FIG 1.

Maximum likelihood (ML) phylogenetic analysis of 75 species in the genus Morchella based on a four-gene data set (ITS plus EF1-α plus RPB1 plus RPB2), with Verpa and Disciotis as outgroups. The species Morchella castaneae, M. vulgaris, and Morchella sp. Mes-28 were not included in this analysis because only ITS sequences for them are available from GenBank. The ML analyses were run in PhyML 3.0 using the GTR+I+G model of molecular evolution. The numbers by the nodes represent branch support >75%. Mating-type genes detected and sexual reproduction modes known in the species of Morchella are listed on the right. (Photo of M. rufobrunnea of the Rufobrunnea clade courtesy of Michael Loizides, reproduced with permission.)