Helianthus nuttallii (Nuttall's Sunflower)

Plant Info
Also known as:
Family:Asteraceae (Aster)
Life cycle:perennial
  • State Special Concern
Habitat:sun; moist to wet; prairies, swales, sedge meadows
Bloom season:August - September
Plant height:3 to 8 feet
Wetland Indicator Status:GP: FACW MW: FACW NCNE: FACW
MN county distribution (click map to enlarge):Minnesota county distribution map
National distribution (click map to enlarge):National distribution map

Pick an image for a larger view. See the glossary for icon descriptions.

Detailed Information

Flower: Flower shape: 7+petals

[photo of flower] One to 6 flowers at the top of the plant, often 2 or 3 clustered at the stem tip and sometimes 1 or 2 arising from the uppermost leaf axils. Individual flowers are 2 to 3 inches across with 10 to 21 ray flowers (petals) and yellow center disk flowers.

[photo of phyllaries] Surrounding the base of the flower are 2 to 3 layers of narrowly triangular, sharply pointed bracts (phyllaries), each phyllary usually with a fringe of short hairs around the edges especially near the base, and often stiff hairs on the surface. Phyllaries are loose and somewhat spreading.

Leaves and stems: Leaf attachment: alternate Leaf attachment: opposite Leaf type: simple

[photo of leaf] Leaves are 2 to 8 inches long and to 1½ inches wide, narrowly lance to egg-shaped, toothless to shallowly toothed, sharply pointed to blunt at the tip, wedge-shaped to somewhat rounded at the base, on a stalk up to ½ inch long. The upper surface is hairless or with a few short hairs, the lower surface rough from short, stiff hairs. Leaves are mostly opposite though may be alternate on the upper stem.

[photo of stem hairs] Stems are erect, hairless to sparsely short-hairy, green to yellowish or sometimes purplish, single or a few from the base, sometimes branched in the upper plant. Plants have short rhizomes and tuberous roots.

Fruit: Fruit type: seed without plume

[photo of seeds] The center disk forms a head of dry seed each up to 5 mm (~¼ inch) long and without a tuft of hair, but with 2 bristle-tipped scales at the top.


Nuttall's Sunflower is uncommon in Minnesota, where it reaches the eastern edge of its range in our western counties, though disjunct populations have been found in Canada as far east as Quebec. Habitats are primarily in open, moist to wet prairies and meadows. According to the DNR, there have only been about 15 documented locations, about half of which are over 50 years old that have not been relocated. They note one possible cause of its rarity is the perception that sunflowers are a difficult group to ID, so when encountered they have a tendency to be skipped over. I know that feeling pretty well. Due to its probable actual rarity in the state and lack of knowledge on its specific habitat requirements in Minnesota, it was listed as a Special Concern species in 1984.

Nuttall's Sunflower is recognized by leaves mostly opposite (opposite or alternate on the upper stem), toothless to shallowly toothed, on stalks up to ½ inch long; stems are hairless to sparsely hairy; just 1 to 6 flower heads at the top of the stem. While it's been documented as reaching 8+ feet tall, 5 feet is more common. It bears a resemblence to both Giant Sunflower (Helianthus giganteus) and Sawtooth Sunflower (Helianthus grosseserratus), both of which may have as many as 12 to 15 flower heads per stem. Giant Sunflower leaves are all or mostly alternate and coarsely toothed to nearly toothless, and stems are consistently hairy; Sawtooth Sunflower leaves are more consistently sharply toothed, leaf stalks are up to 1½ inches long, and stems are hairless and usually covered with a waxy bloom.

There are 3 subspecies of Helianthus nutallii: subsp. parishii, restricted to California (possibly extinct), has long hairs on leaves and phyllaries; subsp. nuttallii, found from South Dakota westward, has mostly alternate leaves with sharply pointed tips; subsp. rydbergii, found from Minnesota westward, has mostly opposite leaves with pointed to blunt tips.

Native Plant Nurseries, Restoration and Landscaping Services ↓

Map of native plant resources in the upper midwest

  • Shop for native seeds and plants at PrairieMoon.com!
  • Shooting Star Native Seeds - Native Prairie Grass and Wildflower Seeds
  • Morning Sky Greenery - Native Prairie Plants
  • Natural Shore Technologies - Using science to improve land and water
  • Minnesota Native Landscapes - Your Ecological Problem Solvers

More photos

Photos by K. Chayka and Peter M. Dziuk taken in North Dakota.


Have you seen this plant in Minnesota, or have any other comments about it?

Posted by: bedi - chaska
on: 2022-08-29 10:24:01

i found these by the local elementary school, when i smelled them i noticed they smelled kind of like chocolate!! thats how i ID'd them!

Posted by: K Chayka
on: 2022-08-29 13:52:11

Bedi, it is more likely you saw a different sunflower in Chaska, probably sawtooth sunflower, Helianthus grosseserratus.

Posted by: Ronna Blackley - found in Doylestown Wisconsin
on: 2023-08-28 13:56:39

I found these growing in our marsh in Doylestown Wisconsin.This site says they grow in Minnesota and to the west...we are definitely East..

Posted by: K Chayka
on: 2023-08-28 14:05:05

Ronna, more likely you have Helianthus giganteus, giant sunflower, which should be pretty common in your area.

Post a comment

Note: All comments are moderated before posting to keep the spammers out. An email address is required, but will not be posted—it will only be used for information exchange between the 2 of us (if needed) and will never be given to a 3rd party without your express permission.

For info on subjects other than plant identification (gardening, invasive species control, edible plants, etc.), please check the links and invasive species pages for additional resources.


Note: Comments or information about plants outside of Minnesota and neighboring states may not be posted because Id like to keep the focus of this web site centered on Minnesota. Thanks for your understanding.