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| Photos by Renee Brecht | Britton and Brown. See
credits below.** |
| Botanical name: |
Helianthus giganteus L. |
| Common
name: |
giant sunflower |
| Synonomy: | | 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
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| Heritage ranking if any: |
n/a |
| Distribution: |
 |
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Sources
**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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