Limacella illinita (Fr. : Fr.) Murrill

Based on spores, clamps, and overall appearance of exsiccata….

…it seems possible we are looking at Limacella sp-CMP0152. We first compared spore measurements from the largest pileus in your collection to all the spore data of section Lubricae (http://www.amanitaceae.org/...). After measuring the default minimum of 20 spores, the following data was obtained: [20/1/1] (4.0-) 4.2-5.5 × (3.0-) 3.1-4.1 (-4.2) μm; Q = (1.20-)1.27-1.44(1.61).

With the use of the WAO sporograph tool we found the closest match to be L. sp-CMP0152, which consequently, is also found in Arizona. The spores of your material are inamyloid, broadly ellipsoid to ellipsoid (rarely elongate), and some were decorated with fine warts. This echinulate appearance was only evident with the use of Nomarski. You will find that L. sp-CMP0152 from Cochise Co. (AZ) was dominantly echinulate and noticeable even without the use of Nomarski.