Gymnopilus     Genus

This is a key to gilled mushrooms, that is, mushrooms having a definite cap with a fertile surface consisting of gills. The fruiting body usually also has a stem, although that may be lateral or absent (usually, then, the mushroom is growing from wood). You can use this key to identify mushrooms that you find.

Fruiting body containing fibers (usually in the stalk)

Gills not free
Spore print tan, orange, deep ochre, yellowish olive, olive brown, rusty or cinnamon brown or deep brown
Ring usually either absent or not membranous

Growing on wood

Medium To Big Lignicolous Brown Spored     Subfamily Cap usually more than 2" across, and sometimes up to 8; usually tan, yellow, or pumpkin-colored

Links from Look-alikes Leprocybe     Subgenus Not sticky anywhere Cap not hygrophanous Fruiting body husky, with duller olive, yellow, yellowish or orangish brown coloration

Gymnopilus     Genus     Karsten

Diagnosis

• Spore print orange, rusty orange, or bright rusty brown
  
• Entire fruiting body some shade of pumpkin-color or golden yellow; some species with tints or patches of other colors, or with tiny differently colored scales.
  
• A drop of ammonia or KOH will stain the cap blackish
  
• Flesh typically yellow
  
• Taste typically bitter
  
• Often growing cestipose

Comments

Narrow down your identification:

Cap usually up to 3" across, but may be up to 9"; with a bluish green tinge and/or with various bluish green, pink, or vinaceous patches; scurfy in age, with the scales getting darker than the rest of the cap
Partial veil leaving an evanescent band of fibers on the stalk

Cap up to 2 3/4" across; pumpkin-colored; slightly scurfy and cracking slightly in age
No partial veil
Odor sometimes like potatoes
Gill edges fringed with cheilocystidia
Yellowish mycelium at the base of the stalk

Cap up to 5" across; margin inrolled and remaining so well into maturity; covered with vinaceous scales
Partial veil persistent, fibrillose to cottony

Cap up to 4" across; golden yellow; glabrous, sometimes minutely scurfy on the disk in age
Stature robust
Gills emarginate or sinuate in maturity
Partial veil persistent, fibrillose to cottony
Odor sweet, sometimes anise-like

Cap up to 2" across; golden yellow; glabrous
Stature gracile
Partial veil white, fibrillose, evanescent
Gills yellow at first, then becoming dotted with rusty spots

Cap up to 2" across; golden yellow; scurfy
Stature gracile
Partial veil yellow, fibrillose, evanescent

Cap with no upper limit on size; pumpkin-colored; glabrous, sometimes minutely scurfy in age
Partial veil persistent, fibrillose to cottony
Odor sometimes like anise
On hardwood

Cap up to 2 3/4" across; amber-brown; glabrous
On the ground under conifers

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