|Illustration of a half-free morel, 1799|
Mitrophora semilibera (DC.) Lév (1846)
cap is conicalor ovate
|hymenium attachment is irregular or not applicable|
|stipe is bare|
spore print is creamto yellow
ecology is mycorrhizalor saprotrophic
DNA analysis has shown that the half-free morels, which appear nearly identical on a macroscopic scale, are a cryptic species complex, consisting of at least three geographically isolated species. Because de Candolle originally described the species based on specimens from Europe, the scientific name M. semilibera should be restricted to the European species. In 2012, Morchella populiphila was described from western North America, while Peck's 1903 species name Morchella punctipes was reaffirmed for eastern North American half-free morels. M. semilibera and the other half-free morels are closely related to the black morels (M. elata and others).
A proposal has been made to conserve the name Morchella semilibera against several earlier synonyms, including Phallus crassipes, P. gigas and P. undosus. These names, sanctioned by Elias Magnus Fries, have since been shown to be the same species as M. semilibera.
- Kuo M. (April 2006). "Half-free morels (Morchella species)". MushroomExpert.com. Retrieved 2011-04-18.
- Gibson, Ian (2009). "Morels & False Morels of the Pacific Northwest: An Introduction". Pacific Northwest Key Council. Retrieved 2011-04-18.
- 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.
- O'Donnell K, Rooney AP, Mills GL, Kuo M, Weber NS, Rehner SA (Mar 2011). "Phylogeny and historical biogeography of true morels (Morchella) reveals an early Cretaceous origin and high continental endemism and provincialism in the Holarctic". Fungal Genetics and Biology. 48 (3): 252–265. PMID 20888422. doi:10.1016/j.fgb.2010.09.006.
- Moreau PA, Bellanger JM, Clowez P, Courtecuisse R, Hansen K, Knudsen H, O'Donnell K, Richard F (2014). "Proposal to conserve the name Morchella semilibera against Phallus crassipes, P. gigas and P. undosus" (PDF). Taxon. 63 (3): 677–8. doi:10.12705/633.20.
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