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Mycologia. 2010 Sep-Oct;102(5):1082-8. doi: 10.3852/09-294.

Morchella tomentosa: a unique belowground structure and a new clade of morels.

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  • 1Département des sciences du bois et de la forêt, Faculté de foresterie, de géographie et de géomatique, 1030 avenue de la Médecine, Pavilion C.-E.-Marchand, Université Laval, Québec, QC G1V 0A6, Canada.


Mechanisms involved in post-fire morel fructification remain unclear. A new undescribed belowground vegetative structure of Morchella tomentosa in a burned boreal forest was investigated north of Fairbanks, Alaska. The name "radiscisclerotium" is proposed to define this peculiar and elaborate below-ground vegetative structure of M. tomentosa. Bayesian and maximum parsimony analyses based on ITS rRNA regions and nLSU gene strongly supported a new clade composed of M. tomentosa within the genus Morchella.

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