The landowner showed us this Large-flowered White Trillium that she had found when she bought the property; that year it had 4 petals. Each year it grew another petal. We think it wants to be a rose.
Growing in saturated organic muck soil along Dedrick's Creek. I really don't know what this could be, it has characteristics of both D. carthusiana and D. cristata but alot of photos of the hybrid don't quite look like this.
Top plant big leaf
Growing in 50-75cm of still water on deep organic soil along Dedrick's Creek with Ceratophyllum demersum.
Stipules are free (not adnate for any part of their length). Leaves ~2.2-2.4mm wide, all submersed. Stipules are fairly coarse (pulling them with tweezers takes some force to break them apart), whitish to brownish in colour. Leaf tips fairly sharp-pointed. Fruits smooth with no obvious ridge/keel. Leaves with few veins.
Centre nuts in grouping. C. cordiformis and C. ovata occur nearby.
Found by @theplantguy
mid-stem leaves in comparison photo: S. flexicaulis (L), hybrid (centre), S. caesia (R). Lower stem leaves of hybrid were broader, with obvious lateral veins (see e.g., plant at bottom left of photo 1)
Clumps on various mineral soil mounds (old tree tip-ups?) in sandy mesic forest.
Fruit on the left in all three photos.
Sensu stricto. Fruit on the right in all three photos.