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Asci with a variable number of spores; it seems that any number between 2 and 8 is possible, though most frequently is 6. Spores hialine to pale colored, globose to subglobose, with the following average dimensions: Me = 21.2 × 19.7 µm ; Qe = 1.1 (N=31). This fits very well in the data given in CNALH for the species A. contorta. This also agrees with the microscopy given in J-L Cheype webpage. On the other hand, the British Flora refers distinct values for the spores of the subspecies of A. contorta: subsp. contorta – 20 × 11 µm – and no values are given for the other subspecies subsp. hoffmanniana.