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Helianthus grosseserratus

 

     Sawtooth Sunflower

Asteraceae

 

 

 

 

 

 

Fruits.

  Fruit Type:  Achene

  Fruiting Period:  Oct - Nov

  Flowering Period:  Aug - Oct

      

 

 
Seeds.

  Color:  Brown

  Size:  2 x 4 mm

  Shape:  Quadrangular

  Surface Features:  Short-toothed crown; mottled with longitudinal ribs

  Scarification:  Not required

  Stratification:  Not required

 

 

Seedlings.

  Cotyledons:  Oval with entire margins

  Leaf arrangement:  Opposite

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