Scientific name: Opuntia humifusa, sometimes called Opuntia compressa
Common name: Prickly Pear
Indigenous name: Nōpalli (Nahuatl, typically refers to the pads as I understand)
Native range: Eastern and central North America
“It has the largest range of any cactus in the United States and can be found from New Mexico and Montana east to Florida and Massachusetts. It is also found in Ontario.” (US Forest Service)
Habitat:  Open, dry areas, often on calcareous rock or thin soils
Bloom time: Late spring/early summer
Bloom color: Yellow
Light: Full sun
Uses: Landscaping
Planting date: Springtime
Native species

References
US Forest Service. Eastern Prickly Pear (Opuntia Humifusa (Raf.) Raf.). https://www.fs.usda.gov/wildflowers/plant-of-the-week/opuntia_humifusa.shtml#:~:text=The%20prickly%20pears%20are%20considered,is%20also%20found%20in%20Ontario.