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Silphium integrifolium
Also called Rosinweed, Whole Leaf Rosinweed, Whole Leaved Rosinweed, Prairie Rosinweed
A tall, clump-forming native perennial daisy from eastern North America, grown in gardens and prairie plantings. It is easy to grow in full sun and tolerates dry conditions once established; the main limit is its height, so give it room.
Silphium integrifolium is a species of flowering plant in the family Asteraceae. Its common names include rosinweed, whole-leaf rosinweed, entire-leaf rosinweed, prairie rosinweed, and silflower. It is native to eastern North America, including Ontario in Canada and the eastern and central United States as far west as New Mexico.
The foliage of the plant is eaten by herbivores such as the white-tailed deer and the blister beetle Epicauta fabricius. Plants have also been noted to lose approximately 17% of their fruits to lepidopteran larvae. The most common herbivorous insect on this species is the gall wasp Antistrophus silphii. The wasp injects its eggs into the apical meristem of the plant, and as its larvae develop, a spherical gall up to 4 cm (1+1⁄2 in) wide forms in the meristem. This stops the shoot from growing. Up to 30 larvae overwinter in each gall, pupate, and emerge as adult wasps the following season. It is reported to be a host and nectar plant for many species of bees, butterflies, and moths.
The plant had uses among Native American peoples. The Meskwaki, for example, used the roots to treat pain from injuries.
Text excerpted from the Wikipedia article Silphium integrifolium by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
