%0 Journal Article
%A Qing-Wen Ma
%A Cheng-Sen Li
%T Epidermal Structures of Sequoia sempervirens (D. Don) Endl. (Taxodiaceae)
%D 2002
%J Taiwania
%V 47
%N 3
%P 194-202
%U https://taiwania.ntu.edu.tw/abstract/325
%X Sequoia sempervirens (D. Don) Endl. is the unique living species of genus Sequoia. Epidermal structures of S. sempervirens were reported divergently. This study focuses on the understanding of variation of the epidermis structures of S. sempervirens, based on integral leaves, rather than on leaf fragments. Epidermal cells on both upper and lower surfaces of leaves possess similar features, but their shape and size in non-stomatal areas are different from those in stomatal areas. The amount and distribution of stomata on the lower surface vary indistinctly, but obvious variations of them on the upper surface are described as four situations. Guard cells of stomata are sunken and partly blanketed with subsidiary cells. Each stoma has 4-6, but mostly 4 subsidiary cells, occasionally exceeding 6. Long axes of stomata are mostly parallel to, but sometimes oblique or perpendicular to the mid-vein.
%M doi:10.6165/tai.2002.47(3).194