Summary description from Wikipedia:

Silphium gracile in languages:

English

Slender Rosinweed

English

Simpson Rosinweed

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Parent Taxon

• Silphium

Sibling Taxa

• Silphium albiflorum
• Silphium asperrimum
• Silphium asteriscus
• Silphium brachiatum
• Silphium compositum
• Silphium confertifolium
• Silphium glutinosum
• Silphium gracile
• Silphium integrifolium
• Silphium laciniatum
• Silphium laciniatum × terebinthinaceum
• Silphium mohrii
• Silphium perfoliatum
• Silphium perplexum
• Silphium pinnatifidum
• Silphium radula
• Silphium terebinthinaceum
• Silphium wasiotense

Top Observation Places

• League City
• Alief
• Missouri City