Agaricus andrewii Freeman False Meadow Mushroom Cap 2-6cm across, convex then flattened, but with inrolled margin until fully mature; pure white, to cream when old; smooth, silky-fibrillose, margin of cap with floccose remnants of white veil. Gills free, crowded, broad; bright pink when young, then soon chocolate brown, and finally black. Stem 25-50 x 10-15mm, equal to tapered at the base; white; fibrillose to woolly below the faint evanescent ring zone. Flesh firm; white. Odor very pleasant. Taste very pleasant. Spores broadly ellipsoid, 7-8 x 4-5µ. Deposit purplish brown. Marginal cystidia sparse, prominent and turnip-shaped to club-shaped. Habitat As yet the exact distribution of this species is uncertain because of confusion with Agaricus campestris. However, it would appear to be widespread at least in eastern north America as far south as North Carolina. Season late September-November. Edible and choice, it has doubtless been mistakenly collected many times as Agaricus campestris. Comment The more familiar Agaricus campestris lacks any marginal cystidia and may not be as common in America as is usually supposed. Apart from the microscopic differences, Agaricus andrewii would appear to differ hardly at all macroscopically, except that it seems to have a more consistently smooth and purer white cap than Agaricus campestris. |