Cortinarius callisteus (Fr.) Fr. 1838

In Great Britain and/or Ireland:
Foodplant / mycorrhiza / ectomycorrhiza
fruitbody of Cortinarius callisteus is ectomycorrhizal with live root of Picea abies
Remarks: Other: uncertain

Foodplant / mycorrhiza / ectomycorrhiza
fruitbody of Cortinarius callisteus is ectomycorrhizal with live root of Pinus sylvestris
Remarks: Other: uncertain

Cortinarius callisteus Fries, Epicr. Myc. 281. 1838
Agaricus callisteus Fries, Syst. Myc. 1: 228. 1821.
Pileus fleshy, campanulate-convex, subumbonate to umbonate, 4-7 (-8) cm. broad; surface glabrous or cuticle at length broken into numerous minute silky scales, moist, apricot-yellow (R) to yellow-ocher (R) when fresh, becoming darker in age and then ochraceous-orange (R) to orange-rufous (R) ; context thick on the disk, abruptly thin on the margin, rather soft and moist, not hygrophanous, concolorous when fresh, the odor slight; lamellae adnate, then-sinuate or broadly emarginate, subdistant, rather broad, subventricose, soon yellow-ocher (R), finally rusty, the edge entire; stipe firm, subcespitose, clavate-bulbous, tapering upward from bulb, 5-9 cm. long, 6-10 mm. thick above, 2-3 times as thick below, stuffed, yellowish within, externally whitish to yellowish at the apex, yellow-ocher (R) or darker elsewhere, often streaked longitudinally with fulvous fibrils; spores subglobose to globose, tuberculate, 7-8.5 X 6-7 m, dark-rusty-brown under the microscope.
Type locality: Sweden.
Habitat: In coniferous forests.
Distribution : New York to Missouri ; Colorado ; also in Europe .

Aureonarius callisteus is a species of agaric fungus in the family Cortinariaceae. The common name of the species is tawny webcap.