Sudden Tract is a natural area in southern Ontario that
harbours a very high diversity of species. The property is comprised of
several ridges, in between which there are areas of marsh, shrub swamp,
and swamp. I started maintaining a plant inventory of the area. Here is
I use Newcombe's Wildflower Guide for common and scientific
names (except for ferns, trees & shrubs – I use Soper for shrubs,
trees, and the Owen Sound Field Naturalists fern book for ferns)
Please bear in mind that if there are obscure varieties of
a species, I have not taken them into account. I use Newcombe's
for 90% of my plant ID work.
This list is solely the result of my own work. I have not added
species that others have found.
There is of course the possibility that I made some errors in
identification. If there is a species listed here that is
erroneously identified, I welcome corrections & advice -- please
I have not updated the scientific names - the ones used here are from