Thinleaf Sunflower

Yellow and everywhere! Helianthus decapetalus is an occasionally branching plant from 2 to 5 feet tall, with multiple flower heads on long stalks. It is a relatively leafy sunflower, with opposite leaves on the lower part of the plant and alternate leaves on the upper part of the plant. This is one of the sunflowers that may have green or reddish stems. The stems are smooth, occasionally glaucous, in the lower part, and may have short hairs in the upper area, usually so in the inflorescence. It blooms in late summer and well into fall.