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.
Itâs one of the oldest forms of wheat, its cultivation dating back 10,000 years. It hit the US market in the late 19th century, predominantly grown in North Dakota and Montana. Now itâs popping up in New York and Pennsylvania, a truly locally grown version available at Greenmarket in New York City.