I am familiar with Acer palmatum 'Ara kawa', A.p. 'Ibo nishiki' , and A.p. 'Nishiki gawa' as the Japanese maples with rough, corky bark. Are there any others? I have a small, 2'x4' speciman that has rough bark and very small, palmate leaves but size wise, it doesn't match up to the three I mentioned.