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A dichotomous key is best illustrated with an example. Here is the route through a key that was used to identify field maple and sycamore trees: (1) If it is a tree then go to (2). If it is not a tree then go to (5). (2) If leaves are in opposite pairs then go to (3). If leaves are not in opposite pairs then go to (5). (3) If leaves are lobed and arranged like fingers on a hand then go to (4). If leaves are not so arranged then go to (5). (4) If leaves have three lobes then it is Acer campestre (field maple). If leaves have five lobes then it is Acer pseudoplatanus (sycamore). (5) It is not a field maple or sycamore.
Blue, white, and red recall the 19th century Russian tricolour. The ‘Partisan Star’ was removed in 1991. Effective date: 27 April 1992.
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