www.zinnysworld.com          Copyright 2000-2017 by Thomas Zinneman.  All rights reserved.

Blackeyed Susan    Rudbeckia hirta

The range distribution maps for the Blackeyed Susan are from the Plants Database of the U.S. Department of Agriculture (USDA).

The Blackeyed Susan is a common wildflower found along roadsides, old fields, pastures, forest margins, and open woodlands.  It has been found in every state of the lower 48 and in all of the Canadian provinces.  It is a Florida native plant and is found in most counties, blooming from February through November.

These plants grow to a height of 12-36 inches.  They have a large flower head 2-3 inches in diameter.  The brown cone-shaped center (disk flowers) is surrounded by 10-20 yellow petals (ray flowers).

The long hairy stem originates from a basal rosette of hairy three-veined leaves on petioles (stalks).  Further up, the leaves are sessile (without stalks) and slightly clasp the stem.

These flowers attract a variety of insects, including bees, wasps, beetles, and butterflies.  Note that the plants are toxic to cats when ingested.

All of the images on this page were taken in Deep Creek in Charlotte County.  The insects on the flower in the lower images are, from left to right, Blister Beetle, Wasp, and Metallic Wood Borer.