Agaricus karakensis sp. nov. (Agaricaceae, Agaricales), a new species from Pakistan Author Ullah, Tauseef 0000-0002-0420-9739 Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan Author Ullah, Khetab 0000-0002-0420-9739 Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan Author Kamal, Asif 0000-0002-0420-9739 Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan Author Saba, Malka 0000-0002-0420-9739 Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan text Phytotaxa 2024 2024-07-03 658 2 191 202 http://dx.doi.org/10.11646/phytotaxa.658.2.6 journal article 303622 10.11646/phytotaxa.658.2.6 e5509ffc-0997-4604-85fe-151e1759bcd2 1179-3163 13217642

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