Galerina marginata (Deadly Galerina, Galerina autumnalis) [Home] | [Links] | [Gallery] | [Species List] | [Mushroom Books] | [Mushroom Recipes] | [Articles] | [Message Board] Click to enlarge Follow Us Location: Colorado Smell: Mealy Spore Print: Rusty brown Edibility: Deadly Poisonous Color: Brown Habitat: Grows on the rotting wood of dead conifers. They tend to grow close to each other in small groups. They are fairly small around the size of small coins. Description: This is one of the most poisonous mushrooms in known in Colorado. They always grow from wood. They sometimes have a ring on the stem. This is a good reason why it is best to avoid any LBMs (Little Brown Mushrooms). There are so many and they can become very difficult to identify to species. Share