Brushy Pond Natural Area is an upland marsh and swamp, habitats to rare and endangered species grass. This is an excellent example of a sinkhole pond marsh in the Lower Ozarks Section of the Ozark Natural Division. Brushy Pond contains three rare sedges, Carex alata, Carex comosa and Carex decomposita as well as the rare manna grass. All four species are known only from sinkhole ponds in Missouri. It is accessed from Hwy 19, 18 miles north of Alton.