Tuesday, 11 June 2019

Agrocybe rivulosa - Wrinkled Field Cap Mushroom

Agrocybe rivulosa - Wrinkled Field Cap Mushroom

I found this lovely specimen at University Park, Nottingham where over the years have found many interesting and unusual mushrooms.  Behind the Boat House was a huge pile of bark chippings.  I always tend to investigate such 'piles' whether it be dung or chippings and there found a mushroom with a wrinkled cap. I'd not seen one quite like this.

On returning home I spent several hours searching for it in my various books and it did not feature.  After much searching on the internet I thought it might be Agrocybe rivulosa.  I sent some of my photographs to my friend Howard retired Recorder for Nottinghamshire Fungi Group and he confirmed it to be the case.

Thanks to M for driving me to the University Park in the rain so that I could get some more photographs.

Here is some background to this mushroom.

The first recorded sighting of this mushroom was in 2003 by a 
Dutch mycologist Marijke M. Nauta (source Wikipedia).  The first recording in the UK was in 2004.  It has since become quite common in Southern England due to the process of mulching flowerbeds which has caused its spreading. It is common in Holland, and mainland Europe. 

Also been recorded occasionally in Wales and Scotland.  Rivulosa refers to the wrinkled grooves like rivulets in the cap. Source First Nature.


The cap can reach a diameter of up to 10 cm.  The colour of the cap can vary from clay/yellow to pale orange-brown.  The gills are cream initially then turning grey.  The stem is fibrous and hollow, white turning pale ochre/grey with a large pendulous ring.  Chemical smell.  To been seen June - October on mulch and bark chippings.

Showing the wrinkled grooves in the cap.

Showing large pendulous ring.

Showing fibrous stem and base.

N.B. please note on the day the photographs were taken this mushroom was covered in small black insects.

Monday, 13 May 2019

Peziza badia - Bay Cup found in a skip

Peziza badia - Bay Cup

It never ceases to amaze me where fungus can end up growing!

Who'd have thought in a skip! The story behind this is as follows:

A lady was having her garden landscaped.  Old wood and debris was placed in the skip along with clumps of soil removed for the creation of a new path.  The lady concerned left a card through my letterbox telling me she'd seen a fungus in her hired skip.  Intrigued I had to investigate so off I travelled to take a look.  To my surprise the fungus in question turned out to be a Bay Cup. Perfect in every way - the colouring and the scurfy exterior.

Below are photographs showing this excellent example.

Showing a perspective angle in the clump of soil

Showing the scurfy exterior
Characteristics: 3-8 cm across, cup-shaped firstly then developing a wavy margin edge that is irregular in shape.   Inner surface shiny, brown with olive tinge with the outer edge being scurfy.  To be found in soil, in clay soil on banks or path edges.  Later Summer to Autumn.  Frequent.

I visited the lady who found this fungus and indeed the soil was removed from a clay path and then placed in the skip!  Sometime after this soil removal the Peziza badia appeared.

Monday, 4 March 2019

Panaeolus semiovatus - Egghead Mottlegill - revisited

Panaeolus semiovatus - Egghead Mottlegill

I wrote a post about the Egghead Mottlegill in 2013.  I was in Angus Scotland and it was my first sighting.  I was struck by its simple beauty - clay coloured, the egg-shaped cap and the shiny, somewhat, creased texture.  This mushroom is usually found in or near dung.  This past weekend I was out walking and came across some superb examples of this mushroom and this time in England rather than Scotland!  In this post I have included some photographs below of it growing in its various stages.

Showing young emerging - greasy texture

Showing dry texture

Showing maturity and black spores

Friday, 8 February 2019

Crucibulum laeve - Common Bird's Nest

Crucibulum  laeve - Common Bird's Nest

A fungus belonging to the family of Nidulariaceae.  These usually grow on dung, wood or other plant material with a tendency to grow in large groups. Bowl-like structure usually less than 1 cm in diameter.  The bowl has at maturity tiny hard seed like peridioles. About 5 in the genera.

This fungus is difficult to find and is therefore easily overlooked. I found it by chance as I had paused during a conversation and just happened to be staring at the ground.  It was growing on chip bark in a flower bed at the University Park Campus, Nottinghamshire.

The fruit body is up to 12 mm across and 15 mm tall.  Bowl shaped.  The outer texture is felty and greyish/dull yellow.  The inner bowl is silver/grey and smooth. At maturity it contains several minute 'eggs'.  Firstly is it covered in a membrane which peels away to reveal the 'eggs'.  Mealy sweet smell.
This example found on bark chippings in a group of 30 or so.
To me they looked like minute Yorkshire puddings though some books describe them as tiny souffles!
I was thrilled to have come across it as it was my first sighting.

Showing membrane covering the eggs
Showing group on bark chippings

Showing 'nest' structure with eggs