to several-flowered in open or contracted panicles, or rarely in racemes (solitary in Danthonia unispicata) , glumes usually as long as or longer than the first lemma, commonly longer than all the florets; lemmas usually awned from the back or from between the teeth of a bifid apex, the awn usually bent, often twisted, the callus and rachilla joints usually villous.
Page 57 - Spikelets 2 to several flowered, the rachilla disarticulating above the glumes and between the florets, the uppermost floret reduced or rudimentary; glumes acute, keeled, somewhat unequal, the first 1 Beitr.
Page 140 - Spikelets few to many-flowered, the florets usually closely imbricate, the rachilla disarticulating above the glumes and between the florets, or continuous, the lemmas deciduous, the paleas persistent ; glumes somewhat unequal...
Page 13 - Flowers perfect (rarely unisexual), small, with no distinct perianth, arranged in spikelets consisting of a shortened axis (rachilla) and 2 to many 2-ranked bracts, the lowest two being empty (the glumes, rarely one or both of these obsolete), the one or more succeeding ones (lemmas) bearing in their axils a single flower, and, between the flower and the rachilla, a second 2-nerved bract (the palea) , the lemma, palea, and flower together constituting the floret; stamens 1 to 6, usually 3, with very...
Page 184 - Spikelets of two kinds, in fascicles, the terminal one of each fascicle fertile, the others sterile; fertile spikelet, with 1 perfect floret, the rachilla produced beyond the floret, bearing a small awned empty lemma or reduced to an awn; glumes narrow, acuminate or short-awned, 1-nerved; lemma broader, raised on a slender stipe, scarcely nerved, bearing just below the apex a delicate straight awn; sterile spikelets linear, 1 to 3 in each...
Page 277 - Spikelets 1-flowered, embedded in the hard, cylindric, articulate rachis, placed edgewise thereto, the first glume wanting except on the terminal spikelet, the second glume closing the cavity of the rachis and flush with the surface, indurate, nerved, acuminate, longer than the joint of the rachis ; lemma lying next the rachis, hyaline, shorter than the glume, 3-nerved ; palea hyaline, 2-nerved, a little shorter than the lemma; rachilla not disjointing, the spikelet falling entire, attached to its...