Plants of Southern New Jersey

Citizens United to Protect the Maurice River & Its Tributaries
Photos by Renee Brecht    Plants of Southern NJ: Home Citizens United to Protect the Maurice River 

Plant Profile

Helianthus giganteus L. 

giant sunflower

Helianthus giganteus

Helianthus giganteus

Photos by Renee BrechtBritton and Brown. See credits below.**

Botanical name: Helianthus giganteus L.
Common name: giant sunflower
Helianthus alienus E.E. Watson
Helianthus borealis E.E. Watson
Helianthus giganteus L. ssp. alienus (E.E. Watson) R.W. Long
Helianthus giganteus L. var. subtuberosus Britton
Helianthus nuttallii Torr. & A. Gray var. subtuberosus (Britton) B. Boivin
Helianthus subtuberosus (Britton) Britton
Helianthus validus E.E. Watson
Group: dicot
Family: Asteraceae
Growth Type: forb/herb
Duration: perennial
Origin: native
Plant height: 1.5-10'
Foliage: oval or nearly oval; leaves opposite (lower), alternate (upper); toothed or toothless
Flowers: yellow; heads several to many; involucral bracts narrowly oval, often hairy; heads 1-3.5', rays 10-20
Flowering/fruiting time: July to September
Habitat: swamps, moist places
Range in New Jersey: statewide
Heritage ranking if any: n/a

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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 303.
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