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Wasowski, Sally and Andy
Silphium terebinthinaceum Jacq.
Prairie rosinweed, Prairie dock
USDA Symbol: SITE
USDA Native Status: Native to U.S.
Very large, wide, spade-shaped basal leaves subtend a 3-8 ft. flowering stalk. Bright yellow, composite flower are numerous on older plants.
The common name for Silphium is rosinweed due to the copious resin exuded from injured parts of the plant. Prairie youngsters use the resin for chewing gum. It tastes like carrots and pine. (Lamb/Rhynard)
Plant Characteristics
Duration: Perennial Habit: Herb Flower:
Fruit: Size Class: 3-6 ft.
Bloom Information
Bloom Color: Yellow
Bloom Time: Jul , Aug , Sep
Distribution
USA: AL , AR , DC , GA , IA , IL , IN , KY , MI , MO , MS , NC , OH , SC , TN , VA , WI , WV
Canada: ON Native Distribution: S. Ont. & OH to MN, s. to SC, MS & AR
Native Habitat: Prairies; woodland borders; old fields
USDA Native Status: L48(N), CAN(N) Growing Conditions
Light Requirement: Sun
Soil Moisture: Moist , Wet
Soil Description: Wet to mesic soils.
Conditions Comments: Not Available
Benefit
Use Other: The common name for Silphium is
osinweed due to the copious resin exuded from injured parts of the plant. Prairie youngsters use the resin for chewing gum. It tastes like carrots and pine. (Lamb/Rhynard)
Attracts: Birds
Propagation
Description: Propagate by sowing seed sowing unstratified seed in fall or stratified seed in spring. If producing transplants, sow seed late in the season as the rapid
taproot growth will enable transplanting in fall or early spring.
Seed Collection: Collect in Sep. and Oct.
Seed Treatment: Moist stratification for 10 days.
Commercially Avail: yes
From the National Suppliers Directory
According to the inventory provided by Associate Suppliers, this plant is available at the following locations:
Ohio Prairie Nursery - Hiram, OH
Prairie Nursery - Westfield, WI
Recommended Species Lists
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Metadata
Record Modified: 2012-12-09
Research By: TWC Staff
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