Simon Walker's picture

Trifid Bur-marigold

Observed: 30th July 2012 By: Simon WalkerSimon Walker’s reputation in PlantsSimon Walker’s reputation in PlantsSimon Walker’s reputation in PlantsSimon Walker’s reputation in Plants
Unknown plant 2, Old Warden Quarries, 2012-07-30 001 reduced
Unknown plant 2, Old Warden Quarries, 2012-07-30 002 reduced
Species interactions

No interactions present.

Species with which Common Figwort (Scrophularia nodosa) interacts


ophrys's picture


The three lobed leaves with coarse teeth reminds me of Trifid Bur-marigold, but there is no indication of size and it's not a plant I have seen for many years. Any thoughts on that?


My Flickr photos...

Simon Walker's picture

It was a little over a foot tall

There abouts, anyway. I considered figwort, but it looked wrong. I ended up baffled!


lavateraguy's picture

square stalks

I interpreted the photographs as showing square stalks. If that's the case then it won't be Bidens.

If that's a misinterpretation it isn't Scrophularia, and I don't know what it is.

Simon Walker's picture

I've added another picture...

...and one of the others at full size. Perhaps these might help.


lavateraguy's picture

Don't know what it is

The appearance of a figwort goes away with the larger images. That leaves me baffled as well.

I do see the occasional Bidens, mostly along canal banks, but I'm not recognising this as that. (Perhaps it's just the immaturity that's fooling me.)

cicuta58's picture


It looks as though the top of the plant is suffering from some kind of gall. If it is not square-stalked, then Bidens tripartita is the most likely. Very tricky!


Simon Walker's picture

I'm Glad...

...that it's not just me who was puzzled. I've looked at a few images of Trifid Bur-marigold now and that does indeed look the most likely. Thanks, all.