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Salvadora persica. Petal and stamen initiation. (A) Early initiation of petal primordia. (B) Older stage showing differentiation of the androecium. (C) Successive initiation of stamens. (D) Overview of young inflorescence with older central flower below. (E) Detail of older flower in (D). Scale bars: (A) = 10 µm; (B, C, E) = 20 µm; (D) = 100 µm. Abbreviations: a, stamen primordium; Sl, lateral sepal; Sm, median sepal; P, petal.
