这个词是什么意思？
A plant family of the order Rhamnales, subclass Rosidae class Magnoliopsida. The plants have a characteristic silvery or rusty-colored sheen, caused by tiny distinctive scales. Flowers have a tubular structure of four sepals. Root nodules host the Frankia (ACTINOMYCETES) nitrogen-fixing symbionts.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D031263 · MeSH 2026。
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