1 The sun's rays are strongest during the hours of 10 a.m. to 4 p.m. The sun's rays are also stronger at higher altitudes and lower latitudes (closer to the tropics). Reflection off water, sand, or snow can make the sun's burning rays stronger.  Sun lamps can cause severe sunburn.
Marchantia polymorpha, sometimes known as the common liverwort or umbrella liverwort, is a large liverwort with a wide distribution around the world. It is variable in appearance and has several subspecies.
Forsythia, also called Golden Bell, any member of a genus (Forsythia) of plants in the olive family (Oleaceae), containing seven species of ornamental shrubs native to eastern Europe and East Asia. In some species the yellow flowers borne along the stems appear before the leaves in early spring.