Mica Cap vs Shaggy Mane
Coprinellus micaceus compared with Coprinus comatus — how to tell them apart in the field.
How to Tell Them Apart
Much larger (cap 5–15 cm tall), white with shaggy recurved scales. Grows singly or in small groups in lawns and disturbed soil, not typically in dense clusters on stumps. Also deliquesces into black ink but is unmistakable due to its tall, cylindrical, scaly white cap.
Side-by-Side Identification
| Trait | Mica Cap | Shaggy Mane |
|---|---|---|
| Cap | 1–4 cm across. Egg-shaped to cylindrical when young, expanding to bell-shaped (campanulate) and finally flattening with age. Surface tawny-brown to date-brown, paler toward the margin, with a darker rusty-brown center. Young caps covered in fine, glistening, mica-like granules (veil remnants) that are easily washed off by rain. Margin becomes striate and eventually splits and curls upward as the cap deliquesces. Flesh thin and fragile. | 4–15 cm tall, 3–5 cm wide. Cylindrical and egg-shaped when young — like a white bullet or closed umbrella. Surface covered in recurved, shaggy scales (hence the name). White when fresh, developing pinkish-brown tones as it matures. The bottom edge begins to turn black and curl upward as autodigestion starts. |
| Gills | Crowded and narrowly attached (adnate) to nearly free. White when very young, quickly progressing through pale tan to brown, then dark brown, and finally black as they liquefy (deliquesce) from the margin inward. The black inky liquid is loaded with mature spores. | Crowded and free. White at first, turning pink, then black as the ink process begins. The gills literally melt from the bottom edge upward — if the edges are already black and dripping, you're too late. |
| Stem | 4–10 cm tall, 2–5 mm thick. White to pale cream, smooth or finely silky. Hollow. Fragile and easily broken. No ring, though very young specimens may show a faint fibrillose zone. Base may be slightly swollen where multiple stems are fused together in a cluster. | 10–20 cm tall, 1–2 cm thick. White, smooth, hollow. Has a small, movable ring that often slides to the base or falls off entirely. Separates cleanly from the cap. |
| Spore print | Dark brown to black. | Dark brown to black. |
| Odor | Mild, not distinctive. Faintly mushroomy. | Pleasant and mild when fresh. Smells faintly sweet or mushroomy — nothing off-putting. |
| Habitat | Saprotrophic on dead or buried hardwood — stumps, roots, fallen logs, and old timber. Commonly found at the base of deciduous trees (especially elm, oak, beech, and ash), along roadsides, in parks, gardens, cemeteries, and disturbed urban areas. Almost always grows in dense clusters of 10 to 100+ fruiting bodies. Can also appear in lawns or flower beds where buried wood is present beneath the soil. | Disturbed ground is the magic word. Lawns, roadsides, gravel paths, compost piles, construction sites, and the edges of parking lots. Shaggy Manes are saprobic — they eat dead organic matter in the soil. They especially love compacted or recently disturbed earth and often show up after rain in places you'd never expect a gourmet mushroom. |
| Season | Spring through late autumn, typically April through November in temperate regions. Can fruit year-round in mild climates. Peak fruiting in autumn. Often produces multiple flushes from the same buried wood source throughout the season. | Late summer through late autumn. Peak season is September–November in temperate regions. Can appear earlier in cooler climates or after heavy summer rains. |
Found one of these in the wild? Don't rely on memory — identify it from a photo with Orangutany and check it against both species before you touch it.