Identifying Rosaceae PSI Master Class, April 16, 2013 9:30 to 12:30 @ Bowman’s Hill Wildflower Preserve

PSI Master Class: A Rose By Any Other Name… Identifying Rosaceae

Tuesday, April 16th, 9:30 am to 12:30 pm

@ Bowman’s Hill Wildflower Preserve

Members: $30 Non-Members: $35

Dr. Ann Fowler Rhoads, instructor

In the Pennsylvania flora the Rose Family is made up of 28 genera (144 species) of woody and herbaceous plants.  Growth form ranges from canopy trees in the forest to common wildflowers of fields and woods.  Flower and fruit form vary primarily by the degree of fusion in the ovary and its placement with respect to other flower parts.  In PA the family includes 1 federally listed threatened species and 18 that are tracked by the Pennsylvania Natural Heritage Program.

While species identification in many Rosaceae genera is straightforward, others including the shadbushes and hawthorns provide an ongoing challenge because of the processes such as apomixus (seed production without sex).

The Rose Family is important to wildlife through the processes of pollination and seed dispersal.  It also includes important fruit and ornamental crops.

We will try to understand what holds the family together as well as the characteristics that allow us to recognize individual genera and species.

To register, call 215 862 2924 or e-mail Jared Rosenbaum, PSI Coordinator, at


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