Ancient Plants / Being a Simple Account of the past Vegetation of the Earth and of the Recent Important Discoveries Made in This Realm of Nature

by Marie Carmichael Stopes

Epidermal.

Fig. 21

Epidermis.—Protecting layer or skin. Cells with outer wall thickened in many cases ([fig. 21], a and b). Compare fossil epidermis in [fig. 34], e.

Fig. 22

Hairs.—Extensions of epidermis cells. Single cells, or complex, as [fig. 22], h, where e is epidermis and p parenchyma. Compare fossil hairs in figs. [79] and [120].

Fig. 23

Stomates.—Breathing pores in the epidermis. Seen in surface view as two-lipped structures ([fig. 23]). s, Stomates; e, epidermis cells. Compare fossil stomates in [fig. 8].