Syringa vulgaris
 
Lilac

Stamen

Regina
28-May-2020

This is one of the two stamens in the flower.  By the time the flower is fully open, the anther has usually dehisced releasing the pollen.  Note the filament is adnate to the inner surface of the corolla tube.

Syringa: Answers to key questions in Vascular Flora of Alberta: An Illustrated Guide leading to this genus. 

shrubs; NOT [trees]

leaves simple, undivided; NOT [leaves pinnately divided into 5-9 leaflets]

flowers conspicuous, in showy pyramidal clusters; NOT [flowers tiny, inconspicuous]

flowers with 4 petals; NOT [flowers without petals]

fruits +/- woody capsules with winged seeds; NOT [fruits winged samaras]