中国东北牻牛儿苗科（Geraniaceae）种子形态特征及其分类学意义

SEED MORPHOLOGY OF GERANIACEAE IN NORTHEASTERN CHINA AND ITS TAXONOMIC SIGNIFICANCE

本文对中国东北牛儿苗科（Ｇｅｒａｎｉａｃｅａｅ）二属（太阳花属Ｅｒｏｄｉｕｍ，老鹳草属（Ｇｅｒａｎｉｕｍ）计１４种（ｓｐｅｃｉｅｓ）１变种（Ｖａｒｉｅｔｙ）和１变型（ｆｏｒｍ）植物的种皮亚显微结构（ＳＥＭ）及种子形态进行了研究．结果表明，太阳花属与老鹳草属植物无论从种子形状，长宽比，还是种皮初级雕纹及次级雕纹形态都表现出明显差异。在老鹤草属下种及种下等级的鉴定和划分上，种皮微形态及种子形态特征提供了大量有价值的信息。

In this psper, the seed coat submorphology and seed morphology of Geraniaceae(2 genus.14 species 1 variety and 1 form) in Northeastem China were studied.the results show that there are many differences between genus Erodium and genus Geranium either seed-coat sculpture (primary and secondary sculpture) or seed morphology (seed shape.length/width ratio). Seed and seed-coat morphology provsde a lot of key information with taxonomy of genus Geranium.The present seed coat and seed morphological classificationis is in accordance with Kitagawa’s svstem of Geraniaceae,which was done using other morphological characters.