Anti-arthritic property of crude extracts of Piptadeniastrum africanum (Mimosaceae) in complete Freund's adjuvant-induced arthritis in rats

非洲含羞草（Piptadeniastrum africanum，含羞草科）粗提物对弗氏完全佐剂诱导的大鼠关节炎的抗关节炎作用