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Downy sunflower is a very attractive sunflower which blooms in late summer. The composite flowers arise directly from the main stem. Each flowerhead is 2-4" across with 15-30 yellow ray florets and over 75 yellow disc florets in a 1" diameter central disk. Individual ray florets are sterile, the "petal" is about 1-1.5" long. Disc florets are about 1/4" long with five triangular lobes at the end of a tubular corolla; five stamens with white filaments (fused around the base of the style) and purple-brown anthers; and a single style, bifurcated at its tip, which protrudes above the stamens.
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Helianthus

Helianthus mollis

downy sunflower [Blooms: Aug-Sep]

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I want to acknowledge the work of a friend and colleague, Dr. Fred Donner. We both share a passion for the flowers in Jackson Park. Fred's website (jacksonparkwildflowers.org) inspired me to build my own website and database; use and enjoy them both.

I am also pleased to thank my ninja web gurus and coders, Lindsey Young and Stefanie Engstrom. This site would not exist without their herculean labors.

Copyright 2026 © Michael LaBarbera

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