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Light micrographs of developing stomata. (A, B) Begonia calderonii. (C–F) B. nelumbiifolia. (G, H) B. conchifolia. (I) B. venusta. gc, guard cell; gmc, guard-mother cell; m, meristemoid. Scale bars: A–C, E, F, H = 10 µm, D = 20 µm, G, I = 50 µm.
