TABLE 1. Selected traits comparison of Pakistani collections with closely related species.
Taxon Name Stipe diameter (mm) Pileus diameter (mm) Pileus texture and color Basidiospores dimensions (µm) Basidiospores morphology Basidia (µm) Habitat
Agaricus karakensis sp. nov. 30–50 20–60 Dry surface, Sub–plane to flat at maturity, edibility unknown off–white color 7.2–10 × 5.5–7.5 Smooth walled, non-amyloid, apiculate, amygdliform, monoguttulate spores, dark brown coloration, 26.2–34.1 × 11.1–14.2 Found in tropical habitat during monsoon season on dump as well as at the base of boundary wall
Agaricus bitorquis 20–25 30–70 Fleshy, convex to broadly convex with fibrillose scales, edible white–brownish coloration 6.9–7.9 × 5.5–6.4 Dark brown, ellipsoidal basidiospores 22–38 × 5–11 Hypogean in pasture or lawn and gregarious
Agaricus subperonatus 50–120 60–150 Initially spherical then turn broadly convex at maturity, covered with brown scale, greenish pink to dark brown gills, brown color 4.8–6 × 5.5–7.5 Smooth walled, ellipsoidal 6–7.5 ×17–18.5 Mostly found in woodland, under tree shade and along the roadside, mostly rise in group form