Denver-Boulder Metro Area: Fungi, Lichen, Algae, and Slime Molds

This guide contains fungi, lichens, algae, and slime molds that can be found in the Denver-Boulder Metro Area, including Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, and Jefferson Counties.

Poplar Rust ¹
Melampsora medusae

Willow Rust ²
Melampsora epitea

Western Gall Rust ³
Cronartium harknessii

spruce witch's broom rust ⁴
Chrysomyxa arctostaphyli

tongues of fire ⁵
Gymnosporangium clavariiforme

Juniper-hawthorn rust ⁶
Gymnosporangium globosum

juniper-apple rust ⁷
Gymnosporangium juniperi-virginianae

thistle rust ⁸
Puccinia punctiformis

Mustard Flower Rust ⁹
Puccinia monoica

Gold Dust Waxy Cap ¹⁰
Hygrophorus chrysodon

Larch Waxy Cap ¹¹
Hygrophorus speciosus

rosy woodwax ¹²
Hygrophorus pudorinus

Witch's Hat ¹³
Hygrocybe conica

Fairy Ring Marasmius ¹⁴
Marasmius oreades

Lilac Bonnet ¹⁰
Mycena pura

Honey Mushroom ¹⁵
Armillaria mellea

Armillaria solidipes ¹⁶

Flammulina populicola ¹⁰

Velvet Foot ¹⁷
Flammulina velutipes

pinelitter gingertail ¹⁰
Xeromphalina cauticinalis

Oak-leaf Pinwheel ¹⁸
Collybiopsis quercophila

Cluster Cap ¹⁹
Connopus acervatus

Banded Mottlegill ²⁰
Panaeolus cinctulus

Mower's Mushroom ¹¹
Panaeolus foenisecii

Petticoat Mottlegill ²¹
Panaeolus papilionaceus

Shiny Mottlegill ²²
Panaeolus semiovatus

Panaeolus subbalteatus ¹¹

Sandy Stilt-puffball ²³
Battarrea phalloides

Shield Dapperling ²¹
Lepiota clypeolaria

Stinking Dapperling ²⁴
Lepiota cristata

Crucibulum cyathiforme ¹⁹

Common Bird's-Nest ²⁵
Crucibulum laeve

field bird's nest fungus ²⁶
Cyathus olla

dung-loving bird's nest fungus ²⁷
Cyathus stercoreus

deceiver ¹⁰
Laccaria laccata

Laccaria nobilis ¹⁶

Funeral Bell ²⁸
Galerina marginata

Common Fieldcap ²⁹
Agrocybe pediades

Spring Fieldcap ¹⁰
Agrocybe praecox

Destructive Pholiota ³⁰
Hemipholiota populnea

reddening lepiota ³¹
Leucoagaricus americanus

smoky dapperling ¹⁰
Leucoagaricus barssii

White Dapperling ³²
Leucoagaricus leucothites

Meadow Mushroom ³³
Agaricus campestris

The Prince ¹⁰
Agaricus augustus

Yellow Stainer ¹⁴
Agaricus xanthodermus

White Button Mushroom ²³
Agaricus bisporus

Pavement Mushroom ³⁴
Agaricus bitorquis

Salty Mushroom ³⁵
Agaricus bernardii

Blushing Wood Mushroom ³⁶
Agaricus sylvaticus

Agaricus sylvaticus occidentalis ¹⁹

green-spored parasol ³⁷
Chlorophyllum molybdites

Shaggy Parasol ³⁸
Chlorophyllum brunneum

Shaggy Parasol ³⁹
Chlorophyllum rhacodes

flowerpot parasol ⁴⁰
Leucocoprinus birnbaumii

onion-stalk parasol ⁴¹
Leucocoprinus cepistipes

Peeling Puffball ⁴²
Lycoperdon marginatum

common puffball ¹⁰
Lycoperdon perlatum

Meadow Puffball ⁴³
Lycoperdon pratense

Western Giant Puffball ⁴⁴
Calvatia booniana

Sculpted Puffball ⁴⁵
Calvatia sculpta

Pear-shaped Puffball ⁴⁶
Apioperdon pyriforme

Cortinarius pinguis ¹⁰

Sulphur Tuft ⁴⁷
Hypholoma fasciculare

Chip Cherries ⁴⁸
Leratiomyces ceres

Mulch Maids ¹⁴
Leratiomyces percevalii

Garland Roundhead ⁴⁷
Stropharia coronilla

Conifer roundhead ¹⁰
Stropharia hornemannii

Wine-cap Stropharia ⁴⁹
Stropharia rugosoannulata

shaggy scalycap ⁵⁰
Pholiota squarrosa

Shaggy Mane ⁵¹
Coprinus comatus

milky conecap ¹⁰
Conocybe apala

yellow fieldcap ¹⁰
Bolbitius titubans

Pale Brittlestem ⁵²
Candolleomyces candolleanus

Common Ink Cap ⁵³
Coprinopsis atramentaria

Magpie Inkcap ⁵⁴
Coprinopsis picacea

scaly ink cap ⁵⁵
Coprinopsis variegata

Snowy Inkcap ⁵⁶
Coprinopsis nivea

pleated inkcap ⁵⁷
Parasola plicatilis

flocculose inkcap ⁵⁸
Coprinellus flocculosus

mica cap ⁵⁹
Coprinellus micaceus

Pearly Powdercap ⁶⁰
Cystoderma carcharias

Poplar-loving Ringless Amanita ⁶¹
Amanita populiphila

grisette ⁶²
Amanita vaginata

Fly Agaric ⁶³
Amanita muscaria

Panthercap ⁶⁴
Amanita pantherina

Small Funnel-Veil Amanita ⁵⁵
Amanita multisquamosa

Stubble Rosegill ¹⁰
Volvopluteus gloiocephalus

Goldleaf Shield ¹⁰
Pluteus romellii

Silky Rosegill ⁶⁵
Volvariella bombycina

Collybia pinastris

Brownit ⁵⁸
Clitocybe brunneocephala

Aniseed Funnel ⁶⁶
Clitocybe odora

Necklace Tricholoma ⁶⁷
Tricholoma focale

Tricholoma vaccinum ⁶⁷

Soapy Trich ¹⁰
Tricholoma saponaceum

Western Matsutake ¹⁰
Tricholoma murrillianum

Large White Leucopax ¹⁰
Leucopaxillus albissimus

Catathelasma ventricosum ⁶⁸

Stinking Orange Oyster ⁶⁹
Phyllotopsis nidulans

Edited by Colorado Parks and Wildlife, some rights reserved (CC BY-SA)

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Denver-Boulder Metro Area: Fungi, Lichen, Algae, and Slime Molds

Poplar Rust 1 Melampsora medusae

Willow Rust 2 Melampsora epitea

Western Gall Rust 3 Cronartium harknessii

spruce witch's broom rust 4 Chrysomyxa arctostaphyli

tongues of fire 5 Gymnosporangium clavariiforme

Juniper-hawthorn rust 6 Gymnosporangium globosum

juniper-apple rust 7 Gymnosporangium juniperi-virginianae

thistle rust 8 Puccinia punctiformis

Mustard Flower Rust 9 Puccinia monoica

Gold Dust Waxy Cap 10 Hygrophorus chrysodon

Larch Waxy Cap 11 Hygrophorus speciosus

rosy woodwax 12 Hygrophorus pudorinus

Witch's Hat 13 Hygrocybe conica

Fairy Ring Marasmius 14 Marasmius oreades

Lilac Bonnet 10 Mycena pura

Honey Mushroom 15 Armillaria mellea

Velvet Foot 17 Flammulina velutipes

pinelitter gingertail 10 Xeromphalina cauticinalis

Oak-leaf Pinwheel 18 Collybiopsis quercophila

Cluster Cap 19 Connopus acervatus

Banded Mottlegill 20 Panaeolus cinctulus

Mower's Mushroom 11 Panaeolus foenisecii

Petticoat Mottlegill 21 Panaeolus papilionaceus

Shiny Mottlegill 22 Panaeolus semiovatus

Sandy Stilt-puffball 23 Battarrea phalloides

Shield Dapperling 21 Lepiota clypeolaria

Stinking Dapperling 24 Lepiota cristata

Common Bird's-Nest 25 Crucibulum laeve

field bird's nest fungus 26 Cyathus olla

dung-loving bird's nest fungus 27 Cyathus stercoreus

deceiver 10 Laccaria laccata

Funeral Bell 28 Galerina marginata

Common Fieldcap 29 Agrocybe pediades

Spring Fieldcap 10 Agrocybe praecox

Destructive Pholiota 30 Hemipholiota populnea

reddening lepiota 31 Leucoagaricus americanus

smoky dapperling 10 Leucoagaricus barssii

White Dapperling 32 Leucoagaricus leucothites

Meadow Mushroom 33 Agaricus campestris

The Prince 10 Agaricus augustus

Yellow Stainer 14 Agaricus xanthodermus

White Button Mushroom 23 Agaricus bisporus

Pavement Mushroom 34 Agaricus bitorquis

Salty Mushroom 35 Agaricus bernardii

Blushing Wood Mushroom 36 Agaricus sylvaticus

green-spored parasol 37 Chlorophyllum molybdites

Shaggy Parasol 38 Chlorophyllum brunneum

Shaggy Parasol 39 Chlorophyllum rhacodes

flowerpot parasol 40 Leucocoprinus birnbaumii

onion-stalk parasol 41 Leucocoprinus cepistipes

Peeling Puffball 42 Lycoperdon marginatum

common puffball 10 Lycoperdon perlatum

Meadow Puffball 43 Lycoperdon pratense

Western Giant Puffball 44 Calvatia booniana

Sculpted Puffball 45 Calvatia sculpta

Pear-shaped Puffball 46 Apioperdon pyriforme

Sulphur Tuft 47 Hypholoma fasciculare

Chip Cherries 48 Leratiomyces ceres

Mulch Maids 14 Leratiomyces percevalii

Garland Roundhead 47 Stropharia coronilla

Conifer roundhead 10 Stropharia hornemannii

Wine-cap Stropharia 49 Stropharia rugosoannulata

shaggy scalycap 50 Pholiota squarrosa

Shaggy Mane 51 Coprinus comatus

milky conecap 10 Conocybe apala

yellow fieldcap 10 Bolbitius titubans

Pale Brittlestem 52 Candolleomyces candolleanus

Common Ink Cap 53 Coprinopsis atramentaria

Magpie Inkcap 54 Coprinopsis picacea

scaly ink cap 55 Coprinopsis variegata

Snowy Inkcap 56 Coprinopsis nivea

pleated inkcap 57 Parasola plicatilis

flocculose inkcap 58 Coprinellus flocculosus

mica cap 59 Coprinellus micaceus

Pearly Powdercap 60 Cystoderma carcharias

Poplar-loving Ringless Amanita 61 Amanita populiphila

grisette 62 Amanita vaginata

Fly Agaric 63 Amanita muscaria

Panthercap 64 Amanita pantherina