Bidens aristosa

     Swamp Marigold

Asteraceae

  Fruit Type:  Achene

  Fruiting Period:  Aug - Oct

  Flowering Period:  Aug - Sep

  Color:  Brown

  Size:  3 x 5 mm

  Shape:  Obovate; flattened

  Surface Features:  2-4 barbed awns; wart-like protuberances; central rib; barbed margins

  Scarification:  Required

  Stratification:  30 days

  Cotyledons:  Oval with entire margins

  Leaf arrangement:  Opposite

  Leaves:  Simple, forked irregular, petioles, dissected margins, prominent midvein