Helianthus petiolaris

Click on the images below to see larger versions.

Scientific Name Helianthus petiolaris USDA PLANTS Symbol
Common Name Prairie Sunflower ITIS Taxonomic Serial No.
Family Asteraceae (Sunflower) SEINet
Click Here
Description Life zones and habitat: Semi-desert to montane; sunny, dry areas.
Plant: Erect annual 1-1/2 to over 6 feet tall, often-branched stem with fine hairs.
Leaves: Mostly along stems, lanceolate to ovate, 1-1/2 to 6 inches long, petiolate, may be dotted with glands, hairy underneath, small teeth along edges.
Inflorescence: Single composite flowers 2 to 3 inches across with 10 to 30 yellow rays and 50 to 100+ reddish disk florets in the center. Resembles Common Sunflower (H. annuus) except for the leaves.
References: Descr. adapted from "Flora of Colorado" by Jenifer Ackerfield and SEINet.
Colorado Status

© Tom Lebsack 2018