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.
Several dozen species of plants are endemic to the Ozarks, meaning they live nowhere else in the world. Plus, several globally rare plants, as will as many that are rare in Missouri, can be seen in the Ozarks. If you are just starting out, a good field guide, such as âMissouri Wildflowers,â is a must.