f . ~. ' . • \~ . , <- •. ~\ . ~- ;' ~~~~i'~ Fig. 19. SEMgraphs of stomata of Nenax, Galopina, and Carpacoce.
Microphylla 55-80 x 50-60 80-95 x 40-55 43-95 x 35-65 Carpacoce scabra subsp. scabra C. spermacocea subsp. orientalis 50-90 x 32-45 55-110 x 36-44 The above survey of shapes and sizes refers to epidermal cells situated ± midway between the leaf margin and the midrib; the epidermal cells above and below the midrib are frequently, as depicted for A. esterhuysenianum (Fig. 20 f), much elongated and ± rectangular. The thickness of the upper and lower epidermal cells of a leaf differs considerably between Anthospermum, Galopina and Nenax (cf.