Quercus macrocarpa
Bur Oak

Staminate Flower Side/Bottom

Intersection Highways #9 and #247

Note the calyx lobes (sepals) are united at the base.

Fagaceae: Answers to key questions in Budd's Flora leading to this family. 

shrubs or trees; NOT [herbs]

male flowers, at least, in catkins

flowers with only one floral ring, with sepals but not petals

styles 3 or more; NOT [styles2]

fruit an acorn

seeds without a tuft of hairs