Of herbaceous plants, the only one in flower was the rudbeckia fulgida.
This the rudbeckia will do, every time, if not promptly checked.
About two feet behind this border, a row of rudbeckia (Golden Glow) grows like a tall hedge.
Strong-growing perennials, asters or the biennial rudbeckia triloba, are good for this purpose.
These are rudbeckia hirta, Artemisia biennis, Plantago aristata.
Said involucrum is composed of numerous small leaves, a distinguishing trait from its nearest relative genus rudbeckia.
I owe to the kindness of Professor Oliver a sketch of a species of rudbeckia?
"Golden Glow" rudbeckia is quite as strong a grower as the Delphinium, and a more prolific bloomer does not exist.
Cone-flower (rudbeckia hirta), 138;embryo seeds; arrangement of the anthers, 139.
He showed me a rudbeckia about three feet high with a cone of dark purple flowers, probably a new species.