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SEM images of various crystals in a branchlet of Acacia robeorum. (A) A prismatic crystal (arrow). (B) A pseudo-prismatic block. (C) Raphides (arrows). (D) A few solitary styloids (arrows). (E) A cluster of raphides and styloids. (F) A bundle of crystals which are intermediate forms of styloid and raphide. (G) Bladed aggregation clusters. (H) A bladed aggregation cluster. Scale bars: (A, D, E, F) = 20 µm; (B) = 5 µm; (C) = 50 µm; (G, H) = 2 µm.
