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Photographer: Paul Drobot
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Family Asteraceae
Silphium terebinthinaceum Jacq. var. terebinthinaceum
basal-leaved rosinweed, prairie-dock, prairie rosinweed
Silphium: old Greek generic name referring to resinous juice
terebinthinaceum: like turpentine
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| Status: | Native |
| Plant: | erect, perennial, 2'-10' tall forb; stems mostly leafless and smooth |
| Flower: | head 2"- 3 1/2" wide with about 13-21 yellow rays 3/4"-1" long, disk 1/2"- 1 1/2" wide; inflorescence of several to many heads in an open, branched cluster; blooms July-Sept. |
| Leaf: | all large, basal, long stalked, rough, un-lobed but toothed, with a wide, heart-shaped base |
| Habitat: | full sun; moderate moisture to wet; prairies; in sandy, loamy soil |
| (Glossary) |
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