Phylogenetic analysis of the LSU (A) and ITS1 (B) data sets. Unrooted neighbor-joining consensus trees are drawn. Bootstrap values above 50% are indicated. The EMBL accession and NCPF numbers are listed in Table 1. The sequences with EMBL accession numbers AY627305, AY927306, and AY627307 correspond to the D1D2 sequences of the three original C. nivariensis isolates described previously (1), and EMBL accession numbers AY620957, AY620958, and AY620959 correspond to the ITS1 sequences of the three original C. nivariensis isolates described previously (1). EMBL accession number AF313362 corresponds to the D1D2 sequence of a potential C. nivariensis isolate from flowers in Canada (11).