Lab 5 - Lab 5 Desert Grassland silver bluestem Andropogoneae a b c d Bothriochloa laguroides PNW Poaceae spikelets paired covered with white hairs

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Lab 5 - Desert Grassland silver bluestem Bothriochloa laguroides PNW Poaceae/ Andropogoneae a. spikelets paired, covered with white hairs b. a single awn comes from tip of lemma c. spraggly growth, bottom of plant reddish-purple d. a low value perennial midgrass of southern half of U.S. tanglehead Heteropogon contortus PNW Poaceae/ Andropogoneae a. sheaths compressed-keeled b. spike-like raceme , sessile spikelets almost hidden c. awns 5-12 cm long, pubescent, often bent and tangled, dark brown to black , "contortus" = contorted d. blunt lower leaf tips black grama Bouteloua eriopoda PNW Poaceae/ Cynodonteae a. palatable species in the desert grasslands b. internodes are densely pubescent, sheaths glabrous (hairy, slick, hairy, slick) c. note tuft of hairs where comb originates d. spreads by tillers, some stolons hairy grama Bouteloua hirsuta PNW Poaceae/ Cynodonteae a. usually 2 comb-like inflorescence branches, spikelets with black glands b. rachis extends beyond last spikelet c. leaves very hairy (hirsute) d. common on sands, rocky soils, dry uplands, and disturbed hardlands in mesic types Rothrock's grama Bouteloua rothrockii PNW Poaceae/ Cynodonteae a. 4 to 12 pectinate branches ; 4 to 12 spikelets on each branch b. leaves not densely basal as on blue grama c. found on dry hillsides, mesas, and other sites in southwest curly mesquite Hilaria belangeri PNW Poaceae/ Cynodonteae a. fan-shaped spikelets whorled around a zig-zag rachis. (like tobosagrass) b. stolons with hairy nodes c. narrow blades with sparse hairs
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This note was uploaded on 11/14/2010 for the course NRM 3501 taught by Professor Wester during the Fall '09 term at Texas Tech.

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Lab 5 - Lab 5 Desert Grassland silver bluestem Andropogoneae a b c d Bothriochloa laguroides PNW Poaceae spikelets paired covered with white hairs

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