Morchella tomentosa, commonly called the gray, fuzzy foot, or black foot morel, is a species of fungus in the Morchellaceae family. M. tomentosa is a fire-associated species described from western North America, formally described as new to science in 2008.
Morchella tomentosa is identified by its post-fire occurrence, fine hairs on the surface of young fruit bodies, and a thick, "double-walled" stem. It also has unique sclerotia-like underground parts. Color can range from black and "sooty" to gray, brown, yellow, or white, although color tends to progress from darker to lighter with age of the fruiting body. Three other wildfire-adapted morels were described from western North America in 2012: M. capitata, M. septimelata, and M. sextelata. None of these three new species share the hairy surface texture of M. tomentosa.
Based on studies of DNA, M. tomentosa is clearly a distinct species apart from the yellow morels (M. esculenta & ssp.) and black morels (M. elata & ssp.). Mushroom collectors also use the common name "gray morel" for M. esculenta-type morels in eastern North America.
- Kuo M. (2008). "Morchella tomentosa, a new species from western North America, and notes on M. rufobrunnea" (PDF). Mycotaxon. 105: 441–6.
- Kuo M. (November 2008). "Morchella tomentosa". MushroomExpert.com. Retrieved 2011-03-20.
- McFarlane EM, Pilz D, Weber NS (2005). "High-elevation gray morels and other Morchella species harvested as non-timber forest products in Idaho and Montana" (PDF). Mycologist. 19 (2): 62–8. doi:10.1017/S0269915X0500203X.
- Stefani FO, Sokolski S, Wurtz TL, Piché Y, Hamelin RC, Fortin JA, Bérubé JA (2010). "Morchella tomentosa: a unique belowground structure and a new clade of morels" (PDF). Mycologia. 102 (5): 1082–8. PMID 20943507. doi:10.3852/09-294.
- Kuo M, Dewsbury DR, O'Donnell K, Carter MC, Rehner SA, Moore JD, Moncalvo JM, Canfield SA, Stephenson SL, Methven AS, Volk TJ (11 April 2012). "Taxonomic revision of true morels (Morchella) in Canada and the United States". Mycologia. 104 (5): 1159–77. PMID 22495449. doi:10.3852/11-375.
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