Entoloma abortivum

Armillaria gallica 57535

Entoloma abortivum, commonly known as the aborted entoloma, shrimp of the woods, or aborted honey mushroom, is a species of mushroom belonging to the family Entolomataceae. This unique fungus has a distinctive life cycle and appearance, which includes both normally developed mushroom caps and a form that appears "aborted", leading to its common name. These aborted forms are irregularly shaped, whitish masses that are often found in association with honey mushrooms (Armillaria spp.), suggesting a parasitic or competitive interaction between the two species.

Description

Entoloma abortivum features two distinct forms: the "normal" mushroom form and the "aborted" form. The normal form has a cap that is 3-10 cm in diameter, convex to flat in shape, with a smooth surface that can vary in color from pinkish-brown to grayish. The gills are adnate to adnexed, and the spore print is pink, a characteristic feature of many entolomas. The stem is typically 2-8 cm long and 1-2 cm thick, often with a slightly swollen base.

The aborted form, which results from the interaction between Entoloma abortivum and Armillaria species, is irregular in shape, and its flesh is white and firm. These forms are thought to be the result of Entoloma abortivum parasitizing or otherwise interfering with the development of Armillaria mushrooms, although the exact nature of their relationship is still a subject of research.

Habitat and Distribution

Entoloma abortivum is found in forests across North America, particularly in eastern regions, from late summer to fall. It grows on the ground, often in groups, in both deciduous and mixed woods. This species is saprotrophic, decomposing dead organic matter, but also displays parasitic tendencies in its interactions with Armillaria species.

Edibility

The aborted forms of Entoloma abortivum are considered edible and are sometimes sought after by foragers. They have a texture and flavor that some compare to seafood, particularly shrimp, which has led to the nickname "shrimp of the woods". However, caution is advised, as the normal form of Entoloma abortivum can cause gastrointestinal upset in some individuals. Proper identification is crucial, as there are toxic look-alikes in the Entoloma genus.

Culinary Uses

In culinary contexts, the aborted forms of Entoloma abortivum are the most commonly used. They can be cooked in a variety of ways, including sautéing, boiling, and frying. These mushrooms are often used in dishes that mimic seafood flavors and textures.

Conservation

As of now, Entoloma abortivum does not face any immediate conservation threats. It is relatively widespread and common in its natural habitat. However, like many fungi, its presence is dependent on the health of forest ecosystems, highlighting the importance of preserving natural habitats.

See Also

• Mushroom hunting
• Mycorrhiza
• Saprotrophic nutrition
• Parasitism