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Literature:
 
Page number:48 
Remarks (internal):The basidia and sterigmata would not rehydrate fully enough to allow measurements to be taken. Maas Geesteranus and Nannfeldt (1969) listed this species as distinct and I agree with those researchers conclusions. 
Description type:Non-original description 
Description:Hydnum leucopus Persoon. 1825. Mycol. Europ. 2:158.
Type specimen (Holotype): [L] France: Chaillet, L-910. 262-524. [!]
Macromorphology (living, fide Persoon, ibid; preserved, mihi): Sporophore: pileus (living): fleshy, campanulate, glabrous or smooth, smoky gray. Pileus (preserved): up to 8.0 cm broad, plane to convex, subtomentose to glabrous, light brown (7E4); context not duplex, azonate, yellowish white (4A2). Stipe (living): thick, ovate; context white. Stipe (preserved): up to 4.0 x 0.2 cm, central, subtomentose or glabrous, scabrous from abortive spines; context not duplex, azonate, concolorous with pileus flesh. Spines (living): slender, grayish to bluish purple with white tips. Spines (preserved): up to 3.0 mm long, subdecurrent, subcrowded, light brown (7E4). Chemical reactions: preserved context olive to nonreactive in KOH or NH4OH. Micromorphology (preserved, mihi): Pileus trama hyphae: up to 13.0 µm diam., inflated, interwoven throughout context, clamped. Stipe hyphae: up to 9.5 µm diam., inflated, interwoven throughout context, clamped. Spine trama hyphae: up to 5.0 µm diam.. clamped. Basidia: Data not obtained: sterigmata data not obtained. Basidiospores: (n=20) 6.0-7.5 x 5.0-5.6 µm (X= 6.59 t 0.50 x 5.32 " 0.22 ,um), subglobose, nodulose, brownish; ornamentation tuberculate, prominent, flattened to exsculpate; hilar appendage oblique.