New DNA sequencing results in new Latin names for Wood Ear, Ringless Honey and Velvet Shank,Enoki mushrooms

As some of you may already know, the fungi kingdom has been the target of an historic effort by the scientific community to analyze DNA and properly categorize fungi. Before DNA analysis, identification was based solely on appearance, behaviors and microscopic features. 

Things are changing dramatically as we learn more and more about fungus. Many mushrooms that look and act very similar -- which we had previously assumed meant they were related -- are actually not closely related at all. And may, in fact, be related to other fungus that look nothing like each other. 

As a result, I have updated my blog posts to reflect the current proper Latin/scientific names for the mushrooms I have featured on my site. 

NOTHING about identification or toxicity has changed. ONLY Latin NAMES. 

The ringless honey mushroom: Desarmillaria caespitosa (Formerly Armillaria tabescens)

Warning: this is NOT A BEGINNER's mushroom. 

This mushroom cannot be positively identified by observing features alone, a spore print must be done for positive identification. This mushroom has many lookalikes, some of which are deadly, others will make you very sick. Use the following tips as a guideline only, but confirm your identification with other reliable sources and a trusted local expert.   

As always, it's your responsibility to make sure you are 100% sure of any wild plant or mushroom you consume.  

Finally, even when properly ID-d, ringless honeys are notorious for giving some people ACUTE GI problems. Always try a very small amount, like a single cap, for the fist time, then a small portion (3-4), before you consume a whole meal's worth.

Identification difficulty level: Intermediate 

Armillaria tabescens, commonly known as the ringless honey mushroom, is one of the most prolific edible wild mushrooms of early fall, at least some years. When they fruit, I find I can't go anywhere without tripping over hundreds of patches, still other years I won't see a single one. 

2022 Update Note:

Originally believed to be a species within the genus Armillaria (the ringed honey mushrooms), recent (2017-2019) Korean DNA sequencing has proved that ringless honey mushrooms are actually different enough to be their own, related, genus. 

The new name for this genus is currently Desarmillaria.

Further sequencing in late 2021 revealed that the North American and European species are not exactly the same, meaning the name Desarmillaria tabescens belongs to the European species (which was discovered first) and the new name of Desarmillaria caespitosa has been created for the North American species. I have updated this 2016 post accordingly. NO ID FEATURES HAVE CHANGED, ONLY THE NAME. 

 

Please read carefully all content below. Each step, including location and substrate, is essential to identification of this fungus. Wherever possible, I have tried to illustrate every single feature with a photograph, or two.

I chose to write this article because a blog post can show many, many more pictures than a book can, allowing me to really illustrate more features.