Copyright 1998-2017 Yoshiaki Yoneda
The leaf is five-pointed like a maple, but the leaf lobes become more retracted (or shorter) than usual.  This retraction of the leaf is due to the retracted gene, the tip of the leaf taking a slightly round shape.  The number of rays increases, and so the flower enlarges in diameter.   
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 1 x 1 |  4 x 4 | |
|  2 x 2 | ||
|  8 x 8 |  16 x 16 | 
1 x 1 (thumbnail images) : For indexing 2 x 2, 4 x 4, 8 x 8 : For viewing on monitor 8 x 8, 16 x 16 : For printing