USDA Forest Service

The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."

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Subject	Scientific Name	Images
abortive Entoloma	Entoloma abortivum	5
Agaric mushroom	Macrolepiota procera	1
alder scalycap	Pholiota alnicola alnicola	4
Amanita mushroom	Amanita spp.	4
American squawroot	Conopholis americana	1
annosum root disease	Heterobasidion annosum	31
Armillaria root rot	Armillaria mellea	4
Armillaria root rot	Armillaria solidipes	4
Armillaria root rot	Armillaria tabescens	3
Armillaria root rots	Armillaria spp.	16
artist's conk	Ganoderma applanatum	30
ash heart rot	Perenniporia fraxinophila	9
Atropellis canker	Atropellis pinicola	1
beech bark canker	Neonectria coccinea var. faginata	1
beech bark disease	Nectria coccinea	2
birch bolete	Leccinum scabrum scabrum	3
birch conk	Piptoporus betulinus	8
bird's nest fungi	Cyathus striatus	6
black knot	Apiosporina morbosa	4
black morel	Morchella elata	1
black root rot	Xylaria polymorpha	5
black trumpet	Craterellus fallax	3
black witch's butter	Exidia glandulosa	5
blue stain	Chlorociboria aeruginascens	2
Bolete mushrooms		1
Boletus mushroom	Boletus spp.	1
Bondarzewia berkeleyi	Bondarzewia berkeleyi	2
bracket fungus	Fomitopsis rosea	1
British soldier lichen	Cladonia cristatella	1
brown spot needle blight of pine	Mycosphaerella dearnessii	2
canker and die back of Siberian Elm	Tubercularia ulmea	1
canker rot	Cerrena unicolor	9
canker rot	Phellinus everhartii	6
carbon balls	Daldinia concentrica	6
cedar-apple rust	Gymnosporangium juniperi-virginianae	22
Cenangium limb canker	Cenangium ferruginosum	1
ceramic parchment	Xylobolus frustulatus	1
chanterelle	Cantharellus cibarius	3
cleft-foot amanita	Amanita brunnescens	1
clinker polypore	Inonotus obliquus	16
Clitocybe fungus	Clitocybe squamulosa	2
Clitocybe root diseases	Clitocybe spp.	3
clubmoss	Lycopodiella spp.	2
common bird's nest fungi	Crucibulum laeve	1
common dung cup	Peziza vesiculosa	1
common greenshield lichen	Flavoparmelia caperata	3
common puffball	Lycoperdon perlatum	4
coronado limb rust	Cronartium arizonicum	1
Cortinarius mushrooms	Cortinarius spp.	1
crested coral	Clavulina coralloides	3
crown coral mushroom	Clavicorona pyxidata	1
Cryptosphaeria cankers	Cryptosphaeria spp.	1
cup fungi	Peziza repanda	1
cup fungi	Peziza spp.	1
cup mushroom	Humaria hemisphaerica	1
Cyclaneusma needle cast	Cyclaneusma minus	1
Cytospora canker of spruce	Valsa kunzei	1
Cytospora cankers	Cytospora spp.	1
Dasyscypha cankers	Lachnellula spp.	1
death cap mushroom	Amanita phalloides	1
decay		3
delicious milk cap	Lactarius deliciosus	1
destroying angel	Amanita virosa	5
Diplodia blight	Sphaeropsis sapinea	3
dog vomit slime mold	Fuligo septica septica	1
Dothistroma needle blight	Mycosphaerella pini	2
Douglas-fir needlecast	Rhabdocline pseudotsugae	1
Dryad's Saddle	Polyporus squamosus	1
Dutch elm disease (novi-ulmi)	Ophiostoma novo-ulmi	1
ear pick fungus	Auriscalpium vulgare	1
eastern pine gall rust	Cronartium quercuum	4
ectomycorrhizae	Collybia spp.	1
ectomycorrhizae		1
ectomycorrhizae	Pisolithus tinctorius	8
Ectomycorrhizae	Thelephora terrestris	6
elm oyster	Hypsizygus tessulatus	1
Elytroderma needle cast of pine	Elytroderma deformans	1
emetic russula	Russula emetica	1
Eutypella canker	Eutypella parasitica	1
fairy rings		1
false morel	Gyromitra esculenta	4
false parasol or green-spored parasol	Chlorophyllum molybdites	1
false tinder polypore	Phellinus igniarius	14
false turkey tail	Stereum ostrea	4
ferry stool mushroom	Coltricia perennis	1
fiber head	Inocybe spp.	2
fir needle cast	Isthmiella abietis	1
fir needle cast	Lirula abietis-concoloris	1
flooding/high water		1
fly agaric	Amanita muscaria	22
funeral bell	Galerina marginata	1
fusiform rust	Cronartium quercuum f.sp. fusiforme	2
Ganoderma root and butt rot	Ganoderma lucidum	7
Ganoderma root and butt rot	Ganoderma oregonense	2
Ganoderma root rots	Ganoderma spp.	2
gilled polypore	Lenzites betulina	2
gilled polypore	Lenzites spp.	2
golden clavaria	Ramaria aurea	2
golden pholiota	Pholiota aurivella	1
granulated slippery jack	Suillus granulatus	2
Gymnopilus fungi	Gymnopilus spp.	1
Gynosporanium rusts	Gymnosporangium spp.	1
heart rot	Laricifomes officinalis	4
heart rot	Phellinus rimosus	4
heart rot	Pyrofomes demidoffii	1
Hebeloma mushroom	Hebeloma spp.	1
Helvella fungi	Helvella spp.	3
Hemiphacidium fungus	Hemiphacidium planum	1
hemlock varnish shelf	Ganoderma tsugae	10
Hericium fungus	Hericium americanum	1
Hericium fungus	Hericium coralloides	3
hispidus canker	Inonotus hispidus	7
Hymenochaete fungi	Hymenochaete spp.	1
Hypoxylon canker	Annulohypoxylon thouarsianum var. thouarsianum	2
Hypoxylon canker of aspen	Entoleuca mammata	3
Hypoxylon canker of oak	Biscogniauxia atropunctata atropunctata	6
Hypoxylon cankers	Hypoxylon spp.	3
incense cedar broom rust	Gymnosporangium libocedri	1
incense cedar polypore	Tyromyces amarus	2
indian paint fungus	Echinodontium tinctorium	7
inky cap	Coprinus quadrifidus	1
inky cap	Coprinus radians	2
inky cap	Coprinus spp.	4
Inonotus canker	Inonotus radiatus	1
Irpex canker	Spongipellis pachyodon	1
Irpex fungi	Irpex spp.	1
jack-o-lantern mushroom	Omphalotus illudens	3
jelly fungus	Calocera cornea	2
jelly fungus	Dacryopinax spathularia	1
juniper broom rust	Gymnosporangium speciosum	1
king bolete	Boletus edulis	4
lackluster laccaria	Laccaria laccata	2
laminated root disease	Phellinus weirii	2
larch bolete	Suillus grevillei	1
larch needle cast	Hypodermella laricis	2
larch waxy cap	Hygrophorus speciosus	1
Lentinus mushrooms	Lentinus spp.	4
Leucopaxillus giganteus	Leucopaxillus giganteus	1
lichen		3
limb rust	Peridermium filamentosum	2
lion's mane hericium	Hericium erinaceus	7
lobster mushroom	Hypomyces lactifluorum	1
Lophodermium needle casts	Lophodermium spp.	2
Macrophoma rough bark disease	Macrophoma tumefaciens	1
Melampsora rusts	Melampsora spp.	1
milk-white toothed polypore	Irpex lacteus	5
mock oyster	Phyllotopsis nidulans	5
morel	Morchella spp.	2
mossy maple polypore	Oxyporus populinus	3
Nectria canker	Nectria cinnabarina	1
Nectria canker	Nectria galligena	1
Nectria canker	Nectria spp.	1
Neonectria canker	Neonectria galligena	8
northern tooth	Climacodon septentrionalis	15
orange jelly	Dacrymyces palmatus	6
oyster mushroom	Pleurotus ostreatus	11
oyster mushroom	Pleurotus spp.	6
parasol mushroom	Lepiota spp.	1
Perenniporia canker	Perenniporia ellisiana	1
Perenniporia decay	Perenniporia subacida	2
Phellinus fungus	Phellinus gilvus	2
Phellinus heartrots	Phellinus spp.	1
Phomopsis blight	Phomopsis juniperivora	1
pine needle cast	Lophodermella cerina	2
pine needle rust	Coleosporium asterum	6
Pink-tipped coral mushroom	Ramaria botrytis	2
polypore	Globifomes graveolens	1
polypore fungus	Coriolopsis floccosa	1
polypore fungus	Polyporus alveolaris	6
polypore fungus	Polyporus umbellatus	1
polypore fungus	Poronidulus conchifer	5
poplar rust	Melampsora medusae	2
powdery piggyback	Asterophora lycoperdoides	3
puffball	Bovista spp.	3
puffball	Calvatia spp.	2
puffball	Lycoperdon pyriforme	27
purple-red waxy cap	Hygrophorus purpurascens	2
purple-spored puffball	Calvatia cyathiforme	1
Ramaria fungi	Ramaria spp.	5
Rasutoria fungus	Rasutoria abietis	1
red heart decay bleeding fungus	Rigidoporus sanguinolentus	1
red heart of pine	Phellinus pini	7
red polypore	Pycnoporus cinnabarinus	3
red root and butt rot	Inonotus circinatus	1
red-belted fungus	Fomitopsis pinicola	20
resinous polypore	Ischnoderma resinosum	3
righteous red waxy cap	Hygrocybe coccinea	2
Rimosus decay	Phellinus robiniae	2
robustus conk	Phellinus robustus	2
rough-stemmed bolete	Leccinum spp.	3
Russula mushroom	Russula spp.	1
rusty gilled polypore	Gloeophyllum sepiarium	15
scaly pholiota	Pholiota squarrosa	2
scarlet elfcup	Sarcoscypha austriaca	3
Schweinitzii root and butt disease	Phaeolus schweinitzii	25
Scleroderris canker of pine and spruce	Gremmeniella abietina	1
Scleroderris canker of western firs	Grovesiella abieticola	1
Shaggy mane	Coprinus comatus	16
shaggy parasol	Chlorophyllum rhacodes	2
sharp-scaly pholiota	Pholiota squarrosoides	1
shingled hedgehog	Hydnum imbricatum	1
short-stemmed russula	Russula brevipes	1
silverleaf	Chondrostereum purpureum	1
Sirococcus blight of conifers	Sirococcus conigenus	2
slime mold	Lycogala spp.	1
slime mold	Metatrichia vesparium	2
slime mold	Stemonitis spp.	1
smooth patch of oak	Aleurodiscus oakesii	2
sooty-bark canker	Encoelia pruinosa	3
spruce needle cast/blight	Lirula macrospora	1
spruce needle rusts	Chrysomyxa spp.	1
stalactiform blister rust	Cronartium coleosporioides	1
Stigmina leaf spot	Stigmina lautii	5
stinkhorn mushroom	Clathrus spp.	1
stinkhorn mushroom	Phallus impudicus	1
strap coral	Clavariadelphus ligula	3
strict coral mushroom	Ramaria stricta	1
Strumella canker	Strumella coryneoidea	1
Strumella canker	Urnula craterium	1
sulfur shelf	Laetiporus sulphureus	39
Swiss needle cast	Phaeocryptopus gaeumannii	4
tawny grisette	Amanita fulva	1
thick-walled maze polypore	Daedalea quercina	4
thin-walled maze polypore	Daedaleopsis confragosa	2
tinder fungus	Fomes fomentarius	5
Tomentosus root disease	Onnia tomentosus	9
toothed jelly fungus	Pseudohydnum gelatinosum	1
trunk rot	Peniophora rufa	1
trunk rot	Pholiota adiposa	1
trunk rot	Ustulina deusta	1
turkey tail	Trametes versicolor	22
veiled oyster	Pleurotus dryinus	2
veiled polypore	Cryptoporus volvatus	12
velvet foot	Flammulina velutipes	3
Violet-toothed Polypore	Trichaptum biforme	16
waxy cap mushrooms	Hygrocybe spp.	1
weeping conk	Inonotus dryadeus	3
western dwarf mistletoe	Arceuthobium campylopodum	1
western gall rust	Endocronartium harknessii	2
western red rot	Dichomitus squalens	1
white heartwood rot	Phellinus tremulae	14
white pine blister rust	Cronartium ribicola	5
white rot	Inonotus dryophilus	1
white-rot fungus	Trametes pubescens	2
witch's butter	Tremella mesenterica	1
witch's butter	Tremella spp.	1
witch’s hat	Hygrophorus conicus	1
wood decay	Pholiota albocrenulata	2
wood decay	Poria incrassatus	1
wood decay	Schizophyllum commune	8
wood decay	Stereum spp.	7
wood decay and heart rots of hardwoods	Fomes spp.	1
wood ear	Auricularia auricula-judae	3
wood ears	Auricularia spp.	1
wood rot	Bjerkandera adusta	1
woolly chanterelle	Gomphus floccosus	2
Xeromphalina campanella	Xeromphalina campanella	1
Xylaria root rots	Xylaria spp.	1
yellow birch	Betula alleghaniensis	1
yellow cap fungi	Pholiota spp.	9
yellow fairy cups	Bisporella citrina	4
yellow spindle coral	Clavulinopsis fusiformis	1