Characteristics of Reference in Classifying Fossil Plants of Genera Metasequoia and Sequoia by Epidermal Features Growth Response of Sequoia sempervirens Seedlings to N Nutrients KARYOTYPE STUDY OF METASEQUOIA GLYPTOSTROBOIDES CRITICAL NOTES ON THE ORIGINAL YEARS AND LOCALITY OF SEQUOIA SEMPERVIRENS THE PARENTS OF SEQUOIA SEMPERVIRENS (TAXODIACEAE) BASED ON MORPHOLOGY IS METASEQUOIA AN ANCESTOR OF SEQUOIA SEMPERVIRENS?