Ghost Fungus: the sequel

Omphalotus nidiformis at twilight
Omphalotus nidiformis at twilight. Click to enlarge.

Last year I wrote about the cluster of bioluminescent Ghost Fungus (Omphalotus nidiformis) growing on a dead tree in the backyard of the house where I live (see Glow-in-the-dark fungi). This year we had an exceptionally wet March creating great conditions for fungi of all sorts. And guess what — those ‘ghosts’ were back in droves! But strangely, I didn’t recognise them at first.

The first thing I noticed was a troop of little yellow buttons coming out of the wood, developing into brown funnel-shaped mushrooms with yellow gills. They were much darker than the white Omphalotus that grew on the same tree the previous year and I assumed I had a different species sending up fruiting bodies. (‘Fruiting body’ just means the visible, spore-producing part of any fungus, as opposed to the usually unseen network of filaments or mycelia beneath the surface.) I cut one of the caps off and tried to take a spore print, but hardly any spores came out onto the paper. It was just enough to see the spores were white.

O_nidiformis brown form 240317 0260

Several online sources mention a dark form of Omphalotus nidiformis, which doesn’t glow as brightly as the light form (ref. Miller, 1994). It dawned on me that’s what these might be. I turned off all the lights and went outside at night and sure enough, some of them glowed faintly. In addition, there were a few freshly emerged paler fruiting bodies that I hadn’t noticed in the daytime, luminescing brightly.

My work took me away from home for the next four days. When I returned, I was astonished to find the backyard had practically become a Ghost Fungus forest! The familiar white clusters had appeared around the bases of nine dead and living trees and they were starting to spread into next door’s backyard too. The brown ones had grown into 20-cm-wide caps with undulate margins and turned creamy white on the edges, though overall they were still darker than the ones which had since appeared.

At night the sight was magical. The luminescence jumped out the moment I turned the torch off and I felt myself quietly gasp in awe. I urged friends to drop by and see the display; they were as captivated as I was.

It’s hard to put into words why these dimly glowing shapes elicit such wonder. After all, compared to the bright lights in our cities and towns which most of us see daily, the light from a glowing mushroom is faint and insipid. But in the darkness of an unlit forest it’s utterly radical. There’s something about nature that heightens our senses.

Omphalotus_nidiformis_2017_4851

Omphalotus_nidiformis_2017_4873

Omphalotus nidiformis is poisonous, so don’t be tempted to eat it. Growing mostly on dead wood it can be found in damp forest environments of eastern and southern Australia, extending from Queensland to Tasmania and across to the south-west. Look for it low on tree trunks — the fan or funnel-shaped caps are usually quite distinctive in the daytime once you’re familiar with them. Notice also the branching gills, which extend down the stem. The caps can grow as large as 30cm across. But be aware they only last a few days, so don’t delay going back at night if you want see them at their luminous best. It’s also possible to see the glow by taking a piece into a completely dark room.

The mature caps glow 24 hours a day but you can only see this when there’s no other light. Oh, and don’t expect it to look green like the photos. Our eyes are poor at determining colour in low light situations, so we perceive the glow as white.

Below are a few extra photos showing the variation in form and colour by day. Who would have thought these are all the same species? Scroll down further for some more night shots. Please click the photos to enlarge.

Omphalotus nidiformis brown form 24 Mar 2017

Omphalotus nidiformis 4795

Omphalotus_nidiformis_2017_4872

Omphalotus_nidiformis_2017_4876

Photographic notes

Most of the night photos on this page are 30 second exposures at 800 ISO and the lens at its widest aperture. As this isn’t very wide on my gear I’ve brightened the images a little and removed some of the graininess in Photoshop but the colour hasn’t been altered.

Reference

Miller, Orson K. Jr. (1994). ‘Observations on the genus Omphalotus in Australia’. Mycologia Helvetica. 6 (2): 91–100.

Further reading

Hunting the Ghost Fungus: glowing mushrooms in Australia’s forests. An interesting short article published recently in the Guardian. Includes animated time-lapse photos showing the change from day to night. I even get a mention!


Finally, here’s another look at last year’s spectacular display (2016). Click the photo to see more and read about it.

O_nidiformis_4737

 

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13 thoughts on “Ghost Fungus: the sequel

    • Carol Probets 23 April 2017 / 11:15 pm

      Terrific, Robert…love the photos. And thanks for adding a link to mine!

      Like

  1. Sarah Maddox 24 April 2017 / 6:19 am

    Hallo Carol
    Those are beautiful. I’d never heard of glow-in-the-dark fungi before. Thanks for the photos!
    Cheers
    Sarah

    Liked by 1 person

  2. Liz Riley 24 April 2017 / 10:24 am

    Hi Carol,
    The white variant looks very like the edible oyster mushroom, maybe not so similar in real life. Lovely shots, bioluminescence is captivating.
    Liz

    Liked by 1 person

    • Carol Probets 24 April 2017 / 10:37 am

      Hi Liz, yes apparently people have been poisoned when they’ve mistaken it for an edible oyster mushroom. Fortunately it’s not lethal, just makes you very ill from what I’ve read!

      Like

  3. John French 24 April 2017 / 7:11 pm

    Great article – thankyou so much Carol. Fi & I were out at Mt Wilson last weekend – found some weird fungi during the day – checked ’em out at night – yep – white glow by eyesight. Didn’t have my tripod with me for any shots though. Cheers. John

    Liked by 1 person

    • Carol Probets 24 April 2017 / 9:22 pm

      Oh what a shame. I still remember those terrific photos you took of the ones in Megalong! Mt Wilson must be beautiful at the moment.

      Like

  4. craigboase 25 April 2017 / 11:59 am

    Hi Carol, stunning photos yet again! Want I’d love to know is how you get some of your luminescent photos so sharp and clear at night, especially as there’s no flash used? What camera setting did you use? Thanks
    Craig

    Like

    • Carol Probets 25 April 2017 / 12:22 pm

      Thanks Craig! I thought most of my night photos could be sharper but I’m glad they came across OK 😊 There’s a paragraph near the end about the camera settings but I’ll elaborate a bit more. Camera on tripod, manual setting. I used ISO 800 and 30 second exposure with aperture usually about 4 or 5.6. I don’t have a shutter release cable or remote so I set it on 2 second delay (but longer might be better), to reduce movement caused by pressing the button. I focussed manually using torchlight, then turn the torch off, press the button, and stand back. I used Photoshop Elements to tidy up all the dead pixels, adjusted levels to make the photo a bit brighter, reduced some of the graininess and sharpened it a little if necessary. Hope that helps!

      Like

  5. craigboase 25 April 2017 / 8:21 pm

    Thanks Carol, I was so entranced by the photos I must have missed that paragraph sorry. Thanks again.

    Liked by 1 person

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