本研究利用掃描式電子顯微鏡對扛板歸、酸模、小葉碎米薺、廣東葶藶、多花水莧菜、含羞草、虱目子菜、黃花酢醬草、心葉母草、野塘蒿、金腰箭及蒺藜等12種雜草，行種子外部形態微細構造之觀察。以所得顯微照片為依據描述各個雜草其種身、種臍之構造特徵，並予以分類。

Seeds of 12 weed species. Polygonum perJoliatum L .• Rumex acetosa L .• Cardamin parviflora L .. Rorripa cantoniensis Ohwi, Ammannia multiflora Roxb, Mimosa pudica L. Urena lobata L .. Oxalis corniculata L., Vandellia cordifolia (Colsm) G. Don., Erigertm bonariensis L., Syndrella nodif'lora Gaertn, and Cenchrus echinatus L., were observed with Scanning Electron Microscope (SEM). Based on photograph obtained, fine structures of seed of each species were described and classified. Additional index words: Polygonum perfoliatum Rumex acetosa , Cardmin parviflora, Rorripa cantoniensis Ammann;a multiflora, Mimosa pudica, Urena lobata, Oxalis comiculasa, Vandellia eordi f olia, Erigeron bonariensis, S yndrella nodi/lora, Cenchrus echinatus .