Fig. 3 in Croton maranonensis: a new species of Euphorbiaceae from the tropical inter-Andean dry valleys

Fig. 3. Leaf anatomy features of Croton maranonensis sp. nov., based on diaphanization of leaf blade (A); scanning electron microscopy from the adaxial (B) and abaxial (C) surface; and transverse sections (D–G). A. Cells with straight contour and paracytic stomata (st) on the adaxial surface. B. Epidermal appendages of simple (s) and porrect (p) stellate trichomes (tr) with a variable number of radial cells. C. Porrect stellate trichomes and knob-like glandular trichomes (g). D. Biconvex midrib and secretory idioblast (id) at the base of the stellate trichome in detail. E. Simple trichomes connected to sclereids crossing the mesophyll (arrow). F. Middle region of the blade with dorsiventral mesophyll and knob-like glandular trichome (g) on the abaxial side; note druses (arrow head only) dispersed on the mesophyll and sclereid (arrow). G. Knob-like glandular trichome on the adaxial side. Abbreviations: co: collenchyma; db: dorsal bundles; ep: epidermal cells; g: glandular trichome; id: idioblast; p: porrect ray; ph: phloem; pp: palisade parenchyma; s: simple trichome; sp: spongy parenchyma; st: stoma; tr: trichome; x: xylem. Scale bars: A–C = 20 µm; D = 100 µm (detail = 20 µm); E–G = 50 µm.