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Sweet coneflower flowerheads are 2-3.5" across, occurring as single blooms on the tips of stems or branches. A flowerhead is comprised of numerous 1/2" long medium green, lance-shaped phyllaries, downy with short hairs; 10-20 bright yellow, oblong, sterile ray florets with a tiny notch at their tips; and a deep brown hemisphere of 200-400 disk florets (the central disc). The disk florets have a tubular, dark reddish-purple corolla; bifurcated stigmas that have sharp tips; with the purplish-brown anthers adhering side by side around the deep purple styles. Sweet coneflower is distinctive among the Jackson Park coneflowers with its chocolate brown disk and bright yellow, elongate-oval petals with a shallow notch at their tips.

Rudbeckia

Rudbeckia subtomentosa

sweet coneflower [Blooms: Jul-Aug]