Silphium radula Clarence A. Rechenthin @ USDA-NRCS PLANTS Database From http://plants.usda.gov/java/profile?symbol=SIRA2&photoID=sira2_002_ahp.tif...
DescriptionSilphium radula Arkansas.jpg English: Photographed in Hempstead County, Arkansas Date 12 June 2021, 11:09:15 Source Own work Author Eric Hunt...
DescriptionSilphium radula Texas.jpg English: Silphium radula, in an open area at the base of a north-facing wooded bluff along the South Fork of the Guadalupe...
DescriptionSilphium radula - 52974716489.jpg English: Roughstem rosinweed, Winston 8 Ranch Tree Farm, Nacogdoches, Nacogdoches County, May 2023 Date 20...
DescriptionSilphium radula - 52974984165.jpg English: Roughstem rosinweed, Winston 8 Ranch Tree Farm, Nacogdoches, Nacogdoches County, May 2023 Date 20...
com/photos/carthamus/52974720764/ operator: Flickr URL: https://live.staticflickr.com/65535/52974720764_1b579de94a_o.jpg determination method: SHA-1...
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