By Cammomile
west sussex,
United Kingdom 
I have a small Azalea, or Rhododendron whatever they are called nowadays, which is bi-coloured, dark pink and white on the same plant. Now that it has finished flowering, the seed heads have changed into Esther strange toadstool like furry growths. Is this called fascination or something else? The leaf is growing out of the growth in the second picture.
8 Jun, 2018
Answers
Thanks Bulba, it is totally infested then on every flower head.
8 Jun, 2018
See this web page for further information.
8 Jun, 2018
https://www.rhs.org.uk/advice/profile?PID=740
Sorry, I don't know what happened with the previous response.
8 Jun, 2018
That's very interesting. So it's fungal? Great to know how to deal with it thanks.
8 Jun, 2018
That is a gall, the house of some insect larva. The growth is attached to the leaf and would have been created by the bug drawing sap from the plant.
8 Jun, 2018