Comprehensive Description
provided by North American Flora
Poronidulus conchifer (Schw.) Murrill, Bull. Torrey
Club 31 : 426. 1904.
Boletus conchifer Schw. Schr. Nat. Ges. Leipzig 1 : 98. 1822.
Boletus virgineus Schw. Schr. Nat. Ges. Leipzig 1 : 98. 1822. (Type from North Carolina.)
Pileus thin, coriaceous, dimidiate to flabelliform, usually narrowly attached, conchate, springing from a sterile, cup-like structure, which usually appears on the mature sporophore, near the base, 1.5-2X2^X0.1-0.2 cm.; surface white to isabelline, with palelatericeous zones, finely tomentose to glabrous, the sterile portion avellaneous, with narrow, black, concentric lines ; margin thin, concolorous, undulate : context very thin, membranous, white, less than 1 mm. in thickness ; tubes short, about 1 mm. long, thin-walled, white, mouths angular, irregular, 3 to a mm., edges thin, uneven, dentate: spores ellipsoidal, smooth, hyaline.
Type locality : North Carolina.
Habitat : Fallen branches and dead limbs of elm.
Distribution : Eastern Canada to Alabama and west to Kansas.
- bibliographic citation
- William Alphonso MurrilI, Gertrude Simmons BurIingham, Leigh H Pennington, John Hendly Barnhart. 1907-1916. (AGARICALES); POLYPORACEAE-AGARICACEAE. North American flora. vol 9. New York Botanical Garden, New York, NY
