Plants immune to honey fungus?

I am not familiar with this fungus. Can you tell me more about it?

plants resistant to honey fungus are; ash, bamboo, beech, box, catalpa, cercis, chaenomeles, clematis,,cotinus, eleagnus, fothergilla, holly, ivy, kerria, laurel, mahonia, , pieris, sumach and yew. but it is important to keep them in good condition, as the fungus attacks any plant that is weak, so compost, mulch and feed well! good luck!

I don't know where you got your list from, Hoya, but its not quite the same as from my RHS information. According to the RHS, plants which have shown a degree of resistance to honey fungus (and that's the best you can hope for, by the way, no woody plant is totally immune) are as above with the exception of Mahonia and Laurel (either Aucuba or Prunus), and extra ones on my list which show resistance are Oak, Mallow, Choisya, passiflora, pittosporum, carpenteria.
Growing soft stemmed plants such as Phormium and perennials should be fine, they are usually unaffected.