Top 20 Most Common Mushrooms in Washington
Nestled amidst the splendor of evergreen forests and diverse ecosystems, Washington provides an ideal habitat for countless species of fascinating fungi. The state's humid climate and dense woodland expanses make it a haven for the 20 most common mushrooms. Marvel at the variety of ok fungi in Washington; each bears unique traits and contributions to the ecosystem. This guide aims to introduce you to these mushroom species abundant in Washington, a state emblematic of America's mushroom richness.
Most Common Mushrooms
1. Fly agaric
In Northern Asia and Europe, fly agaric grows under trees near the winter solstice and is collected for ritual use tied to the season. Its characteristic shape and coloring are still ubiquitous in many European fairy tale illustrations and Christmas traditions. It is highly toxic.
2. Turkey tail
The distinctively-striped turkey tail fungus grows on stumps and logs all over the forests of the northern hemisphere. It is, in fact, probably the most common species you will find. That doesn't mean this mushroom is plain, however; each cap is uniquely patterned. Look for bands of alternating textures as well as color.
3. Red-belted polypore
Red-belted polypore is a shelf fungus that's usually seen on aspen, birch, and various conifer trees. This perennial mushroom is known to cause the cubical brown rot in host trees. A species new to science, it was named in honor of Irene Mounce, a Canadian mycologist. 
4. Oakmoss
Evernia prunastri grows shrubby on trees. The yellow-green lichen grows up to 10 cm. It consists of up to five millimeters wide shrubby branched bands with a light underside. At the edges of these open dusty (Sorale). Apothecias (with shiny brown disc) are rarely formed.
5. Questionable stropharia
The questionable stropharia is an odd-looking species that thrives in rich, wet soils along the western coast of North America. The species sports a shiny, yellow-brown cap with a white partial veil that looks almost as though it is dripping off the cap. "Questionable" is a fair title for this species, about which there are conflicting reports on edibility. Most experts recommend staying on the safe side and avoiding eating this mushroom.
6. Shaggy mane
The shaggy mane mushroom is commonly found in North American and European grasslands. Some peoples foraged for its young egg-shaped caps, but it has more recently been found to be a bioaccumulator of heavy metals, meaning it pulls toxic metals up from the soil where it grows. As a result, shaggy manes should not be eaten. The mushrooms usually appear in clusters or “fairy rings.”
7. Candlesnuff fungus
The bizarre shape of the candlesnuff fungus (Xylaria hypoxylon) is one that you'll never forget. Finger-like growths explode from decaying wood, and look more like stalagmites or antlers than they do mushrooms. The shaft is black at the base, fading dramatically to bright white at the tip.
8. Dyer's polypore
This shelf fungus grows annually on living coniferous trees and may kill its host if left untreated. As the name suggests, dyer's polypore can be used to produce dye for yarn in a variety of shades from yellow to orange to brown, depending on the age of the mushroom used and also the type of metal it’s processed in. It is not considered edible.
9. Orange jelly
This offensive-looking slimy body of the orange jelly (Dacrymyces chrysospermus) erupts from fissures in tree bark in the forest. The point in which the caps attach to the host plant is brilliant white, creating a stark contrast from the bright yellow, brain-shaped cap. The most common place to find this mushroom is in decaying conifer wood.
10. Western varnished conk
The western varnished conk (Ganoderma oregonense) is a stunningly attractive mushroom that looks as though the entire cap was dipped in glaze and crafted from terra cotta. They can grow to be quite massive, with each cap stretching up to 50 cm across. They appear even more impressive when several mushrooms are found growing together. Far too pretty to eat, this mushroom is toxic anyway!
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