Golden Alexanders (Zizia aurea)
Apiaceae or Celery Family

Small erect plant, with tiny, yellow, 5-petalled flowers in dense, flat-topped clusters.  Stem leaves mostly divided into 3toothed, lance-shaped leaflets, while basal leaves are divided into even more leaflets.  Blooms in late spring in open woods and on woodland edges. 

Common on western slope of the Park.

Heart-leaved Alexanders (Z. aptera) is very similar, but the basal leaves are heart-shaped instead of divided into muliple leafleats. Yellow pimpernel blooms in the same area about the same time.  It has flowers in much more open clusters and untoothed leaflets.