• Photo of Silphium integrifolium (Silphium integrifoliums)

Plant Profile: Silphium integrifolium

Taxonomy: Silphium integrifolium

Names

Entire-Leaf Rosinweed, Prairie Rosinweed, Rosinweed, Whole-Leaf Rosinweed

  • Photo of Silphium integrifolium (Silphium integrifoliums)

Phonetic Spelling:SIL-phee-um in-teg-rih-FOE-lee-um

Genus:Silphium

Species:integrifolium

Family:Asteraceae

Rosinweed is a perennial herb native to the aster family, primarily found in the central United States and certain regions of Canada. This plant thrives in various environments, including roadsides, railroad tracks, fields, and pastures. Its striking, sunflower-like flowers bloom from late summer to fall atop stems that can reach heights of up to six feet, drawing in bees and butterflies.

This species is versatile and can adapt to a range of soil types, provided they are well-drained and receive full sun to partial shade. Once established, rosinweed demonstrates drought resistance. It is best suited for naturalized or native plant areas, as it may be considered too invasive for smaller gardens.

Silphium integrifolium Feature Summary

Silphium integrifolium Image Gallery

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Silphium integrifolium Feature Summary

Attributes
Central USA and into Canada
AL , AR , CO , IA , IL , IN , KS , KY , LA , MI , MN , MO , MS , NE , NM , OK , SD , TN , TX , WI
Attracts bees and butterflies. Songbird will eat the seeds.
Perennial
Flowers
2-3 inch wide sunflower-like flowers with 30-40 rays and many disc florets and subtended by bracts with reflexed tips. Blooms July to Sept.
Gold/Yellow
more than 20 petals/rays
1-3 inches
Leaves
Rough, stalkless, large paired leaves with or without teeth with resinous juices. Up to 8 inches long, lance to ovate shaped, hairs on both surfaces.
Ovate
Lanceolate
Entire
Serrate
> 6 inches
1-3 inches
Stem
Strong green stems
Hairy (pubescent)
Whole Plant Traits
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)
Neutral (6.0-8.0)
Good Drainage
Occasionally Dry
12 inches-3 feet
Less than 12 inches
Coastal
Mountains
Piedmont
4a
4b
5b
5a
6a
6b
7a
7b
8b
8a
Clay
Loam (Silt)
Sand
Landscape
Pollinator Garden
Border
Small groups
Woodland
Meadow
Naturalized Area
Pollinators
Songbirds

Silphium integrifolium Attributes

Silphium integrifolium: Country Or Region Of Origin

Central USA and into Canada

Silphium integrifolium: Distribution

AL , AR , CO , IA , IL , IN , KS , KY , LA , MI , MN , MO , MS , NE , NM , OK , SD , TN , TX , WI

Silphium integrifolium: Wildlife Value

Attracts bees and butterflies. Songbird will eat the seeds.

Silphium integrifolium: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Silphium integrifolium: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Silphium integrifolium Flowers

Silphium integrifolium: Flower Description

2-3 inch wide sunflower-like flowers with 30-40 rays and many disc florets and subtended by bracts with reflexed tips. Blooms July to Sept.

Silphium integrifolium: Flower Color

filter_vintage
Gold/Yellow

Silphium integrifolium: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Silphium integrifolium: Flower Bloom Time

Winter
Spring
Summer
Fall

Silphium integrifolium: 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

Silphium integrifolium: Flower Size

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

Silphium integrifolium Leaves

Silphium integrifolium: Leaf Description

Rough, stalkless, large paired leaves with or without teeth with resinous juices. Up to 8 inches long, lance to ovate shaped, hairs on both surfaces.

Silphium integrifolium: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Silphium integrifolium: Leaf Color

spa
Green

Silphium integrifolium: 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

Silphium integrifolium: Leaf Margin

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

Silphium integrifolium: Hairs Present

No
Yes

Silphium integrifolium: Leaf Length

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

Silphium integrifolium: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Silphium integrifolium: Leaf Width

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

Silphium integrifolium Stem

Silphium integrifolium: Stem Description

Strong green stems

Silphium integrifolium: Stem Is Aromatic

No
Yes

Silphium integrifolium: Stem Surface

Corky Ridges
Covered with a powdery bloom (glaucous)
Dull
Hairy (pubescent)
Polished
Smooth (glabrous)

Silphium integrifolium Whole Plant Traits

Silphium integrifolium: 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

Silphium integrifolium: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Silphium integrifolium: 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

Silphium integrifolium: Growth Rate

Slow
Medium
Rapid

Silphium integrifolium: Maintenance

Low
Medium
High

Silphium integrifolium: Texture

Fine
Medium
Coarse

Silphium integrifolium Cultural Conditions

Silphium integrifolium: 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)

Silphium integrifolium: Soil pH

Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)

Silphium integrifolium: Soil Drainage

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

Silphium integrifolium: Available Space To Plant

12 inches-3 feet
12-24 feet
24-60 feet
3 feet-6 feet
6-feet-12 feet
Less than 12 inches
more than 60 feet

Silphium integrifolium: NC Region

Coastal
Mountains
Piedmont

Silphium integrifolium: USDA Plant Hardiness Zone

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

Silphium integrifolium: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Silphium integrifolium Landscape

Silphium integrifolium: 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

Silphium integrifolium: Design Feature

Accent
Barrier
Border
Flowering Tree
Foundation Planting
Hedge
Mass Planting
Screen/Privacy
Security
Shade Tree
Small groups
Small Tree
Specimen
Street Tree
Understory Tree

Silphium integrifolium: 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

Silphium integrifolium: Attracts

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

Silphium integrifolium: 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