中药材芒种花的显微鉴定

Microscopic Identification on Chinese Medicine "Mangzhonghua"(Hypericum patulum Thunb.)

在植物分类学鉴定的基础上,采用徒手制片法和水合氯醛透化法对芒种花的茎、叶横切面和粉末特征进行了研究.结果表明:芒种花茎、叶的横切面与粉末显微特征明显,即:小枝有2棱,断面中空,叶片散布透明腺点;分泌腔和草酸钙簇晶多见;下表皮气孔不定式.以上特征可为该药材的开发推广应用提供鉴定参考依据.

Routine methods of pharmacognosy such as the freehand sectioning and chloral hydrate were opplied to investigate the microscopic characters of the leaves and stems of Mangzhonghua.The results show that there are distinct characteristics of the appearance and microscopic structures of the transection and powder.The appearance of the twigs has two longitudinal ridges.The cross sections of the stem are hollow-structured and the leaves have some transparent glands.Both of secretory cavities and calcium oxalate crystals are rich.The stomatal apparatuses on the lower epidermis were of the irregular type.Such major characters could serve as evidences for the identification of the ethnomedicine in the exploitation and utilization.