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(a) Leaves of A. muricata with an obovate, oblate, and acuminate shape. The leaf surface is dark green, with a thick and glossy upper surface. (b) The fruits are dark green and prickly. (c) The flower petals are thick and yellowish. The outer petals meet at the edges without overlapping and are broadly ovate, tapering to a point with a heart-shaped base. The inner petals are oval-shaped and overlap.
