Rudbeckia fulgida var. deamii
Covered with deep yellow daisy flowers and black centres, for weeks, from August. Seems to make a dome of flowers.
Rudbeckia Fulgida var. Sullivantii ‘Goldsturm’
Another valuable perennial for later in the year. Shiny dark-green leaves, with stems of deep-yellow daisy flowers with black centres from August onwards.