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刚读了一篇刊登在 Colorado State Univ. 的文章,写得非常清楚。
<<Flowering Crabapple Trees>> by Prof. J. Klett and R. Cox, 2012年的。
"Some varieties of crabapple have showy fall leaf color, ranging from yellow to orange to red and purple.
Crabapple twig and bark color ranges from green to yellow to reddish brown when young. Many crabapples
develop attractive mottled bark as they mature. "
跟 Green Shadow 说的一样。



