Silphium gracile, Capitulum after anthesis, from above, with dry disk floret corollas. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium terebinthinaceum, Inflorescence from above. Family Asteraceae, Subclass Asteridae. Origin: ...
Silphium terebinthinaceum, Inflorescence from below and phyllaries. Family Asteraceae, Subclass Aste...
Silphium radula, mature head. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Capitulum after anthesis, from the side, with dry disk floret corollas. Family Ast...
Silphium gracile, Capitulum at anthesis, from above. Family Asteraceae, Subclass Asteridae. Origin: ...
Silphium gracile, Capitulum prior to anthesis with enclosing phyllaries. Family Asteraceae, Subclass...
Silphium gracile, Ray florets at anthesis. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Upper cauline leaves. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Developing fruit in place. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Fruit (winged achene). Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Capitulum at anthesis, from above, with inch worms. Family Asteraceae, Subclass As...
Silphium trifoliatum , Inflorescence past anthesis from below, phyllaries. Family Asteraceae, Subcla...
Silphium trifoliatum , Inflorescence well past anthesis from above. Family Asteraceae, Subclass Aste...
Silphium trifoliatum , Inflorescence past anthesis from above. Family Asteraceae, Subclass Asteridae...
Silphium trifoliatum , Inflorescence at anthesis from above. Family Asteraceae, Subclass Asteridae. ...
Silphium terebinthinaceum, Inflorescence from above. Family Asteraceae, Subclass Asteridae. Origin: ...
Silphium terebinthinaceum, Inflorescence from below and phyllaries. Family Asteraceae, Subclass Aste...
Silphium radula, mature head. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Capitulum after anthesis, from the side, with dry disk floret corollas. Family Ast...
Silphium gracile, Capitulum at anthesis, from above. Family Asteraceae, Subclass Asteridae. Origin: ...
Silphium gracile, Capitulum prior to anthesis with enclosing phyllaries. Family Asteraceae, Subclass...
Silphium gracile, Ray florets at anthesis. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Upper cauline leaves. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Developing fruit in place. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Fruit (winged achene). Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium gracile, Capitulum at anthesis, from above, with inch worms. Family Asteraceae, Subclass As...
Silphium trifoliatum , Inflorescence past anthesis from below, phyllaries. Family Asteraceae, Subcla...
Silphium trifoliatum , Inflorescence well past anthesis from above. Family Asteraceae, Subclass Aste...
Silphium trifoliatum , Inflorescence past anthesis from above. Family Asteraceae, Subclass Asteridae...
Silphium trifoliatum , Inflorescence at anthesis from above. Family Asteraceae, Subclass Asteridae. ...
Silphium terebinthinaceum, Inflorescence from above. Family Asteraceae, Subclass Asteridae. Origin: ...
Silphium terebinthinaceum, Inflorescence from below and phyllaries. Family Asteraceae, Subclass Aste...
Silphium radula, mature head. Family Asteraceae, Subclass Asteridae. Origin: Native