A coneflower’s propagule is typically small, oblong, and somewhat flattened. Often dark brown or grey in color, it can be easily overlooked due to its unassuming appearance. The seed itself is encased within a hull or chaff, which is a remnant of the flower’s structure. This covering can appear rough or textured, adding to the overall nondescript nature of the seed. For Echinacea purpurea, a common variety, the seed averages about 1/4 inch in length, though size can vary slightly.
Understanding the morphology of these seeds is crucial for successful propagation and cultivation. Recognizing the seed amidst debris ensures proper collection and sowing techniques. Furthermore, knowing the characteristics allows for differentiation from weed seeds or other unwanted material in collected seed batches. This understanding benefits both home gardeners seeking to expand their flowerbeds and commercial growers aiming to produce large quantities of these valuable plants.