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.
Division Marchantiophyta&#151Liverworts, genus Marchantia. : The thallus of the haploid gametophyte (n) grows flat on moist ground, and it is many-cells thick. Pores to permit gas exchange are in the top surface, and there are air spaces within the top zone of the thallus. Water is absorbed throughout the surface.
Verbascum blattaria. Verbascum blattaria, or moth mullein, is a flowering biennial weed belonging to the Scrophulariaceae (figwort) family. An invasive species native to Eurasia and North Africa, it has naturalized in the United States and most of Canada since its introduction. It has been declared a noxious weed by the state of Colorado.