ONH

  • 5427
  • 5469_2
  • 2005
  • 5179
  • 1030720
  • 1220855
  • 1230563
  • 5472
  • 5187
  • 5254
  • 6850
  • 6858
  • 8034
  • 5427
    1 - Naked Broomrape Orobanche uniflora.

    08/01/2011 Blue Mountain/Deer Park, Olympic National Park

  • 5469_2
    2 - Naked Broomrape.

    08/01/2011 Blue Mountain/Deer Park, Olympic National Park

  • 2005
    3 - Naked Broomrape, less common yellow flowers.

    07/26/2009 Sunrise Ridge Trail, Olympic National Park, Washington

  • 5179
    4 - Naked Broomrape.

    07/28/2011 Obstruction Point Road, Olympic National Park, Washington

  • 1030720
    5 - Naked Broomrape.

    07/11/2012 Sunrise Ridge Trail, Olympic National Park, Washington

  • 1220855
    6 - Naked Broomrape.

    06/21/2014 Sunrise Ridge Trail, Olympic National Park, Washington

  • 1230563
    7 - Naked Broomrape.

    06/30/2014 Obstruction Point Road near the Cox Valley Trailhead, Olympic National Park, Washington

  • 5472
    8 - Naked Broomrape in a typical environment with Phlox and Olympic Onion.

    08/01/2011 Blue Mountain/Deer Park, Olympic National Park

  • 5187
    9 - Naked Broomrape flower stem has no leaves.

    07/28/2011 Obstruction Point Road, Olympic National Park, Washington

  • 5254
    10 - Naked Broomrape flower stem, underground portion.

    07/30/2011 Hurricane Hill Area, Olympic National Park, Washington

  • 6850
    11 - Naked Broomrape dried flower.

    08/19/2011 Blue Mountain/Deer Park, Olympic National Park

  • 6858
    12 - Naked Broomrape dried flower.

    08/19/2011 Blue Mountain/Deer Park, Olympic National Park

  • 8034
    13 - Naked Broomrape dried seed.

    09/11/2011 Sunrise Ridge Trail, Olympic National Park, Washington

Naked Broomrape, Orobanche uniflora, in the family Orobanchaceae, is a small, hairy, parasitic plant with one (occasionly two or three) yellow or purple flowers but no leaves.

Most members of the Orobanchaceae are plant root parasites, and the completely parasitic species lack chlorophyll. Some species are serious crop parasites.

In the Olympics, we have observed Naked Broomrape at 5,000 - 6,000 feet elevation in the Hurricane Ridge area and on Blue Mountain, Olympic National Park, WA.

Later in the summer, the flowers dry and seeds form.