SD Mushrooms with cap, stem, and gills.

South Dakota is home to a huge variety of mushrooms, some are delicious and some painfully deadly! This page lists only mushrooms that have a stem and cap with gills (see above photo). If you want to identify other types of mushrooms such as spherical mushrooms, mushrooms with pores, shelf mushrooms, etc. please start on the main mycology page:

Agaricus Bitorquis – My oldest son was the first to spot this mushroom on our city block. They are tasty if you can beat the maggots to them. You can find the caps barely poking out of the hardpacked dirt on lawns. This can appear very similar to aminitas that grow in the area. DIG DEEP to make sure there is no vulva at the base.

Agaricus Silvicola – Absolutely beautiful mushroom! I found these fruiting in a nearby forest at the exact same time as A. Bitorquis fruits in my local neighborhood. Tasty, but not as good as A. Bitorquis.

Coprinus Comatus – Also known as “shaggy mane”. Originally found in my backyard before I had started hunting mushrooms in 2021. Now I can’t seem to find them before they deliquesce!

Coprinellus Mycaceus – This is probably my most frequently found edible mushroom in Sioux Falls. Every time it rains I walk the block and pick these where all the ash trees were cut down due to the ash bore. I will be the first to admit that they taste quite bland but they work well in fried pickled beet sandwiches, stir-fries, and any dish that needs a mushroom. I find these from spring through fall!

Gymnopilus Junonius – The first and only time that I have found this mushroom was mid September on a 53*F early morning hike. The previous day was light morning sprinkles with heavy rain for the latter part of the evening. Prior to that it was 3 weeks of 80*F+ dry weather. The stump was covered in tons of, I assume, aborted young mushrooms (blackened from decay). Many of the still living young specimens had deformed caps perhaps from the heavy rain. The three mushrooms that grew to maturity each had a dark annulus. Largest cap was 11cm, second largest 7cm, and the 3rd was just over an inch. All of the large mushrooms were old, covered in bugs, and knocked over as if a squirrel used them as a mini punching bag. Light grayish-green bruising appeared two days after cutting mushroom in half. I will be watching the pins these next few days to gain any clues as to why the previous flush all died before the veil dropped.

Lepiota Rubrotincta – I find these all over the local hiking trails and recently growing in the woodchips surrounding my house. Stem becomes hollow with age. White spore print.

Marasmius Androsaceus – An absolutely ENORMOUS mushroom found growing directly on leaves. Due to the huge size I did not attempt a spore print and just enjoyed finding this mushroom while sitting down for a snack with my boys. The species could definitely be wrong.

Panaeolus Foenisecii – An inconspicuous LBM (little brown mushroom). These are incredibly common and the only reason why I was able to properly ID them among the thousands of seemingly identical LBM’s is due to the growing location (lawns), the viscid cap with a dark brown ring along the cap edges, and the dark brown spore print.

Pleurotus Ulmarius – “Elm Caps [P. Ulmarius] are often mistaken for oyster mushrooms.” (excerpt from Mushrooms of the Upper Midwest). This exact same thing happened to me. As I saw these hanging off the underside of a downed tree I became quite excited until I pull them off and realized they had a full stem and cap. WTF!? The gills did not run down the stem like in P. Pulmonarius either. Damn. I was unable to get a spore print so this designation is a good guess at best.

Pluteus Petasatus – The first time I found this mushroom (which was 15cm!) it was baking in the hot sun, no shade, in dry dirt. I was quite fascinated because this seemed like the absolute worst possible growing conditions for such a large mushroom. P. Petasatus stands out because it has a shiny cap when totally dry. This mushroom grows from buried wood and roots. Originally the very heavy and wet spore print looked brown so I questioned the ID (p. petasatus has a “salmon” spore color) but as the spore print dried it turned a light-reddish-brown also known as salmon!

Psathyrella (possible Psilocybe) – I stumbled on this LBM when I was hiking solo after almost 3 days of rainy overcast weather mid September. This means I didn’t have my kids with me and could really obsess over something as boring as this little mushroom. I tried my very hardest to ID based on macro characteristics but not one of my four guide books had this mushroom in it (I can’t blame them!). Spore print was completely black. I am assuming this is psathyrella based on Stamet’s key but psilocybe based on Arora’s key. I tried to blow off some sand and the cap exploded (brittle). Then I squeezed a mature cap and it was quite robust? The stem snaps partially but can be bent 180* against itself without fully breaking. Mature gills have white edges and the pellicle is separable.

Unknown Mushroom 1 – Unique light blue velvety cap. I was with family and friends when I stumbled upon this little guy. I took some photos and got a white spore print but never got around to a proper ID.

Unknown Mushroom 2 – This thing is eating our deck! I some how managed to not get any photos of the stem or ring so I have not been able to ID it based on my old photos. I know galerinas are a similar size with the same colored spore print but I’m hoping I’m wrong!

I have found an overwhelming amount of mushrooms this 2022 summer and hope to start going through photos, notes, and spore prints as time allows.

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