Porcini

Boletus edulis

Also known as: King Bolete, Penny Bun, Cep

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Edibility edible
Phylum Basidiomycota
Family Boletaceae
Conservation Least Concern, though overharvesting concerns in popular foraging areas

Complete Taxonomy

Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Boletales
Family: Boletaceae
Genus: Boletus
Species: B. edulis

Description

Boletus edulis, the porcini or king bolete, is among the most prized edible wild mushrooms globally. With its distinctive brown cap, thick white stipe, and pore surface instead of gills, it commands premium prices in markets worldwide. Its rich, nutty, earthy flavor intensifies when dried. Porcini form ectomycorrhizal associations with various trees and are found in coniferous and deciduous forests across the Northern Hemisphere.

Physical Characteristics

Cap Shape: Convex when young, becoming flat to cushion-shaped
Cap Color: Brown to reddish-brown, smooth; 7-30 cm diameter
Size: 7-30 cm diameter
Gill Attachment: No gills; has white to olive-yellow pores
Spore Print: Olive-brown
Stipe: Thick, white to pale brown, bulbous, with fine white reticulation; 8-25 cm tall, 2-10 cm thick
Habitat: Mycorrhizal with conifers and hardwoods
Fruiting Season: Late summer through fall

Distribution

Northern Hemisphere; Europe, Asia, North America; introduced in Southern Hemisphere

Habitat

Forms ectomycorrhizal associations with spruce, pine, chestnut, hemlock, and oak in forests and woodland edges.

Ecological Role

Forms essential ectomycorrhizal partnerships with forest trees, facilitating nutrient and water exchange. Important food source for wildlife including deer, squirrels, and insects.

Medicinal & Nutritional Properties

  • High in protein and dietary fiber
  • Rich in B vitamins, especially riboflavin and niacin
  • Contains minerals: selenium, copper, potassium
  • Antioxidant compounds
  • May support cardiovascular health
  • Low in calories and fat

Cultural Significance

Highly valued in European and Asian cuisines for centuries. Subject of intense commercial foraging. Protected in some regions. Central to traditional Italian, French, and Polish cooking. Commands prices of $30-60/pound for fresh, $200-400/pound dried.

Fascinating Facts

  • Name "porcini" means "piglets" in Italian
  • Can weigh over 1 kg (2.2 lbs)
  • Flavor intensifies dramatically when dried
  • Cannot be commercially cultivated
  • Infested with insect larvae in up to 90% of specimens
  • Ancient Romans considered them a delicacy
  • Often exported from Eastern Europe to Western markets
  • Distinguishing from toxic lookalikes requires careful identification