Willows, Salix spp.
Pussy willow, Salix discolor Pollen grain morphology: tectate, tricolpate, reticulate Pollen grain size: 20.36 + 0.54 µm by 19.05 + 0.21 µm Weeping willow, Salix × sepulcralis Pollen grain size: Equatorial: 18.69 µm by ...
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