Figure 4 from: Corti E, Palchetti E, Biricolti S, Gori M, Tani C, Squillace A, Pittella A, Papini A, Falsini S (2021) Histochemical observations in Piper malgassicum (Piperaceae) with a special focus on the epidermis. Italian Botanist 12: 29-47. https://doi.org/10.3897/italianbotanist.12.70675

Figure 4 LM images of the cross-sections of P. malgassicum leaf (A–F) and stem (G, H) APAS positivity of trichomes and epidermis cells BPAS positivity of the epidermal cells and terpenic droplet below the first layer of cells C staining with FeCl3 D leaf lamina positive to Wagner staining E detail of D showing alkaloid droplets in the hypodermis cell F detail of D showing alkaloid droplets in hypodermis idioblasts G stem stained with Toluidine blue showing the thick layer of collenchyma beneath the epidermis and the two concentric circles of vascular bundles H detail of G showing the wall thickenings of the angular collenchyma. Ad: Alkaloid droplet; Cb: cortical circle of vascular bundles; Co: angular collenchyma; cx: cortex; ep: epidermis; hp: hypodermis; Mb: medullary circle of vascular bundles; Pi: pith; Td: terpenic droplet; Tr: trichome; Uh: upper hypodermis.