The criterion level, often abbreviated as Lc, is the steady noise level permitted for a full eight-hour work shift. This is 85 dB(A) in most jurisdictions, but it is 90 dB(A) in Quebec and 87 dB(A) for organizations that follow the Canadian federal noise regulations.
Royal Catchfly (Silene regia) This striking plant may grow as high as five feet, with bright red flowers. It flowers from May through September, and can be seen in remnant prairies and open woods. In Missouri, it is known only in the Ozarks.
Written by Sean Dixon on August 19, 2013. Crops grown like those sown by Native Americans 1,000 years ago are growing again at Smallin Civil War Cave just south of Springfield. Staff archeologist Eric Fuller planted corn, sunflowers, squash and other plants from seeds that have not been manipulated since they were originally grown by the Osage tribes and others that inhabited the area.