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Having leaves in two ranks/planes only. Basically, as each leaf develops from the central point, it overlaps a previous leaf on the same or opposite side, giving the plant a \'flattened\' appearance. Many aloes and a few palms are distichous, and probably many other plants as well. An example of an aloe that, at least as a seedling, is distichous is Aloe suprafoliata, which is named after this characteristic (leaves stacked on top of each other). Later, as this species ages, the leaves start to spread out in a more typical rosette and is no longer distichous. A distichous palm example is Wallichia distichia (obviously named for this characteristic).. all the leaves of this palm are in two ranks giving the palm a sort of two dimensional appearance.
