Myriophyllum simulans

Water Milfoil at Dry Plain, NSW

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Myriophyllum simulans JaneR 6 Jun 2023
Myriophyllum simulans AndyRoo 5 Jun 2023

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User's notes

GPSed. Best guess based on leaves with fine segments or teeth. Again not sure how to ascribe abundance - would it be one plant?

4 comments

   6 Jun 2023
a tough call to make a species ID (M. simulans or M. variifolium) based on this photo which has relatively few details. Ideally, it would be good to know: whether emergent leaves are all whorled, and their typical number; length & width of submerged leaves; details about shape and colour of mericarps and styles. However, ideal details are rare and easiest to determine on a live specimen.
I'm confirming this as M. simulans based on the pinnae of the submerged leaves and the whorl number: but note that leaves are very plastic in Myriophyllum.

The leaves on the emergent tip on the right in the main photo are unusual (entire, flat, red margins) and not consistent with M. simulans or M.variifolium: possibly this is a cold or short-day response. The other tip in the main photo is more typical for both these two milfoils.

All up, interesting !
   8 Jun 2023
I've added a few more pics including a cropped version of the second pic zooming in on one of the emergent parts which might help (or not).
   8 Jun 2023
thanks for that. The plant is at an awkward growth stage; the most informative photos would be to repeat in spring-summer hen flowering and growing.
   8 Jun 2023
OK thanks Jane. Assume one of us will get around to doing that this coming spring-summer.

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Location information

Sighting information

  • At least 1 Abundance
  • 6 Dec 2020 11:49 AM Recorded on
  • AndyRoo Recorded by
  • Less than 10cm Plant height
  • Yes In flower

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