Helianthus petiolaris, the prairie sunflower, a plant species in the genus Helianthus
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Hydrangea petiolaris, a species native to the woodlands of Japan, Korea and Sakhalin in easternmost Siberia
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Hakea petiolaris, the sea-urchin hakea, a shrub or small tree species endemic to the south-west of Western Australia
Helianthus petiolaris | Hydrangea petiolaris | Hakea petiolaris | Drosera petiolaris | Dodonaea petiolaris | Cordyline petiolaris |
Cordyline petiolaris, a plant species found in New South Wales, Australia