2016 population survey

Pollen counts on stigmas from naturally pollinated P. viscosum flowers. Pollen identified as Salix and P. viscosum (denoted by “pv” in the data file) were quantified using light microscopy. Salix pollen contamination was estimated as the frequency (proportion) of total pollen identified as Salix pollen. The site name, unique sample number (“sample ID), and the distance (m) from the focal plant to the nearest Salix spp. plant are included.

天然传粉的P. viscosum花柱头的花粉计数数据。经鉴定为柳属（Salix）花粉与P. viscosum花粉（数据文件中以"pv"标注）的样本，均通过光学显微镜完成定量计数。柳属花粉污染程度通过鉴定所得柳属花粉占总鉴定花粉的频率（比例）进行估算。数据集包含样地名称、唯一样本编号（"sample ID"）以及目标植株至最近柳属（Salix spp.）植株的距离（单位：米）。