Asteraceae

Carolina rosinweed

Silphium compositum

Other Common Names

kidney-leaf rosinweed

Plant Type

Herbaceous Wildflower

Life Cycle

Perennial

Typical Size

2-8 ft. tall
2-4 ft. wide

Tolerant of

Drought

Inolerant of

Poorly Drained Soil

Propagation

By seed

Plant Propagation Notes

Self-seeds readily.

Plant Planting Notes

Develops long taproot that does not easily transplant.

Plants/Diseases

No significant disease or pest issues.

Wildlife Benefits

Nectar/pollen source for pollinating insects, Fruit/seeds for birds

Leaves

Leaves alternate, simple and kidney-shaped with lobes and distinctive red/purple leaf veins.

Flowers

Flowers are heads with 7-20 bright yellow ray flowers.

Fruit

Achene.

Toxicity

No know toxicity.

Silphium compositum

USDA Hardiness Zones

7, 8, 9

Light Exposure

Full Sun, Part Sun/Shade

Soil Moisture

Medium

Soil Drainage

Well-drained

Soil pH

Acidic (less than 6.0), Neutral (6.0-8.0), Basic (greater than 8.0)

Native in South Carolina?

Yes

Plant Native Habitat

Dry forests, woodlands, road banks, and longleaf pine sandhills.

Global Conservation Status (NatureServe)

Secure (G5)

Federal Conservation Status (USFWS)

Not Listed

Distribution Notes

Common throughout South Carolina.

Subspecies

Silphium compositum var. compositum

Silphium compositum var. ovatifolium

Silphium compositum var. venosum