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(a–c) Vo: (a) dried root/rhizome; (b–c) powdered material: (b) parenchymatous cells with starch grains (20×); (c) starch grains (40×); (d–f) Vj: (d) dried root/rhizome; (e–f) powdered material: (e) scalariform vessels (20×); (f) starch grains (40×); (g–i) Nj: (g) dried root/rhizome; (h–i) powdered material: (h) cork cells (10×); (i) fibers and small starch grains (40×).
