Please help me to identify the seed. I attach the image of the pod. It was found near the ocean's beach in Boston. I would appreciate any input.

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  • That thing is pretty cool looking - had you not identified it as a plant or pod, I would almost think it could be a very bitey fossilized specimen!
    – PhasedOut
    Commented Mar 17, 2017 at 19:43

1 Answer 1


These are seeds from Trapa natans or "Water Caltrop" or "European Water Chestnut". You're good at finding invasive plant seeds! :)

enter image description here

  • 1
    Oooh, sorry Brenn, you must have posted while I was faffing about selecting a good image online...
    – Bamboo
    Commented Mar 17, 2017 at 15:02
  • 1
    No worries! You get my vote! ;)
    – Brenn
    Commented Mar 17, 2017 at 15:04
  • You got mine, but I'm probably gonna delete my answer...
    – Bamboo
    Commented Mar 17, 2017 at 15:05
  • Wow, Brenn, thank you! You seem to know 'em all:))
    – bespalex
    Commented Mar 17, 2017 at 15:30
  • This Brenn was RAISED in a family of gardeners and his home was a greenhouse (grins) and nursery!!
    – stormy
    Commented Mar 17, 2017 at 17:12

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