Fungi encyclopedia
A reference for the fungi you actually find
Each entry describes one species the way you meet it in the field — the cap and its surface, what sits underneath, the stipe and its base, the spore print colour, the substrate it fruits from, and the species most often confused with it.
Rusts, moulds and unusual forms
Oak Leaf Blister
Other Fungi
A Taphrina sac fungus that raises pale, circular, dome-shaped blisters across oak leaves. The bulges are convex above and correspondingly hollowed on the underside.
Spore print · Not applicable
Oakmoss
Other Fungi
A soft, antler-branched lichen with flattened straps that are greenish above and chalky white beneath, forming tufts on oak and other deciduous bark.
Spore print · Not applicable
Peach Leaf Curl
Other Fungi
A spring-active sac fungus that turns unfolding peach and nectarine leaves into thick, crinkled, red or purple puckered blades. A whitish bloom of spore-bearing cells later coats the distorted surface.
Spore print · Not applicable
Pear Trellis Rust
Other Fungi
A two-host rust that paints pear leaves with vivid orange spots backed by tiny lattice-like tubes, while producing gelatinous orange horns on juniper stems in spring.
Spore print · Not applicable (orange spore masses)
Perigord Black Truffle
Other Fungi
A hypogeous ascomycete forming rounded black tubers covered in small pyramidal warts, with a purple-black interior finely marbled by white veins.
Spore print · Not applicable (hypogeous)
Pink Earth Lichen
Other Fungi
A pale grey-white soil crust studded with short white stalks bearing rounded, pale pink heads, common on clay banks and roadside cuttings.
Spore print · Not applicable
Pixie Cup Lichen
Other Fungi
A cup lichen whose stubby grey-green podetia flare into wide goblets with granular, pebbled interiors, rising from a mat of leafy basal scales.
Spore print · Not applicable
Plum Pockets
Other Fungi
A sac fungus that transforms developing plums and sloes into elongated, hollow, stoneless bladders coated in a grey-white bloom. The distorted fruits hang conspicuously among normal ones.
Spore print · Not applicable
Powdered Ruffle Lichen
Other Fungi
A large pale grey lichen with broad ruffled lobes, black eyelash-like cilia along the edges and dense white soredia rimming the wavy margins.
Spore print · Not applicable
Ragbag Lichen
Other Fungi
A loosely attached grey foliose lichen forming ragged, wavy-edged sheets on conifer and birch branches, with margins crumbled into isidia and soredia.
Spore print · Not applicable
Reindeer Lichen
Other Fungi
A pale ash-grey fruticose lichen forming deep spongy mats of repeatedly forked hollow branches, dominant on tundra, heath and open pine woodland floors.
Spore print · Not applicable
Rooting Cauliflower
Other Fungi
A very large cream rosette of curled, ribbon-like lobes rising from a long tapering rooting base attached to conifer roots in western North America.
Spore print · White to pale yellow
Rose Black Spot
Other Fungi
A leaf-inhabiting sac fungus that marks rose foliage with sooty black spots bearing radiating, feathered margins and yellow haloes. Affected leaves yellow and drop from the base of the plant upward.
Spore print · Not applicable
Rose Rust
Other Fungi
A rose-specific rust that speckles leaf undersides with orange pustules from late spring, replacing them with sooty black telia by autumn.
Spore print · Not applicable (orange then black spore masses)
Scarlet Caterpillarclub
Other Fungi
A small bright orange club fungus that grows out of the buried pupa or larva of a moth. Digging carefully beneath the club reveals the orange-stained insect from which it arises.
Spore print · White
Smooth Rock Tripe
Other Fungi
A broad, leathery brown lichen that hangs from shaded rock faces by a single central holdfast, curling and crisping to grey-brown when dry.
Spore print · Not applicable
Star Rosette Lichen
Other Fungi
A small, neat grey foliose lichen forming star-like rosettes of narrow radiating lobes, usually crowded with black, often frosted apothecia.
Spore print · Not applicable
Summer Truffle
Other Fungi
A widespread hypogeous ascomycete with a black exterior of large, coarse pyramidal warts and a pale hazel-brown interior broadly marbled with white veins.
Spore print · Not applicable (hypogeous)
Tree Lungwort
Other Fungi
A large leafy lichen whose deeply ridged and pitted lobes resemble lung tissue, growing on the trunks of veteran broadleaf trees in humid, long-established woodland.
Spore print · Not applicable
Trumpet Lichen
Other Fungi
A cup lichen with slim, gradually flaring goblets dusted all over in fine flour-like soredia, rising from a mat of small grey-green basal scales.
Spore print · Not applicable
Western Gall Rust
Other Fungi
A rust of hard pines that swells branches into round woody galls which split each spring and release clouds of bright orange spores.
Spore print · Not applicable (orange spore masses)
Wheat Stem Rust
Other Fungi
The classic cereal rust, forming ragged brick-red pustules along wheat stems that turn coal-black late in the season, with orange cluster-cups on barberry in spring.
Spore print · Not applicable (rusty red spore masses)
White Pine Blister Rust
Other Fungi
A two-host rust that raises orange, blister-like sacs on the bark of five-needle pines and clothes currant leaf undersides with yellow pustules and hair-like brown columns.
Spore print · Not applicable (orange-yellow spore masses)
White-egg Bird's Nest
Other Fungi
A squat, crucible-shaped little cup, tawny-ochre and felty outside with a smooth pale interior, holding neat white disc-shaped 'eggs'. The white peridioles set it apart from the grey and black ones of Cyathus.
Spore print · Not applicable (spores held in peridioles)
Witch's Hair Lichen
Other Fungi
A pale yellowish-green hanging lichen forming soft tangled tresses on conifer branches, distinguished from beard lichens by the complete absence of a central cord.
Spore print · Not applicable
Wolf Lichen
Other Fungi
An unmistakable neon yellow-green shrubby lichen that forms bristly tufts on conifer bark and bare weathered wood in dry mountain forests.
Spore print · Not applicable
Zombie-Ant Fungus
Other Fungi
A parasitic fungus of carpenter ants that manipulates its host into clamping onto vegetation before killing it, then sends a wiry stalk out of the ant's head to release spores over the trail below.
Spore print · Not applicable