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Green Landscaping: Greenacres

Native Plants of the Great Lakes

North Branch Restoration Project Seed Book

Silphium Integrifolium / Family: Asteraceae
Rosin Weed, Swink/Wilhelm # 5

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FLOWERING: July - September

SEED TIMING: Mid-September to mid-October

HABITAT: Prairies

DIAGNOSTIC FEATURES: 2 - 6 feet. Sunflower like flowers. Large, coarse plants with rough, stalkless, paired leaves, with or without teeth.

TO PICK: Sunflower-like seeds form in rays only. Turn dry and brown when ripe. Best to pick at earlier stage since it is eaten perhaps by deer. Pick entire head.


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