Silphium terebinthinaceum

     Prairie Dock

Asteraceae

  Fruit Type:  Achene

  Fruiting Period:  Oct

  Flowering Period:  early Jul - early Sep

  Color:  Light brown

  Size:  7 x 11 mm

  Shape:  Obovate with notch, flattened

  Surface Features:  Longitudinal ribs

  Scarification:  Not required

  Stratification:  30 days

  Cotyledons:  Oval with entire margins; midvein, large and fleshy

  Leaf arrangement:  Basal

  Leaves:  Simple, oval, petiole, entire margins, prominent midvein