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Page number:378 
Description type:Culture description 
Description:Agrocybe cylindrica ( DC: Fr.) Maire, Mem. Soc. Scie. Nat. du Maroc 45: 106. 1938
Macroscopic characters: growth moderate, dishes covered at the 3rd week. Margin even. Mat homogeneously silky, white. Dark brown zones develop around the inoculum and scatter on the agar towards the end of the study (Fig. 1). Odor none. Reverse brown in patches corresponding to the colored mycelium.
Oxidase reactions: gallic acid -, without growth; tannic acid -, without growth , tyrosine ++ (yellowish-orange reaction), with growth; guaiacol -, without growth; paracresol -, without growth.
Microscopic characters: Advancing zone and aerial mycelium: generative hyphae clamped, staining in phloxine, hyaline, regularly branched, 1,5(-2)-4(-5) µm diam (Fig. 5, A-B), occasionally diverticulate (Fig. 5, C; chlamydospores terminal or intercalary, elliptic to globose and irregularly shaped, 5-12 x 6-20 µm, with slightly thickened walls, containing many guttate vesicles (Fig. 5, D), produced from subtending thinner hyphae, 1,5-2 µm diam. Hyphae with numerous irregular thick-walled branches, developing a plectenchyma or textura angularis sensu Desjardin (1990). (Fig. 5, E-F), imparting a dark brown color to the mat.
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Material studied: Argentina, Capital Federal, BAFC 2217, 4.IV.94; BAFC 2219, 14. IV.94; BAFC 2220, 28.IV.94; BAFC 2223, 14.IV.94; BAFC 2227, IV.94. All isolates from fruitbodies on standing Acer negundo.
During this study, Agrocybe cylindrica was only found on Acer negundo. It has been recorded in Argentina on the following hosts: Melia azedarach, Populus alba, P. angulata, Robinia pseudoacacia, Brussonettia papyrifera, Quercus sp., Acer negundo, Salix sp., Allophylus edulis, Cupania sp., Phoebe sp., and Maytenus sp. (Singer, 1950; Singer, 1969 and Singer & Digilio, 1952). As the last four ones are native hosts, we assume that this species has escaped to them.
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