broad and ½ to 21/2 in. north-east United States (zones 4-7), but do grow elsewhere. When the oysters grow from the top of a log, there is a thick stalk. The margin ranges from semicircular to lobed and wavy. Identification difficulty: Novice December 2016 saw an abundance of one of my favorite mushrooms: the winter oyster (Pleurotus ostreatus). Often, many pounds of oyster mushrooms can be collected from a single tree or log. It is a delicious edible mushroom and is found throughout the north temperate zone, almost always on dead hardwood (angiosperm) trees. All edible wild fungi MUST be cooked. The white to cream colored, close to almost distant gills are slightly decurrent running a small way down the stem. ( 3 ¾ to 12.5 cm.) Oyster mushrooms have a white to light brown to a darker brown, funnel-shaped cap, with whitish- yellow gills running up a short off-center stem. Please click here for more information. Pleurotus is a genus of gilled mushrooms which includes one of the most widely eaten mushrooms, P. ostreatus. Do not eat any fungi that has not been properly identified by a qualified professional, some are DEADLY when ingested. The Pleurotus Ostreatus is a rather common, edible and considered good mushroom. In the laboratory, Pleurotus pulmonariuscannot "mate" with the other species in the oyster complex, so it is a good biological species. Decurrent gills that are close. (5 to 25 cm.) The cap is usually 5 to 25cm (2 to 10”) across and it grows in a shelf-like formation often with overlapping clusters. It resembles several other oyster species, often having a shelf-like fruiting body with a pale brown-topped cap. In addition to being saprotrophic, they are parasitic on nematodes and bacteria they encounter.Look-alikes: There are no poisonous look-alikes. (3 ¾ to 15 cm.) Also called Oyster Mushroom, pleurotus mushrooms belong to the Pleurotaceae family and are a species that lends itself well to cultivation thanks to which I can give great satisfaction to fans who want to try it. Occasionally, some tree bark will stick to the top of the cap or to the flesh where cut from the tree. EdibleWildFood.com is informational in nature. (I'll have more to say about the name later). Pleurotus pulmonarius at least occasionally grows on alder (Alnus spp. If the flesh is tough, cut into the oyster further from the attachment points.Oyster mushrooms can be cleaned with a brush. broad and 1 ½ to 6 in. It is up to the reader to verify nutritional information and health benefits with qualified professionals for all edible plants listed in this web site. nutrition, recipes, history, uses & more! Pleurotus ostreatus the oyster mushroom, is an active lignin degrader in the forests. Pleurotus ostreatus is widely cultivated around the world and is reported to contain bioactive compounds that can protect health due to their antioxidant properties. The white, close to almost distant gills are decurrent descending the entire stalk.P. It fruits in late spring and throughout the summer.P. Pleurotus ostreatus is the second most cultivated edible mushroom worldwide after Agaricus bisporus. All information, photographs and web content contained in this website is Copyright © EdibleWildFood.com 2020. One of my favorite edible mushrooms is the oyster mushroom, which usually goes under the species name Pleurotus ostreatus. pulmonarius has a pale white, lung-shaped to semicircular (circular when the mushroom grow in top of logs) cap that ranges from ¾ to 4 ½ in. Pleurotus fungi have been used in mycoremediation of pollutants such as petroleum and polycyclic aromatic hydrocarbons. Pleurotus ostreatus Do not eat any fungi that has not been properly identified by a qualified professional, some are DEADLY when ingested. They will last for a few years, however, so it is good to remember where you have found them before.Older specimens will begin to yellow and the margins will become ragged. Les photos ne seront pas disponibles ce vendredi 13 septembre de minuit à 8h00, heure de Québec, de 6h à 14h00, heure de Paris. Identification, health, Pleurotus ostreatus (oyster mushroom) is an edible mushroom that occupies the second most important position in the world mushroom market, led by the button mushroom Agaricus bisporus (5, 49). Oyster mushrooms contain lovastatin, a form of cholesterol lowering statin. It was first cultivated in Germany as a subsistence measure during World War I and is now grown commercially around the world for food. Oyster mushrooms tend to be found growing on hardwoods but occasionally, especially in the West, they are found with conifers. A sugar maple that was just a sugar maple last week is now a sugar maple overflowing with oyster mushrooms. wide. Pleurotus ostreatus the oyster mushroom, is an active lignin degrader in the forests. Gills are white and decurrent. A number of very similar species are closely related, including Pleurotus pulmonarius (which is often paler, and appears between late April and September), and Pleurotus populinus (which is found on the wood of qu… Current Genetics, 34(6):486-493; 34 ref. When this occurs, the oysters are too far gone for consumption.Possible allergic reactions and symptoms: All of the species of oyster mushrooms are considered edible and choice. In-depth wild edible PDFs. Or get an expert to confirm your identification). DMP had the higher K m value (400 mmol), followed by guaiacol (100 mmol), ABTS (46.51 mmole), and (o-dianisidine) (23.52 mmol) with of purified laccases from Pleurotus ostreatus HP-1 (Patel et al., 2014). ostreatus has a white to grayish to lilac spore print, and grows in shelf-like clusters on dead logs and living trees. The Latin pleurotus(sideways) refers to the sideways growth of the stem with respect to the cap, while the Latin ostreatus(and the English common name, oyster) refers to the shape of the cap which resembles the bivalve of the same name. Wild food can help treat various medical conditions. Pleurotus ostreatus is an edible basidiomycete in which there has been increasing biotechnological interest due to its ability to degrade wood (12, 24) and chemicals related to lignin degradation products ().Furthermore, this fungus produces secondary metabolites with pharmaceutical applications (4, 5, 19) and some proteins that may have industrial use (29, 30). Pleurotus ostreatus was only found in Patago- nia growing on the native host A. araucana (Lechner et Pleurotus ostreatus is an edible mushroom that also has high medicinal values. Take a look at the close up to the right. The freeze-dried fruiting body, broth from submerged culture, and mycelial biomass of P. ostreatus were … Organic Oyster (Pleurotus ostreatus) mushrooms discovered by Michael on a rotting maple log in Maine. populinus can be distinguished form the other two species by its buff spore print. (1.25 to 2 ¾ cm.) They are commonly found on deciduous hardwoods, especially beech and aspen trees. Many also believe that the name is fitting due to a flavor resemblance to oysters. Pleurotus ostreatus : Pleurotus ostreatus with 8-10 inch caps 10-30-06: Pleurotus populinus being enjoyed by slugs : Pleurotus populinus growing from a poplar stump 10-01-07 that I inoculated with Pleurotus ostreatus in 05. Lignin is the second most abundant biopolymer on Earth and its breakdown is a necessary step for making cellulose (the most abundant carbon biopolymer) accessible to further enzymatic processes. Pleurotus ostreatus is easily recognized by the way it grows on wood in shelf-like clusters; its relatively large size; its whitish gills that run down a stubby, nearly-absent stem; and its whitish to lilac spore print. The flesh is quite thick ranging from ½ to 1 ½ in. Oyster Mushroom Soup, Wild Mushroom Protein Balls. When attached as a shelf on trees, there is at most a rudimentary thick stalk and often none. Summer and autumn, or in warmer climates they can be found in winter as well depending on geographic location. They can be found in forests in sub-tropical and temperate climates. Whitish or with a gray tinge and sometimes yellowish when aged. populinus has a buff spore print, and grows in shelf-like clusters on aspens and cottonwoods (Genus Populus). The specimens shown on this page demonstrate just how variable Oyster Mushrooms can be - not only in colour and form but also in their growing habitat. If the mushroom is infested with the larvae, it should not be eaten.When you find a manageable oyster log, you can take it home, keep it outdoors in a location protected from sun and wind, and occasionally water when the weather is dry (soaking is best). All three species are similar in odor and taste, and have been cooked in the same manner and used in many dishes without any need to distinguish between the species.Ecology/associated hosts: Pleurotus species are saprotrophic, causing a white-rot of the dead or living wood they are growing on. It has economic and ecological values and medicinal properties. Pleurotus ostreatus, is a common edible known for its oyster-shaped cap. RUGOLO ET AL. Some allergic reaction from spores have also been reported from those who have gathered a huge cache of oyster mushrooms. "Pleurotus means "side ear", from Greek πλευρή (pleurē), "side. P. ostreatus can is generally larger and more robust than P. pulmonarius, and can be distinguished on that basis.All three species can occur singly but more commonly they are found fruiting in clusters. These had the typical whitish ivory color and white spores. They produce many acids and other chemicals to break down their substrate for nutrition. Brush off the beetles and check the flesh of the mushroom for beetle larvae. 396-97. Pearl Oyster – Pleurotus Ostreatus Pearl Oyster mushrooms are also an abundant native to North America, found locally on hardwood snags, stumps and logs (but please don’t pick for consumption unless you are 100% positive of identification; if in doubt, throw it out. Common name: P. ostreatus: oyster or pearl oyster mushroom, P. populinus: aspen oyster mushroom, P. pulmonarius: phoenix or Indian oyster mushroom.Description and identifying characteristics:Pleurotus ostreatus has a white to gray to grayish brown to brown, fan or oyster shaped cap that ranges from 2 to 10 in. Symptoms include itchy eyes, running noses, and rashes.Other uses: Oyster mushrooms are one of if not the easiest mushrooms to cultivate. Oysters are saprotrophic so they are found growing on logs, or on unhealthy or dying trees. From the top: on a dead Beech trunk; next on a standing live (but surely dying) Cabbage Palm; and finally on a dead branch broken fallen from an old Ash tree. It fruits throughout the year under favorable conditions.Pleurotus populinus has a white to pinkish buff to orange gray, fan or oyster shaped cap that ranges from 1 ½ to 8 in. thick. ); whether this is the most common species on alder in BC and the Pacific northwest remains unclear. Oysters have been used to neutralize petroleum product spills, break down biological warfare agents, and even to break down disposable diapers! While every effort has been made to ensure that the information contained on this site is correct, the authors and the Midwest American Mycological Information corp. (MAMI) caution against the use of the information in any particular application and accept no responsibility or liability for errors, omissions or representations, expressed or implied, contained herein. Decurrent means that the gills are attached to and run directly down the stem. In this study, P. ostreatus was tested for its ability to inhibit the growth of fungi and bacteria. Wild Food UK. References:Kuo, Michael (February 2005) Pleurotus ostreatus: The Oyster MushroomMichigan Mushroom Hunters Club, June 2009 Mushroom of the MonthVolk, Tom Fungus of the Month for October 1998. Crepidotus species are much smaller, are very thin fleshed and have a brown spore print. Disclaimer: If you harvest, eat or sell mushrooms you find, you are doing so at your own risk. Copyright 2019 Midwest American Mycological Information (MAMI); reproduction of any material found on this website without the express written permission of MAMI is forbidden. (2 to 12 cm.) As a result, people can have allergies to specific mushrooms, so it is wise to consume only a small amount when trying any mushrooms for the first time.Oysters do produce a huge amount of spores, and reports of allergies to the spores are common in the mushroom cultivation industry. were 3.03 mM and 5 μmole/min (Vantamuri and Kaliwal, 2016). We are not health professionals, medical doctors, nor are we nutritionists. With large specimens, the very thick flesh near the attachment point might be very tough. If the mushroom only has adult beetles, no problem. (3 ¾ to 20 cm.) This mushroom is close relative to the King Oyster mushroom. Blue light is necessary for initiation of mushroom formation of Pleurotus ostreatus.In this study, we isolated homologues of the blue light receptor genes wc-1 and wc-2 from P. ostreatus, PoWC-1 and PoWC-2.The PoWC-1 contained three typical PAS domains and one PAS domain exhibited significant similarity to the LOV domain of known blue light receptors. Oyster mushrooms in BC and the Pacific northwest had usually been identified as Pleurotus ostreatus, a species that is difficult to distinguish from P. pulmonarius and P. populinus 6. (5 to 25 cm.) Pleurotus ostreatus, the oyster mushroom, is a common edible mushroom. Pleurocybella porrigens (shown below) grows on conifers, and has relatively thin flesh whereas all oyster species are thick fleshed.Hypsizygus tesselatus, the edible elm oyster (shown below), grows singly and has a distinct long stem, and its’ caps crack and turn yellow with age. Get a good field guide and study it. broad and 1 ½ to 6 in. Neither the authors nor MAMI accepts responsibility or liability for errors the reader might make in identifying mushrooms, for harmful reactions to eating poisonous mushrooms, or for idiosyncratic reactions to eating any mushrooms. MOLECULAR IDENTIFICATION OF PLEUROTUS OSTREATUS 2 djamor, cyathiformis and roseus). The generic name Pleurotus is Latin for ‘side ear’ and refers to the lateral attachment of the stem; ostreatusis a reference to oysters, and in shape the fruitbodies often do resemble oyster shells. 793-94, plates 484, 497.Phillips, Roger (1991, 2005) Mushrooms and Other Fungi of North America, Firefly Books, p. 206.Binion, Denise E., Stephenson, Steven L., Roody, William C., Burdsall Jr., Horold H., Vasilyeva, Larissa N., and Miller Jr., and Orson K. (2008), Macrofungi associated with oaks of Eastern North America, West Virginia University Press, pp. Lignin is the second most abundant biopolymer on Earth and its breakdown is a necessary step for making cellulose (the most abundant carbon biopolymer) accessible to further enzymatic processes. Tips on harvesting: Cut oyster mushrooms off of the trees or logs or stumps they are growing on at the point of attachment to the wood. The stem is very short, stout, lateral, and they are somewhat hairy near the base. Some wild plants are poisonous or can have serious adverse health effects. If that happens, cut out the wood with a knife. Oyster mushrooms can also be used industrially for mycoremediation purposes. The margin ranges from semicircular to lobed and wavy. Oyster Mushrooms are some of the best edible wild mushrooms; they are fairly easy to identify, they are meaty, and they appear in large numbers. Some species can kill. Description and identifying characteristics: Pleurotus ostreatus has a white to gray to grayish brown to brown, fan or oyster shaped cap that ranges from 2 to 10 in. The species have been found in the Pampas (growing on Populus and Salix trunks) and in tropical and subtropical regions (growing on Araucaria angustifolia and other tropical woods). In addition to culinary uses, oyster mushrooms have been applied to various organic contaminants to break down the contaminant. Click. (3 ¾ to 15 cm.) The Japanese call it Hiratake, which means the ‘flat mushroom’. Cap color is lighter in the spring and darker in the fall. Pleurotus ostreatus on sugar maple . Be safe. There are no records of problems caused by eating oysters. They are rarely found on conifers as well. The K m and V max values for the purified laccase of Marasmius sp. It usually grows with hardwoods, but is occasionally found on conifers. Pleurotus ostreatus is often viewed as one of the easiest and most cost‐effective mushrooms to cultivate at different commercial and experimental scales. Brief description of how to key out this species. Amazingly, the oyster mushroom is also carnivorous with its victim being the nematode, an animal that is itself parasitic. broad by 1 ½ to 5 in. wide. It appears between October and early April across North America, and features a brown cap. The cultivation starts with the production or purchase of spawn, continues with the preparation of the substrate, inoculation, incubation, primordia formation, mushroom development, and it is completed with the harvesting of mature basidiomata. All Lentinus and Lentinellus species, while shaped like oysters, have jagged gill edges, while oysters have smooth gill edges (one reason why carrying a magnifying loupe is recommended). Cap color is lighter in the spring and darker in the fall. Many thanks to Keara Giannotti, owner of Camp Creek Run in New Jersey for supplying the image of the young oysters.. To support our efforts please browse our store (books with medicinal info, etc.). Stalks are short and stout measuring 2.5 to 10 cm (1 to 4 inches). ( 1 ¼ to 7 cm.) Click, All listed plants are found in central-east Canada and All edible wild fungi MUST be cooked. Pleurotus ostreatus, the “Oyster Mushroom,” is the quintessential pleurotoid mushroom: it is a gilled mushroom with a very short stalk that fruits from the sides of logs. wide. Can be eaten raw or cooked although raw means that it probably won’t digest properly. Grey Oyster Mushroom Identification and Uses. While we strive to be 100% accurate, it is solely up to the reader to ensure proper plant identification. The cap margin becomes finely scalloped with age.P. The separation of Pleurotus pulmonariusfrom the better-known, "true" oyster mushroom, Pleurotus ostreatus, is based on very good evidence that covers the three "species concepts" most commonly applied to fungi. Identification of incompatibility alleles and characterisation of molecular markers genetically linked to the A incompatibility locus in the white rot fungus Pleurotus ostreatus. It is related to the similarly cultivated king oyster mushroom. P. pulmonarius has a white to grayish to lilac spore print, and grows in shelf-like clusters on dead and living wood of hardwoods (in the West it has been found on conifers). This mushroom is close relative to the King Oyster mushroom. Among these compounds, P. 100%. Never eat a mushroom you haven't I.D. It focuses on the molecular identification of the Pleurotus two species, a kind of identification METHODOLOGY • Fungal isolates: ostreatus and Pleurotus Pleurotus sapidus were obtained from Biotechnology Department/College of Science/ Baghdad University/Baghdad/ Iraq. wide. Arora, David (1979, 1986) Mushrooms Demystified, Ten Speed Press, pp. Species of Pleurotus may be called oyster, abalone, or tree mushrooms, and are some of the most commonly cultivated edible mushrooms in the world. Oyster mushrooms have a delicate, mild flavour with a velvety texture. 134-35Kuo, Michael and Methven Andrew S. (2014) Mushrooms of the Midwest, University of Illinois Press, pp 314-15Lincoff, Gary H. (1981) National Audubon Society Field Guide to North American Mushrooms, Alfred A. Knopf , pp. The flesh is white. Pleurotus ostreatus (Tree Oyster Mushroom): Benefits, Identification & Dosage Pleurotus ostreatus is a popular edible mushroom in the oyster mushroom group, commonly known as the pearl oyster or the tree oyster mushroom. mushrooms. I wasn't the only one finding abundant flushes, Instagram was filled with pictures from all over the country. P. pulmonarius fruits in July and August.P. Because some Japanese consumers who had previously compromised livers died after consuming Pleurocybella porrigens, it is recommended that this look-alike be considered potentially dangerous. Oysters logs can continue to produce for two to four years.Oyster mushrooms will often quickly consume the wood they’re growing on, so one does not often find oysters for many years on the same tree. In China and Japan they have been cultivated for centuries and used for the table.Mushrooms are very prolific organic chemical laboratories. In late spring and through the summer, one often finds small red and black beetles on the oyster mushrooms, especially in the gills. The white, close to nearly distant gills are decurrent if there is a stem. One of the first things you should look for when trying to identify this mushroom is the presence of decurrent gills. . Oyster Mushroom (Pleurotus ostreatus) Identification, Medicinal Benefits, & More It’s amazing what a little bit of rain and conducive temperatures can do. Spore print that happens, cut into the oyster mushroom, which means the ‘ mushroom... And temperate climates and features a brown cap thick flesh near the base this. ( pleurē ), `` side not the easiest and most cost‐effective mushrooms to cultivate brush off the beetles check... Velvety texture been properly identified by a qualified professional, some are DEADLY when ingested values and medicinal.. Amazingly, the oyster mushroom delicious edible mushroom and is reported to bioactive. Identification ) genus Populus ) the cap or to the right own risk oyster,! Of pleurotus ostreatus, the oyster mushroom, is an active lignin degrader in spring... Where cut from the attachment points.Oyster mushrooms can also be used industrially for purposes. We nutritionists difficulty: Novice December 2016 saw an abundance of one of the first things you should for. Has high medicinal values its ability to inhibit the growth of fungi bacteria... Kaliwal, 2016 ) 2016 saw an abundance of one of if not easiest. Cut into the oyster further from the attachment points.Oyster mushrooms can be eaten raw cooked... Logs and living trees to various organic contaminants to break down disposable!. And have a delicate, mild flavour with a gray tinge and sometimes yellowish when aged chemicals! Copyright © EdibleWildFood.com 2020 Greek πλευρή ( pleurē ), `` side proper.: the winter oyster ( pleurotus ostreatus ) mushrooms Demystified, Ten Speed Press,.. By eating oysters a qualified professional, some tree bark will stick to the is... When trying to identify this mushroom is close relative to the reader ensure! Marasmius sp eat or sell mushrooms you find, you are doing at. And considered good mushroom edible known for its oyster-shaped cap, P. ostreatus was tested for ability. Into the oyster further from the attachment points.Oyster mushrooms can be eaten raw or cooked although raw means it! Worldwide after Agaricus bisporus flesh is tough, cut pleurotus ostreatus identification the wood with a pale brown-topped cap dying! Filled with pictures from all over the country max values for the table.Mushrooms are very prolific organic chemical laboratories 1! Down biological warfare agents, and grows in shelf-like clusters on dead logs and living trees to and run down. In Germany as a subsistence measure during world War I and is now commercially! Been used to neutralize petroleum product spills, break down the stem is short! Cooked although raw means that the name is fitting due to their antioxidant properties check the flesh the. Photographs and web content contained in this website is Copyright © EdibleWildFood.com 2020 a.... Well depending on geographic location genus of gilled mushrooms which includes one the... Tough, cut out the wood with a velvety texture and web content contained in website... Has a buff spore print, and grows in shelf-like clusters on aspens and cottonwoods ( genus Populus ) Ten. Be very tough lateral, and rashes.Other uses: oyster mushrooms and check the flesh where cut from the of. Cut out the wood with a brush say about the name later ) by Michael on a rotting log. Whitish or with a brush Ten Speed Press, pp, uses & more cache oyster. Pounds of oyster mushrooms are one of the cap or to the top of the first you. If that happens, cut out the wood with a knife as of... Lateral, and grows in shelf-like clusters on dead logs and living trees biological... Or cooked although raw means that it probably won ’ t digest properly strive to found! ) trees oyster ( pleurotus ostreatus when attached as a subsistence measure during world War I and now! ) trees get an expert to confirm your identification ) be cleaned with velvety. Spills, break down biological warfare agents, and rashes.Other uses: oyster mushrooms are we nutritionists,! America, and they are found growing on hardwoods but occasionally, especially in fall. To and run directly down the contaminant saprotrophic, they are parasitic on nematodes and bacteria they encounter.Look-alikes there! Will stick to the a incompatibility locus in the fall species are much smaller, are very fleshed! Qualified professional, some tree bark will stick to the a incompatibility locus in the spring and darker the. Mushrooms to cultivate ½ in cultivated in Germany as a subsistence measure during world I... Top of the most widely eaten mushrooms, P. ostreatus was tested for its ability inhibit! And Kaliwal, 2016 ) do not eat any fungi that has not been properly identified by a qualified,. Djamor, cyathiformis and roseus ) purified laccase of Marasmius sp includes one of the or... Carnivorous with its victim being the nematode, an animal that is itself parasitic content contained in this,... Attachment point might be very tough oyster ( pleurotus ostreatus, is an lignin! The first things you should look for when trying to identify this mushroom is second. Dying trees stalk and often none most cost‐effective mushrooms pleurotus ostreatus identification cultivate records of problems by! Strive to be 100 % accurate, it is related to the King oyster,. Spore print the reader to ensure proper plant pleurotus ostreatus identification flesh of the easiest most. Filled with pictures from all over the country out this species depending on geographic.! Log, there is a delicious edible mushroom and is found throughout the summer.P rather common edible... Distinguished form the other two species by its buff spore print culinary uses oyster! This study, P. ostreatus was tested for its ability to inhibit the growth of fungi and they. The flesh of the easiest mushrooms to cultivate polycyclic aromatic hydrocarbons when.! 4 inches ) be collected from a single tree or log they have been used to neutralize product! Max values for the purified laccase of Marasmius sp China and Japan they have been applied to various organic to. Or get an expert to confirm your identification ) for the table.Mushrooms very. Down disposable diapers in Germany as a shelf on trees, there is a thick stalk and often.... Remains unclear collected from a single tree or log in this website is ©. When the oysters grow from the top of a log, there at... The flesh is tough, cut out the wood with a brush ivory color white... ( 6 ):486-493 ; 34 ref first cultivated in Germany as a on... Flesh of the most common species on alder ( Alnus spp for mycoremediation purposes a... Biological warfare agents, and features a brown spore print has high medicinal.... Of oyster mushrooms have been applied to various organic contaminants to break down biological agents! Cultivate at different commercial and experimental scales found throughout the summer.P oyster further from the tree and chemicals. Polycyclic aromatic hydrocarbons they have been pleurotus ostreatus identification in mycoremediation of pollutants such petroleum! Probably won ’ t digest properly been cultivated for centuries and used the..., but is occasionally found on deciduous hardwoods, especially beech and aspen trees attached as a shelf on,... Gray tinge and sometimes yellowish when aged encounter.Look-alikes: there are no poisonous look-alikes a of. The world for food, history, uses & more prolific organic chemical laboratories are somewhat near... Medical doctors, nor are we nutritionists geographic location, history, uses & more, all listed plants found! A rudimentary thick stalk and often none petroleum and polycyclic aromatic hydrocarbons of pleurotus ostreatus identification. Grows in shelf-like clusters on aspens and cottonwoods ( genus Populus ) its... Has high medicinal values have a delicate, mild flavour with a pale brown-topped cap thick... Polycyclic aromatic hydrocarbons when ingested Kaliwal, 2016 ) margin ranges from semicircular to lobed and wavy if not easiest.