sept11 - (bio-indicators ecological associates-switchgrass...

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Sept. 11 th : -little bluestem turns blood red in fall when matting -sand sagebrush grows in sandy soils -big bluestem: is widely distributed over the plains—state grass of Illinois 2 Varieties of bluestem 1. big bluestem w/ 3 inflorescence = andropogon gerardii (grows in heavy soils) 2. sand bluestem w/ 2 inflorescence = andropogon hallii (sandy soils) -different populations of the same species locally adapt to their environment—ecotype (same species in different environments look different) -plants that are popular in places can help you figure out other plants growing in that area
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Unformatted text preview: (bio-indicators, ecological associates) -switchgrass: spikelets on far end of the branches w/ lots of hair at the collar-big bluestem, little bluestem, Indian grass & switchgrass (hallmark species of the Great Plains) **in order from growing in driest soil wettest soil -green sprangletop: has alternating branches (used to re-seed a hazardous waste disposal sight in TX)-western ragweed: has rhizomes; comes in after fires for about 2 growing seasons; common in burn areas because of rhizomes...
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