US Patent Issued to Walters Gardens on Aug. 25 for "Thalictrum plant named 'Cotton Ball'" (Michigan Inventor)

ALEXANDRIA, Va., Aug. 25 -- United States Patent no. PP37,649, issued on Aug. 25, was assigned to Walters Gardens Inc. (Zeeland, Mich.).

"Thalictrum plant named 'Cotton Ball'" was invented by Hans A. Hansen (Zeeland, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The new and distinct cultivar of ornamental Meadow Rue, Thalictrum plant named 'Cotton Ball' with tripinnately compound foliage of medium green, wispy white-colored flowers on dark stems in late spring that appear well above the foliage. The new plant is winter-hardy and useful for ornamental purposes."

The patent was filed on Feb. 25, 2026, under Application No. 19/729,051.

*For further information, including images, charts and tables, plea...