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Key to Laccaria

Vouchers for all collections are on deposit at the Universidad de Costa Rica (USJ) mycological herbarium or Instituto Nacional de Biodiversidad (INB). Duplicates are in the Field Museum (F) and the New York Botanical Garden (NY).

1. Lamellae violaceous to purple when young and fresh

2. Lamellae thick and subdistant; basidiospores subglobose and coarsely echinulate . . . . L. amethystina Cooke

2. Lamellae close to crowded, thin; basidiospores subglobose to ellipsoid, relatively finely echinulate . . . . L. gomezii Mueller & Singer

1. Lamellae flesh color to pinkish when fresh

3. Basidiospores globose; echinulae ›1.5 µm long, ›1.2 µm wide at base . . . . L. ohiensis (Montagne) Singer

3. Basidiospores globose to ellipsoid; echinulae 0.7-2 µm long, up to 1 µm wide at base . . . . L. laccata (Scop.:Fr.) Cooke

SEMs by G. M. Mueller, © 1992