Fig. 2
From: Comparative study of the photosynthetic efficiency and leaf structure of four Cotoneaster species
Histology of Cotoneaster roseus (CR), C. hissaricus (CHi), C. nebrodensis (CN), and C. hsingshangensis (CHs) leaves: a, c, e, g cross-section through the leaf blade: upper epidermis (Eu), palisade mesophyll (P), spongy mesophyll (S), vascular bundle (white arrow), calcium oxalate crystal (black arrow), lower epidermis (El); b, d, f, h cross-section through the midrib: collenchyma (black arrow); sclerenchyma (white arrow), vascular bundle (V), xylem (X); a-g LM, h FM. Scale bars: a, c, e, g − 25 μm; b, d, f, h – 50 μm.
