bannerimage.jpg

Home | Mushrooms | DVD's. | N.S.Mushroom Foray's. | Wildflowers | What's That? | Geology of Nova Scotia. | N.S.Links.

Amanita.

When I first became interested in mushrooms over 30 years ago there were two genera that very quickly aroused my curiousity and imagination. One was the boletes and the other was the amanita's. The former having many fine edibles, amongst them the King bolete,Boletus edulis. The latter having some of the deadliest mushrooms in North America. Over the years their allure has not faded and I still find myself in a state of expectation whenever I venture in to the woods, hoping that I will find a species that I haven't seen before.
Because amanita's are responsible for approximately 80% of the fatalities from mushroom poisoning in North America it follows that it is probably a good idea to be able to recognise them in the field :-) But where do we start?
The Volva.
The volva is a cup or sac around the base of the stalk and is what remains of the universal veil.The universal veil is a membrane that envelops and protects  the immature mushroom prior to eruption and elongation of the stalk and expansion of the cap.
 The three photographs (below) show Amanita virosa in various stages of eruption. From the left is the "egg" with the volva well formed at the base and the cap as yet, still not expanded. The centre photograph shows a mature mushroom along with an egg (for scale).On the right is shown an egg that has been cut longitudinally to show the stalk and gills covered(almost) by the membrane. 

Destroying Angel, Amanita virosa.
destroyingangelamanitavirosa1.jpg

Destroying Angel, Amanita virosa.
destroyingangelamanitavirosa2.jpg

A.virosa egg cut longitudinally.
destroyingangelamanitavirosa3.jpg

With warts/patches.
wartspatches1.jpg

Friable.
friable1.jpg

In some species of amanita the volva is not as well defined as with A.virosa. Depending on the species a volva may be described as being cup like,saclike,with scales, indistinct or of a crumbly appearance(friable) see photograph above at right. The volva is an important characteristic when trying to identify to species,see photographs below, for examples. In addition, with some species they will also have a partial veil and this manifests itself by leaving a ring or "annulus" at some point on the stalk,this is what's left of the membrane that covered the immature gills.As the cap expands the membrane ruptures breaking free from the periphery(margin) of the cap and adhering to the stalk leaving material behind in the form of a ring, as can be seen in the mature mushroom in centre photograph (above). In some amanita parts of the universal veil are carried up on to the top of the cap and these deposits can variously be described as warts or patches,see photograph above at left. These deposits are also helpful in determining to species, unfortunately they are easily removeable and are often washed off by rain.

Saclike.
saclike.jpg

Indistinct.
indistinct.jpg

Cuplike.
cuplike1.jpg

Scaly.
scaly.jpg

Striations.
striations.jpg

Appendiculate,not easy to see on this photo.
appendiculate.jpg

The cap.

All mushrooms are subject to the elements and this can effect the colouring of the mushroom,particularly the cap(pileus).Be aware that there will be some variability when attempting to identify to species. In almost all cases the gills will be free of the stalk, but there are exceptions. As previously noted elsewhere on this page patches or warts on the cap may help identify to species. Also of importance is whether the cap has striations or whether it has remnants of the partial veil(appendiculate) hanging from the margin. Striations are radial lines,much the same as the spokes of a bycycle that radiate from the margin and go some way towards the centre of the cap.In my experience mushrooms with striations are much more common than mushrooms that have remnants of the partial veil hanging from the margin.Mushrooms that I have found that have striations on the cap are; A.muscaria,A.ceciliae,A.vaginata and A.fulva. On the other hand finding mushrooms with appendiculate on the margin is much more difficult. The only one I have ever found was in September of 2007,Amanita wellsii. This mushroom is a rare find in Nova Scotia. 

To my knowledge there are three other mushrooms in Nova Scotia that leave remnants of the partial veil on the margin they are; A.atkinsoniana,A.chlorinosma and A.onusta. I have not seen any of these three in Nova Scotia so my assumption is that they must be very rare. If you find any of these three I would be very interested to hear about your find.

Spore print.

The spore print of all amanita's is cream to white.The gills will also be of a similar colour.

Amanita's known to grow in Nova Scotia.

Below is a list of Amanita's that are known to grow in Nova Scotia. There may be many more that have yet to be found and documented. If you should find one that isn't on the list I would be interested to learn about it. 

Amanita atkinsoniana.

Amanita baccata.

Amanita bisporigera.
Amanita brunnescens.

Amanita ceciliae.

Amanita chlorinosma.
Amanita citrina.
Amanita excelsa.
Amanita farinosa.

Amanita flavoconia.

Amanita flavorubens.
Amanita frostiana.
Amanita fulva.
Amanita gemmata.

Amanita macrospora.

Amanita muscaria.
Amanita onusta.
Amanita parcivolvata.
Amanita peckiana.

Amanita porphyria.

Amanita rubescens.
Amanita solaniolens.
Amanita solitaria.
Amanita strangulata.

Amanita umbonata.

Amanita vaginata.
Amanita verna.
Amanita virosa.
Amanita wellsii.
 
 
         



Please get in touch to offer comments and suggestions.
You can e-mail me by clicking here.
*********************************************
All photographs on this site have been taken by myself and are copyright. Copying images from this site is illegal.
**********************************************