Top 20 Most Common Mushrooms in Iowa

1. Dryad's saddle

A familiar sight to spring morel hunters, dryad's saddle is noteworthy for its large size, striking scales, and watermelon-like smell. Similar to other mushrooms in the bracket fungi family, dryad's saddle can be used to make paper. Younger mushrooms are better suited for this purpose due to their smaller and more consistent fibers.

2. Golden oyster

The golden oyster(Pleurotus citrinopileatus) can be distinguished from other mushrooms by an iridescent butter-yellow cap that matures into the color of sunshine. As the color intensifies, the cap also becomes more brittle, making it very difficult to handle. The golden oyster is a delicious species that is highly desirable for culinary uses.

3. Chicken of the woods

Chicken of the woods is very noticeable in hardwood forests, appearing in clusters on standing tree trunks in bright orange and yellow hues that sometimes last through the entire winter. It is a parasite that causes an unfortunate brown heart rot, and is considered a particularly troublesome pest of Yew trees. If the fruitbodies can be seen, the tree is likely already beyond saving.

4. 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.

5. White jelly fungus

Unlike other jelly mushrooms, which are typically found on fresh deadwood, white jelly fungus grows on well-decayed wood from hardwood trees. Its fruiting body is indeed white, fading to muted brown hues with age. Its shape has garnered a wide range of comparisons, from brains to popcorn to coral.

6. Pear-shaped puffball

The mushrooms of this species grow in such tight clusters that they may cover fallen trees and stumps almost entirely in a brownish, puffy coat. Pear-shaped puffballs appear all around the northern hemisphere on decaying hardwoods from fall through winter.

7. Crown-tipped coral

Crown-tipped coral(Artomyces pyxidatus) is a widespread but uncommon species in North America and Western Europe whose Latin name, meaning "box-like," is inspired by its structure. It is one of the few coral fungi to fruit on wood. After a period of absence lasting over a century, it has recently reappeared in Great Britain.

8. Giant puffball

These distinctive round, white fungi appear around the world in fields and at the edges of wooded areas. Living up to its name, a single giant puffball can grow as large as a watermelon. They have no stems, and produce trillions of spores that release into the air through holes in “puffs.” They have been used as slow-burning tinder and produce copious smoke when set aflame. Giant puffballs are technically edible, but should only be consumed when the mushroom is young and firm.

9. Devil's urn

The devil's urn (Urnula craterium) is a black or brown cup-shaped fungus. The species' tough, cracked outer layer and dark coloration may give it a scorched appearance. Devil's urns tend to grow in clusters and are usually found adorning fallen branches and rotting logs. Though the species is not edible itself, gatherers keep an eye out for it, as it usually fruits at about the same time as morels.

10. Cedar-apple rust

The vividly-colored fruitbodies of cedar-apple rust (Gymnosporangium juniperi-virginianae) might be mistaken for flowers, from a distance. Upon closer inspection they can be identified as fungal growths attacking the fruit of cedar trees. Their microscopic spores can travel up to an astounding 5 miles when carried on the wind and infect cedars quite far away, weakening the trees as they grow.

11. Split gill

Split gill(Schizophyllum commune) can be found across the globe. Uniquely, it is the only mushroom species known to display the capability to retract by movement. It is considered inedible, although not necessarily toxic. Furthermore, it is not recommended to smell this species, as the spores are capable of sprouting and growing in nasal passages.

12. Black knot

The appearance of black knot (Apiosporina morbosa) is commonly found on various fruit-bearing trees and looks more like abnormally growing bark than it does a fungus. In youth, this bulbous growth is a lighter green but rapidly turns to dark brown and black. Black knot can kill trees and is not easily controllable using fungicides.

13. Resinous polypore

This shelf or bracket mushroom occurs on the wood of conifers and hardwoods around the world, either singly or in groups. Young resinous polypore fruitbodies are moist with a red sap-like substance that may form droplets around the edges; as they mature they dry out into a darker, tougher texture with a resinous exterior.

14. Jack-o'lantern mushroom

The jack-o'lantern mushroom is so-called because of its bright orange color, and because it often appears in the fall (usually before Halloween, though). This vibrant little mushroom can be found growing on decaying hardwood stumps and logs. The species does have some superficial resemblances to the highly edible chanterelle (Cantharellus cibarius), but it is toxic and should be avoided!

15. 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.”

16. Crowded parchment

The crowded parchment is a common mushroom that can be found on dead hardwood material. The species is so-named because it grows in very thin, sheet-like shelves, which often become folded when they run up against each other. Crowded parchment is usually found in shades of brown, tan, or orange.

17. Violet-toothed polypore

This inedible shelf or bracket fungus grows in overlapping clusters and layers on hardwood stumps and fallen logs. It also causes a sapwood rot in standing trees. Check under the violet-toothed polypore's cap for its secret lilac-shaded pore surface studded with descending “teeth.”

18. False turkey-tail

A common woodland fungus found across North America, the false turkey-tail thrives in wet environs and can be found in copious quantities on decaying wood. The species is so-called because it looks similar the also-common Turkey Tail (Tremetes versicolor) - both species grow in thin, roughly semi-circular sheets. False turkey-tails have tough, woody bodies and are considered to be inedible.

19. Artist's conk

This shelf fungus can live for several consecutive years and can be dated by the growth ridges seen on its dark surface. Artist's conk grows in tiered groups at the bases of oak, beech, and conifers, as well as deadwood. When its spores release, they cover the area with visible brown dust. Scratches in the white undersurface create dark lines.

20. Discina brunnea

Discina brunnea forms into a wrinkly but relatively hefty morel-like fruiting body. Individual examples have been recorded weighing as much as 0.5 lb. It grows among hardwood trees. The specific name, brunnea, is the Latin word for "brown," and was given for obvious reasons.

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