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Photo of Suillus pictus EM44 v1.0
Photo credit: Rytas Vilgalys at Duke U.

Suillus pictus (Peck) (Smith & Thiers) is an ectomycorrhizal mushroom-forming fungus in the family Boletaceae. Fruiting bodies of S. pictus have bright reddish caps covered with dry red hairs, enlarged radial pores, whitish cottony partial veil remnants on stipe, and stipe covered by reddish hairs similar to cap. S. pictus fruits under 5-needle (white) pines and is widely distributed across eastern North America, and also occurs in eastern Asia (Japan, China). Based on molecular systematics, its closest related species is S. decipiens, which preferentially fruits under 2-3 needle (yellow, or hard) pines.

 

References:

Kretzer, A., Li, Y. N., Szaro, T., & Bruns, T. D. (1996). Internal transcribed spacer sequences from 38 recognized species of Suillus sensu lato: Phylogenetic and taxonomic implications. Mycologia, 88(5), 776–785.

Miller, Jr., O.K., and H.H. Miller. 2006. North American Mushrooms: A Field Guide to Edible and Inedible Fungi. Falconpress, Guilford, Conn.

Smith, A.H. and Thiers, H.D. (1964) A contribution toward a monograph of North American species of Suillus. Ann Arbor.

Weber, N.S. and A.H. Smith. 1985. A field guide to southern mushrooms. Univ. of Michigan Press, Ann Arbor.

Wu, Q. X., Mueller, G. M., Lutzoni, F. M., Huang, Y. Q., & Guo, S. Y. (2000). Phylogenetic and biogeographic relationships of eastern Asian and eastern North American disjunct Suillus species (fungi) as inferred from nuclear ribosomal RNA ITS sequences. Molecular Phylogenetics and Evolution, 17(1), 37–47.