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.
All About Zoysia. Zoysia is a particularly hardy grass that grows well in a wide range of conditions and requires far less watering and mowing than most grasses. At the same time, this tough grass creates a thick, soft carpet that feels great in bare feet. Zoysia is ideal because it actually grows differently.