Fig. 2.
Light micrographs of leaf transverse sections. (A) Begonia nelumbiifolia. (B) B. heracleifolia. (C) B. calderonii. (D) B. venusta. (E) B. conchifolia. h, hypodermis (absent from D). Scale bars: A, C, E = 50 µm, B = 200 µm, D = 100 µm.
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