Thursday, 27 April 2017

Habrodon at Merthyr Mawr

I was at Merthyr Mawr today for a site meeting with Duncan Ludlow, and having mentioned Habrodon perpusillus while we were chatting in the car park Duncan offered to show me the sycamore which hosts this rare moss. Despite Duncan leading me to the exact multi-trunked tree I couldn't spot it, but I nipped back afterwards for another look and found numerous small patches on one of the trunks (circled yellow in photo below).

I was struck by the superficial similarity to young Cryphaea, as Sam and Barry have commented previously.

The good news is that Duncan has removed the Holm Oak that was shading the host tree, and plans to fell further Holm Oaks slightly further away. Hopefully this will allow enough light onto the sycamore trunk for the Habrodon to persist.


  1. I guess it must be on other trees too, so now your eye in ;-)
    Did you ask Duncan about Leptodon?

  2. Duncan has now sent me Sam's 2008 report on Habrodon at MM. Sam checked all the trees in the area around the car park and only found it on three sycamores growing together at the base of the 'big dipper'; the trunk which I found it on had the most patches. So it is very localised at the site - but you're right, it is useful to have got my eye in a bit for this species, as I now feel a bit more confident that I might spot it at other sites if it is present (Porthkerry would seem worthy of a search).

  3. Good luck, I'm always hopeful it will be found on Gower...