Log in / Register
Plant ID

Plant ID Forum

Last week a contractor brought in this plant sample and expressed concern it was invading a local wetland. He said it was going in the mud at the end of a shallow pool and had spread over a fairly large area. Any thoughts on what it might be? Thanks! Steve

Unknown Plant 8-1-2013


14 thoughts on “Potential Wetland Invasive?

  1. Karl Anderson said:

    Honestly, no, I dont know what this is. No flowers or fruit, not even sure if its a herb or some kind of woody plant. Big leaf. Not much to go on. My first thought was a terrestrial form of Trapa natans, just based on the habitat description, but I can’t find any reference to such a form of that species. Somehow, I think this is a shrub or a thicket of stems of some woody species, but what? I’ll keep looking. In the meantime, some additional info would be helpful. If it really is invasive in a wetland it would be good to know about.

    Karl A.

  2. Thanks Karl. I’ll try to collect some additional samples and will post here when I do.

    Steve H.

  3. Karl Anderson said:

    Hmm. You know, this just might be marsh marigold, Caltha palustris. Leaves seem a bit pointed for that species, but late-season leaves often do differ from what you see in the springtime. Should be some remnants of fruit someplace. That white underside on the leaf would be a useful clue – if one could ever find a description of any plant that includes the underside of the leaf.

    Karl A.

  4. mesicforest said:

    Check out a plant called Petasites Albus and see if you find a resemblance. It is native to Europe.

  5. Karl Anderson said:

    Hmm. I have seen that plant species a couple of times. Seems to me that the stem on that one is rather thick and fleshy, not thin and wiry like the specimen. But that’s a good thought, I’ll hold on to it. Lets see if Steve can find some additional material. Many thanks for writing in! I would like to have more such input from all you folks out there.

    Karl A.

  6. Karl Anderson said:

    Is there anybody out there who has a patch of marsh marigold and could check the color of the underside of the leaf? I think I’ve looked at a hundred photos and none show this feature..

    Karl A.

  7. mesicforest said:

    The Marsh Marigold that I have here Karl looks nothing like that plant, from the leaf flesh tone, to the texture. I will include a spring picture if I am able to upload it. Also, when that picture was posted, MM tends to be asleep with very little plant growth showing until next spring.

  8. mesicforest said:

    Karl check out Tussilago Farfara…Coltsfoot!! Then look at the USDA plant website…it shows it in NJ.

    Part of me wants to shout out Bingo! Unfortunately NOT native

  9. Karl Anderson said:

    Definitely a possibility. I don’t see that plant in South Jersey, I only know one site, in Brendan Byrne SF. Seems to me that coltsfoot petioles are gray-fuzzy, no? Or does that fuzz wear off?

    Karl A.

  10. mesicforest said:

    Karl I am not sure if you were able to look at my link on Flicker, but I posted 8 photos of Coltsfoot on there, that made me key in on the plant. It definitely shows that underside color of the leaf. The USDA plant website shows Tussilago in 11 of our 21 counties virtually from Ocean County up to the northern most part of the state. Wish I could help more…

  11. Gentlemen, I think we have a winner. From the photos, my specimen looks just like Coltsfoot. USDA’s Plants database shows it as occurring in Morris Co. I’ll try to find a flower next spring for confirmation but I’m pretty confident of the ID. While not native, it doesn’t appear to be invasive. Thanks for your help, Steve

  12. Karl Anderson said:

    If you are happy I am happy. It was good to get some dialogue on one of these plants. Many thanks.

    Karl A.

  13. Carly said:

    Coltsfoot! fabric-ie soft white under the leaf, distinct veins and a tendency to creep about!

Leave a Reply