An online resource based on the award-winning nature guide

Polypores

Boletes Fruiting

8-25-16  bolete 004Boletes are fleshy terrestrial mushrooms that have sponge-like tubes, not gills, as most mushrooms have, under their caps. (Polypores also have tubes, but are tough and leathery and usually grow on wood.) Spores develop on basidia (club-shaped, spore-bearing structures) which line the inner surfaces of the tubes. Because the basidia are vertically arranged, the spores, when mature, drop down and disperse into the air.

The majority of bolete species are edible, but there are two reasons not to harvest them unless you are with an expert. One reason being that there are some poisonous bolete species. The second reason is that because they are large and fleshy, larvae can often be found inhabiting them, as well as parasites.

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Cinnabar Polypore Fruiting

cinnabar polypore WITH LABEL 082It is very hard to miss a fruiting Cinnabar Polypore (Pycnoporus cinnabarinus) fungus due to its electric red-orange coloration (on both upper and lower surfaces). It is in a group of fungi known as polypores, which usually grow on dead trees, are shaped like shelves, not umbrellas, and have many tiny holes, or pores (as opposed to gills), on their underside, where the spores develop. Cinnabar Polypore is also known as White Rot Fungus, as it breaks down lignin and cellulose in dead trees, causing the rotted wood to feel moist, soft, spongy, or stringy and appear white or yellow. Look for it on dead cherry, birch and beech trees.

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