Suillus collinitus

Suillus collinitus, commonly known as the Slippery Jack, is a species of mushroom belonging to the genus Suillus within the family Suillaceae. This fungus is primarily associated with coniferous trees, especially pine trees, forming symbiotic relationships known as mycorrhizae, which are crucial for nutrient exchange between the soil and the tree roots. Suillus collinitus is characterized by its slimy cap, which can vary in color from brown to yellowish, and its close gills that are often found adhering to the stem.

Description

Suillus collinitus features a distinctive cap that ranges from 5 to 10 cm in diameter, which is initially convex before flattening out with age. The cap's surface is notably slimy or sticky when wet, primarily due to a gelatinous layer that covers it. This layer can be removed in older specimens or during dry weather conditions. The color of the cap can vary significantly, presenting shades of brown, yellow, or olive. Underneath the cap, the spore-bearing surface consists of adnate to decurrent pores that are initially pale yellow but become olive-yellow as the mushroom ages. The stem of Suillus collinitus is typically 4 to 8 cm tall and 1 to 2 cm thick, often featuring a ring or annulus that can be slimy in texture.

The spores of Suillus collinitus are ellipsoid, smooth, and feature a brownish spore print. This species is edible, although not highly regarded due to its slimy texture, which some find unappealing. However, it can be consumed after proper preparation, which usually involves removing the slimy cap surface.

Habitat and Distribution

Suillus collinitus is predominantly found in coniferous forests, especially those dominated by pine trees, where it forms ectomycorrhizal associations. These symbiotic relationships are beneficial for both the fungus and the host tree, as the fungus aids in water and nutrient absorption, while receiving carbohydrates produced by the tree through photosynthesis. Suillus collinitus is widely distributed across Europe and has been found in various parts of North America and Asia, wherever suitable pine forests exist.

Culinary Uses

While Suillus collinitus is considered edible, it is not among the most sought-after wild mushrooms due to its slimy cap. Culinary use typically involves removing the gelatinous layer from the cap and possibly the pores, as they can accumulate grit and other forest debris. Once cleaned, the mushrooms can be cooked in a variety of ways, including frying, boiling, or baking. In some cultures, Suillus collinitus is pickled or dried for later use.

Conservation

As of the current knowledge, Suillus collinitus does not face any immediate threats that would warrant conservation concern. Its widespread distribution and ability to form symbiotic relationships with various pine species ensure its persistence in suitable habitats. However, like many fungi, it could be susceptible to changes in forest management practices, pollution, and climate change, which could affect its habitat and symbiotic partners.

Suillus collinitus
Mycological characteristics
	pores on hymenium
	cap is convex
	stipe has a ring
	spore print is brown
	ecology is mycorrhizal
	edibility: edible

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