• Photo of Helenium autumnale (Helenium autumnales)

Plant Profile: Helenium autumnale

Taxonomy: Helenium autumnale

Names

Autumn Sneezeweed, Bitterweed, Common Sneezeweed, Dogtooth-daisy, Fall Sneezeweed, False Sunflower, Helen's Flower, Sneezeweed

  • Photo of Helenium autumnale (Helenium autumnales)

Phonetic Spelling:hel-EH-nee-um aw-tum-NAH-lay

Genus:Helenium

Species:autumnale

Family:Asteraceae

Common sneezeweed is prevalent across the United States, thriving in damp environments such as stream banks, ponds, swamps, and wetlands. This plant can be grown in soils ranging from average to rich, provided they remain moist to wet. To promote branching and enhance flowering, it is advisable to trim the plant back in early summer. Cultivated varieties tend to be more visually striking than their wild counterparts.

The name "sneezeweed" originates from its historical use, where crushed dried leaves and flower heads were turned into a type of snuff that induced sneezing.

It is important to note that the leaves, flowers, and seeds of common sneezeweed are toxic to humans when consumed in significant amounts, leading to gastric and intestinal distress that can be life-threatening. Additionally, the plant contains compounds that can be harmful to livestock, especially sheep and cattle.

Helenium autumnale Feature Summary

Helenium autumnale Image Gallery

Tags

#red
#yellow
#poisonous
#full sun tolerant
#orange
#perennial
#brown
#fall interest
#wetlands
#summer flowers
#swamps
#wildflower garden
#food source fall
#food source nectar
#food source pollen
#Coastal FACW
#Piedmont Mountains FACW
#food source hard mast fruit
#butterfly friendly
#partial shade tolerant
#audubon

Similar Plants

Helenium autumnale is often confused with:

Helenium autumnale Feature Summary

Attributes
Powdered leaves and flower heads were used in the treatment of colds and congestion by inducing sneezing. Indians used an infusion of the leaves as a laxative.d
Eastern US and Canada, Midwest and Gulf Coast
Perennial
Fruit
Displays from October to November
Flowers
flattened or ball-shaped flower heads with bright yellow wedge-shaped rays which are 3-lobed at the outer end, drooping away from the center ball.
Gold/Yellow
Brown/Copper
Orange
7 - 20 petals/rays
1-3 inches
Leaves
stalkless, usually toothed, 2-5 in. long; wing-angled stems; branches toward the summit
Oblong
Lanceolate
3-6 inches
Poisonous to Humans
Salivation, elevated temperature and pulse, difficulty of breathing, vomiting, and convulsions. TOXIC ONLY IF INGESTED IN LARGE QUANTITIES.
Sesquiterpene lactone
Seeds
Leaves
Flowers
Whole Plant Traits
Perennial
Native Plant
Poisonous
Wildflower
Herb
Erect
Clumping
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Moist
Occasionally Wet
Frequent Standing Water
Coastal
Mountains
Piedmont
4a
4b
5b
5a
6a
6b
7a
7b
8b
8a
3a
3b
Clay
High Organic Matter
Landscape
Pollinator Garden
Rain Garden
Cottage Garden
Deer
Wet Soil
Poor Soil
Meadow
Naturalized Area
Riparian
Butterflies
Pollinators
Songbirds
Small Mammals
Poisonous to Humans

Helenium autumnale Attributes

Helenium autumnale: Uses (Ethnobotany)

Powdered leaves and flower heads were used in the treatment of colds and congestion by inducing sneezing. Indians used an infusion of the leaves as a laxative.d

Helenium autumnale: Country Or Region Of Origin

North America

Helenium autumnale: Distribution

Eastern US and Canada, Midwest and Gulf Coast

Helenium autumnale: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Helenium autumnale: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Helenium autumnale Fruit

Helenium autumnale: Fruit Description

Displays from October to November

Helenium autumnale: Display/Harvest Time

Fall
Spring
Summer
Winter

Helenium autumnale Flowers

Helenium autumnale: Flower Description

flattened or ball-shaped flower heads with bright yellow wedge-shaped rays which are 3-lobed at the outer end, drooping away from the center ball.

Helenium autumnale: Flower Color

filter_vintage
Brown/Copper
filter_vintage
Gold/Yellow
filter_vintage
Orange

Helenium autumnale: Flower Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Helenium autumnale: Flower Bloom Time

Winter
Spring
Summer
Fall

Helenium autumnale: Flower Petals

2-3 rays/petals
4-5 petals/rays
6 petals/rays
7 - 20 petals/rays
asymmetrical petals
Bracts
Colored Sepals
fused petals
more than 20 petals/rays
Tepals

Helenium autumnale: Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Helenium autumnale: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Helenium autumnale Leaves

Helenium autumnale: Leaf Description

stalkless, usually toothed, 2-5 in. long; wing-angled stems; branches toward the summit

Helenium autumnale: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Helenium autumnale: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Helenium autumnale: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Helenium autumnale: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Helenium autumnale: Hairs Present

No
Yes

Helenium autumnale: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Helenium autumnale Poisonous to Humans

Helenium autumnale: Poison Symptoms

Salivation, elevated temperature and pulse, difficulty of breathing, vomiting, and convulsions. TOXIC ONLY IF INGESTED IN LARGE QUANTITIES.

Helenium autumnale: Poison Toxic Principle

Sesquiterpene lactone

Helenium autumnale: Poison Severity

High
Low
Medium

Helenium autumnale: Causes Contact Dermatitis

No
Yes

Helenium autumnale: Poison Part

Bark
Flowers
Fruits
Leaves
Roots
Sap/Juice
Seeds
Stems

Helenium autumnale Whole Plant Traits

Helenium autumnale: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Helenium autumnale: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Helenium autumnale: Maintenance

Low
Medium
High

Helenium autumnale Cultural Conditions

Helenium autumnale: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Helenium autumnale: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Helenium autumnale: NC Region

Coastal
Mountains
Piedmont

Helenium autumnale: USDA Plant Hardiness Zone

thermostat
3a
thermostat
3b
thermostat
4a
thermostat
4b
thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b

Helenium autumnale: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Helenium autumnale Stem

Helenium autumnale: Stem Is Aromatic

No
Yes

Helenium autumnale Landscape

Helenium autumnale: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Helenium autumnale: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Helenium autumnale: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Helenium autumnale: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees

Helenium autumnale: Problems

Allelopathic
Contact Dermatitis
Frequent Disease Problems
Frequent Insect Problems
Invasive Species
Malodorous
Messy
Poisonous to Humans
Problem for Cats
Problem for Children
Problem for Dogs
Problem for Horses
Short-lived
Spines/Thorns
Weak Wood
Weedy