Suillus caerulescens

Suillus caerulescens
Scientific classification
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Agaricomycetes
Order:	Boletales
Family:	Suillaceae
Genus:	Suillus
Species:	S. caerulescens
Binomial name
Suillus caerulescens A.H.Sm. & Thiers (1964)

Suillus caerulescens, commonly known as the douglas-fir suillus ^[1] and fat jack, ^[2] is a species of bolete fungus in the family Suillaceae.

Taxonomy

The species was first described scientifically by American mycologists Alexander H. Smith and Harry D. Thiers in 1964. ^[3]

Phylogenetic relationships of closely related species

S. caerulescens S. lakei S. granulatus S. grevillei S. luteus S. brevipes S. cavipes all other Suillus species

Cladogram of 7 closely related species according to the Open Tree of Life. [4]

Suillus caerulescens Mycological characteristics
	Pores on hymenium
	Cap is convex or flat
	Hymenium is adnate or decurrent
	Stipe is bare or has a ring
	Spore print is brown
	Ecology is mycorrhizal
	Edibility is edible

Description

The cap is yellowish to reddish brown, sometimes with streaks from its darker center. ^[5] It ranges from 4–15 cm (1.5–6 in) in diameter, ^[2] shaped convex to flat, and viscid when wet, ^[6] sometimes with veil remnants on the edge. ^[5] The flesh is yellowish, ^[6] as are the pores. ^[5] The stalk is yellowish to brown, darkening with age, 2–8 cm tall, 1–3 cm wide, and bruises bluish to brownish (often slowly), ^{[1] [7]} especially at the base. ^[6] A faint ring may be present. ^[5]

The flesh can have a lemony flavour. ^[1] The spore print is reddish-brown. ^[2]

• 
  Fruit body examples

Similar species

Suillus lakei is fairly similar, ^[6] as is S. ponderosus . ^[2]

Habitat and distribution

It can be found growing with Douglas-fir trees ^[5] in western North America from October to December. ^[2]

Uses

While edible, it is considered of mediocre ^[1] to poor quality. ^[6]

See also

• List of North American boletes

References

1. Arora, David (1986) [1979]. Mushrooms Demystified: A Comprehensive Guide to the Fleshy Fungi (2nd ed.). Berkeley, CA: Ten Speed Press. pp. 496–97. ISBN   978-0-89815-170-1.
2. Audubon (2023). Mushrooms of North America. Knopf. p. 301. ISBN   978-0-593-31998-7.
3. Smith AH, Thiers HD (1964). A Contribution Toward a Monograph of North American Species of Suillus (Boletaceae). Ann Arbor, Michigan: Lubrecht & Cramer. p. 36. ISBN   978-0-934454-26-1.
4. "[Suillus caerulescens + Suillus cavipes]". Open Tree of Life . Retrieved 2025-01-17.
5. Trudell, Steve; Ammirati, Joe (2009). Mushrooms of the Pacific Northwest. Timber Press Field Guides. Portland, OR: Timber Press. p. 222. ISBN   978-0-88192-935-5.
6. Davis, R. Michael; Sommer, Robert; Menge, John A. (2012). Field Guide to Mushrooms of Western North America. Berkeley: University of California Press. pp. 330–331. ISBN   978-0-520-95360-4. OCLC   797915861.
7. Phillips, Roger (2010). Mushrooms and Other Fungi of North America. Buffalo, NY: Firefly Books. p. 286. ISBN   978-1-55407-651-2.

External links

Suillus caerulescens in Index Fungorum