div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentabout-this-poster-oak-savannas-savannas-are-known-for-their-scattered-trees-ahtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: iowadotgovAbout this-poster: OAK SAVANNAS Savannas are known for their scattered trees — Often large wide-crowned oaks — that tower above a prairie groundcover These oak openings loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220423235f0d10dd7e708231d438825fhtml5thumbnails1jpg width=140 height=200 divdiv