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There is a page named "Silphium trifoliatum" on Wikipedia
Silphium trifoliatum, commonly known as whorled rosinweed, is a species of flowering plant in the family Asteraceae. It is native to the eastern United...2 KB (200 words) - 17:03, 18 July 2022
Silphium trifoliatum L. – whorled rosinweed – AL GA IN KY MD NC SC OH PA VA WV Silphium wasiotense M.Medley – Appalachian rosinweed – KY TN Silphium integrifolium...7 KB (641 words) - 05:49, 19 August 2024
Silphium asteriscus var. trifoliatum - widespread; similar to the above but with narrow whorled leaves Line drawing of Silphium asteriscus "Silphium"...3 KB (307 words) - 09:51, 7 July 2024
terebinthinaceum var. terebinthinaceum (N) Silphium trifoliatum var. latifolium (N) Silphium trifoliatum var. trifoliatum (N) Silybum marianum (I) Sinapis alba...135 KB (11,542 words) - 02:10, 27 May 2024- terebinthinaceum var. terebinthinaceum (N) Silphium trifoliatum var. latifolium (N) Silphium trifoliatum var. trifoliatum (N) Silybum marianum (I) Sinapis alba...137 KB (11,737 words) - 13:45, 20 January 2024
- yellow pimpernel Thaspium barbinode — hairyjoint meadow-parsnip Thaspium trifoliatum — purple meadow-parsnip Yabea microcarpa — California hedge-parsley Zizia...40 KB (3,083 words) - 01:25, 16 November 2023
- namely in Echinops Ritro, where they are correctly placed, and in Silphium trifoliatum, where, though only five vessels are visible, they are erroneously
- FNA NatureServe BONAP Images Wikispecies Silphium asteriscus var. trifoliatum S. trifoliatum var. trifoliatum Whorled rosinweed Introduced, N. America