Family: Rubiaceae

Pollen Grain Morphology: Stephanocolpate, slightly verrucate or sub-reticulate

Pollen Grain Size: (polar) 27.2 µm by 24.5 µm

 

And these two photos are potentially another Galium species (unconfirmed species ID).  They are a little smaller: 19.4 + 0.3 µm by 17.9 + 0.3 µm