Hylodesmum glutinosum or Desmodium glutinosum
   
Large Tick-Trefoil or Pointed-leaved Tick Trefoil

• Average to slightly dry soils
• Partial to Full Shade
• 24” tall, 18” to 24” wide 
• Summer Blooms
• Ontario Native, Thriving in Open Woodland and Forest ecosystems, Nitrogen Fixing 

New to me, grown from seeds from Prairie Moon Nursery https://www.prairiemoon.com/desmodium-glutinosum-pointed-leaved-tick-trefoil-prairie-moon-nursery.html 

This summer blooming species is well adapted to deciduous woodlands and forests. Definitely a species I’d suggest giving a try in a partially shaded garden, where their airy sprays of summer blooms would likely show off nicely, while also filling a part of the growing season that often has a gap in blooms in shaded areas.

Please check out the Prairie Moon listing at the link above for more details.

Photos by Fritzflohrreynolds, Joshua Mayer, Douglas Goldman, Melissa McMasters and Douglas Goldman via Wikimedia Commons