Helianthus radula (Pursh) T. & G. - Stiff Sunflower

Helianthus radula plant

Family - Asteraceae


Helianthus radula scapePubescence of the flowering scape.


Helianthus radula basalsBasal leaves.




Helianthus radula involucre

Ray flowers:


Disk flowers:

Helianthus radula flowers

Helianthus radula fruitsFruiting head.

Flowering - August - October.

Habitat - Wet flatwoods, savannahs, pine barrens.

Origin - Native to North America.

Other information - This species can be found in just a handful of southern Alabama counties. The plant is simple to identify because of its rayless flowerheads and rounded basal leaves. The scape is scabrous due to the pustulate bases of the hairs on it.
The genus name Helianthus derives from the Greek "helio" meaning "sun" and "anth(us)" meaning "flower."
The species eipthet radula derives from the Latin "radul(a)" meaning "scraper" referring to the scabrous scape.

Alabama Distribution:

Helianthus radula map

Photographs taken at Conecuh National Forest, AL., 10-23-04.

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