Article from Bean's Trees and Shrubs Hardy in the British Isles
Recommended citation
'Grindelia' from the website Trees and Shrubs Online (treesandshrubsonline.
A genus of about sixty species, natives of western N. America and S. America. Most are perennial and several are sub-shrubs. The generic name commemorates David H. Grindel, a Russian botanist of German origin, 1776–1836.