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[ Keys & Checklist/Picturebooks ] "Gopher False Caesar"
Technical description (t.b.d.) BRIEF DESCRIPTION: The cap of A. tuza is 70 - 120 mm wide, viscid, smooth, nonappendiculate, with a slightly sulcate margin. The cap is white to yellowish gray. The flesh is white. The volva is thick, white, calyptrate, and sometimes divided into two or more patches. The gills are subadnate to free, white, with floccose edges. The short gills are truncate to subtruncate and rather sparsely(?) and unevenly distributed. The stem is 50 - 150 (-200) x 10 - 25 mm, with white flesh. The thick, membranous, saccate volva is well-developed, and free. The spores measure (8.4-) 10.3 - 15.7 (-25) x (6.3-) 7.5 - 10.2 (-14.0) µm and are cylindric to truncate-conic and inamyloid. Clamps are relatively common at the bases of basidia. This species occurs in Pine (Pinus) and Fir (Abies) forests of central Mexico and was originally described from the State of Mexico. Despite its similarity in macroscopic appearance to species of stirps Caesarea (see A. caesarea (Scop. : Fr.) Pers.) and stirps Hemibapha (see A. hemibapha (Berk. & Broome) Sacc.), A. tuza is currently regarded as somewhat distant from them because cells supporting the basidia are not inflated, or not as well-inflated, as in those groups. Subhymenial structure similar to that of A. tuza is seen in other robust taxa such as A calyptroderma G. F. Atk. & Ballen (stirps Calyptroderma). -- R. E. Tulloss
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