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Bruso, George H.

Silphium integrifolium

Silphium integrifolium Michx.

Wholeleaf Rosinweed, Entire-leaf Rosinweed

Asteraceae (Aster Family)

Synonym(s):

USDA Symbol: SIIN2

USDA Native Status: L48 (N), CAN (I?)

A coarse perennial, 2-6 ft. tall with large, yellow composite flowers and rough, paired, oval to lance-shaped leaves.

From the Image Gallery

18 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Size Notes: Up to about 6 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: Yellow
Bloom Time: Jul , Aug , Sep

Distribution

USA: AL , AR , CO , IA , IL , IN , KS , KY , LA , MI , MN , MO , MS , NE , NM , OK , SD , TN , TX , WI , WY
Canada: ON
Native Distribution: IN to MS, w. to e. Great Plains
Native Habitat: Prairies

Growing Conditions

Light Requirement: Sun
Soil Description: Well-drained soils.

Value to Beneficial Insects

Special Value to Native Bees
Special Value to Bumble Bees

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.

Propagation

Description: Sow unstratified seed in fall or stratified seed in spring.
Seed Collection: Collect in Sep. and Oct.
Seed Treatment: Cold-moist stratification for 2 months.
Commercially Avail: yes

Find Seed or Plants

View propagation protocol from Native Plants Network.

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:									FAC

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Nueces River Authority - Uvalde, TX
Mt. Cuba Center - Hockessin, DE

Bibliography

Bibref 946 - Gardening with Prairie Plants: How to Create Beautiful Native Landscapes (2002) Wasowski, Sally
Bibref 1294 - The Midwestern Native Garden: Native Alternatives to Nonnative Flowers and Plants An Illustrated Guide (2011) Adelman, Charlotte and Schwartz, Bernard L.

Search More Titles in Bibliography

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Silphium integrifolium in USDA Plants
FNA: Find Silphium integrifolium in the Flora of North America (if available)
Google: Search Google for Silphium integrifolium

Metadata

Record Modified: 2023-01-16
Research By: TWC Staff

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