papillae and two types of trichome (unicellular and bicellular), and stomata cells were observed on the adaxial
(Figure 2(H) and Figure 2(M)) and abaxial sides of the leaf blade (Figure 2(I) and Figure 2(N)) and the abaxial
side of the sheath (Figure 2(K) and Figure 2(P)). In contrast, the adaxial side of P5 and P6 leaf sheaths had
no papillae or trichomes (Figure 2(L) and Figure 2(Q)). However, fully developed stomata were present and
the epidermal cells were elongated, indicating that the cells of the adaxial epidermis of P5 and P6 leaf sheaths
were mature. The epidermis of the boundary of both leaf blade and sheath of P5 and P6 showed rectangle epidermal
cells without any differentiated cells (Figure 2(J) and Figure 2(O)), indicating that the boundary