单词：crataegus
much used for ornamental purposes.
crataegus的用法和样例：
例句
- Chemical constituents from leaves of Crataegus pinnatifida Bge.山楂叶的化学成分。
- Any of various usually thorny trees or shrubs of the genus Crataegus having clusters of white or pinkish flowers and reddish fruits containing a few one-seeded nutlets.山楂一种山楂属乔木或灌木，通常带刺，有白色或粉色花簇和微红色内有一些单籽小核的果实。
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