Pickerelweed Pontederia chordata Location: Kenilworth Aquatic Gardens, Washington, DC Year: 2006 Merckslides catalogue number: 05-23012 Comments:

Pickerelweed Pontederia chordata Location: National Botanical Gardens, Washington, DC Year: 2009 Merckdigitals catalogue number: 05-72295 Comments:

Pickerelweed Pontederia chordata Location: National Botanical Gardens, Washington, DC Year: 2009 Merckdigitals catalogue number: 05-72297 Comments:

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