台灣鴛鴦湖自然保留區花粉誌（IV）

Pollen Flora of Yuenyang Lake Nature Preserve, Taiwan (IV)

鴛鴦湖為酸性湖泊，位於台灣北部的自然保留區內。本研究採集該區隸屬五科十九種植物的新鮮花粉，經處理後，以光學顯微鏡和掃瞄式電子顯微鏡觀察這些花粉的形態。依花粉萌芽口的不同，分為四群：三溝、六溝、三溝孔和四至七溝孔的花粉。本研究為連續研究（Chen and Wang, 1999, 2001；Wang and Chen, 2001）之第四篇，這些結果可作為研究鴛鴦湖湖積物內之花粉，並進而作為重建鴛鴦湖周邊植群史的基本資料。

Yuenyang Lake is an acidic lake situated within a nature preserve in northern Taiwan. The pollen of nineteen taxa, belonging to live families, was collected from this nature preserve and investigated with light and scanning electron microscopy. The results of this investigation are supplementary work to the previous publications in this journal (Chen and Wang, 1999, 2001; Wang and Chen, 2001). A total of 4 pollen classes were identified on the basis of the aperture on the pollen wall: 3-colpate, 6-colpate, 3-colporate, and 4-7-colporate pollen. These results could be useful in the reconstruction of vegetation history around the Yuenyang Lake.