Common AZ fungi in Ponderosa ForestThe vast majority of forested area in Arizona is arid woodland. At lower, hotter, dryer elevations are the vast Pinyon - Juniper forests. At higher, cooler, slightly wetter elevations are the Ponderosa forests. These forests lack a substantial humus layer, and retain moisture in their soils poorly. These are far from ideal conditions for mushroom producing fungi, but the conditions are just adequate enough for some of the more xeritolerant species to make a living. |
Most of the fungi you will see in Ponderosa forests are in one of three categories:
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Slippery Jacks Slippery Jacks get their name from how slimy their cap cuticle becomes when wet. They are one of several genera that belong to the boletes (pored mushrooms). They are mycorrhizal, and associate with conifers almost exclusively. In Arizona, you rarely find other members of the boletes (such as the king bolete) in association with Ponderosa Pine. Most Slippery Jacks are edible, but are typically of poor quality. As a general rule, bitter Slippery Jacks are inedible. Properties: |
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Barrow's Bolete Barrow's bolete is often referred to as a pure white cousin of the most prized king bolete, Boletus edulis. Its discovery is attributed to Chuck Barrows of New Mexico, an amateur mycologist and quite a character. I highly recommend that you read this article about Mr. Barrows and his bolete. The Barrow's bolete is a prized edible bolete that only occurs in the Southwest within Ponderosa Pine edge habitat. That makes it a great candidate for mushroom road hunting! Although the BB is said to associate only with Ponderosa, I have found numerous fruitings in one location occupied exclusively by White Fir. Although the BB occurs with Ponderosa, it does so at the wettest regions of its range. Dry, sandy ponderosa stands are unlikely to support this wonderful mycorrhizal partner. Properties: |
The beautiful and coveted Barrow's Bolete. The most abundant fruitings of this fungus tend to be on the edges of Ponderosa Pine stands that recieve decent rainfall. The most I have found have been along the Rim Road (FR300) during the monsoon season. |
Russula spp. and Lactarius spp. The genus Russula contains around 700 species, and are especially difficult to identify to species. They are mycorrhizal, and, in Arizona, associate almost exclusively with conifers. Both Russula, and its sister genus, Lactarius, have unique tissues that are brittle and crumbly instead of fibrous. This makes these genera easy to identify... but again, good luck narrowing them down to species! Russula contains many edible species, and fortunately, in North America it is fairly easy to pick out inedible specimens. As a general rule, those members of Russula that have a peppery taste when raw are inedible / poisonous. Properties: |
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Earthstars These specialized puffballs are great fun to discover. When immature, they look like little brown balls. As they mature, the star arms open along perforated seams, and fold back to form a stand that raises the puffball section off the ground. This speeds drying and increases the distance the spores will travel on a breeze. Interestingly, they rely on raindrops from a future rain to "knock out" the newly dried spores. Unlike puffballs, which are detritus decomposers, earthstars are mycorrhizal. I have found them in rings surrounding Pine and Doug. Fir saplings. |
These particular earthstars, Geastrum hygrometricus, are especially fun to find and you should keep a few if you do. They are capable of repeatedly closing and opening as they are dried out and rewet. Photo: perverdonk.com |
Conks, brackets, and shelves The Ponderosa forest is filled with wood rotters. Truly spectacular scenes of wood rotting can be found in the Rodeo Chedeski burn areas. Wood rotting fungi in the Ponderosa forest are a specialized lot, and require far less moisture (but far more time) than those in the mixed conifer areas. These are fungi that produce conks, brackets, shelves, and crust-like fruiting bodies. Ganoderma spp. and Fomes spp. (Figure 1) Ganoderma and Fomes are classical conk forming wood rotters. Their fruiting bodies are perennial, and can grow to gigantic size. I have found Ganodermas as large as a trash can lid. Each growing season, they will add a new layer of tissue, often forming visible growth rings like a clamshell. For Ganoderma, new tissue typically increases the conk diameter. For Fomes, the new layer is often on the underside, creating a hoof-shaped conk. Trametes spp., Stereum spp., Gloeophyllum spp. (Figure 2) Members of this wood rotting group form much smaller, thin fruiting bodies that are often referred to as brackets. But don't let their small size mislead you. These wood rotters are every bit as potent as their conk-forming relatives, and a large tree / log can be completely occupied inside despite the dimunitive structures showing outside. There are a wide variety of bracket producing wood rotters. The three I am highlighting are the most common in each of three categories, based on their spore-bearing undersides.
Cinnibar Red Polypore P. cinnibarinus is a spectacular reddish orange wood rotter that produces brackets that are much thicker than those mentioned above. When immature, the entire bracket is brilliantly colored. In a short time, however, sunlight bleaches the upper surface, leaving it pinkish-white with a trace of red on the outer margin. The pore surface underneath remains brightly colored, however. These brackets are perennial, but rarely grow larger than 4"-6" diameter. I have personally only found P. cinnibarinus in the Pinyon-Juniper forests near Prescott and Sedona. It probably occurs throughout the arid forest regions, and is certainly worth keeping an eye out for wherever you are. |
Figure 1: Giant Fomitopsis pinicola conks in the Rodeo Chedeski burn zone. Figure 2: Stereum sp. on a standing dead trunk in another burn area. Figure 3: Pycnoporous cinnibarinus on a fallen Juniper branch, flipped over to show the spectacular pore surface. |
Those giant shiny orange mushrooms! Spectabilis indeed! G. spectabilis grows such large, visible fruitings that it can be seen a football field away from the highway! This giant wood rotter often colonizes tree stumps, and can also be found at the base of standing dead (or dying) conifers. It is hard to misidentify G. spectabilis, but in some cases rain and sun can diminish its powerful orange pigments. No Gymnopilus species is edible, but you would figure that out on your own if you tried nibbling on its incredibly bitter flesh. Properties: |
Massive fruitings can be seen along Highway 180 north of Flagstaff after the monsoon rains and well into the fall. This is where forest thinning has left numerous conifer stumps alongside the road, each colonized by various wood rotting fungi. |
Caesar's Amanita
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Morels Morels are the most highly prized and sought after wild mushroom in America. However, if the rest of the US was like Arizona, they would probably be mostly overlooked. Our arid climate and mild winters often fail to satisfy the very strict fruiting requirements of morels. Morels go through a series of physical changes as the seasons pass, and require a cold winter and a lengthy, wet snowmelt in the spring for mushroom production. Fruitings typically appear 2-4 weeks following the snowmelt (so, late April to mid May). In Arizona and throughout the Colorado Plateau, the primary (or only) Morel is the Black Morel. Arizona does have one condition in its favor: forest fires. Morels have a reputation for springing up in the spring after a previous year's forest fire. Of course, the common requirements of cold winter and snowmelt still stand. So, if you want to improve your chances of finding Morels, pay attention to Forest Service notices of controlled burns and other fires. Beware the false Morel, Gyromitra. Be sure to visit the "Know Your Enemy" section to familiarize yourself with it. |