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Page number:251 
Remarks (public):This fungus has apparently not been collected since 1909, but the type and one other collection by W.H. Ballou at the New York Botanical Garden are in good condition and distinctive. Stands of Atlantic white ce-dar have been greatly reduced in New Jersey and it is possible that E. ballouii has become extinct. It is most similar to E. japonicum Imazeki, a species that occurs on hardwoods in Japan. See Gross (1964) for a more complete discussion of both species. 
Description type:Non-original description 
Description:Echinodontium ballouii (Banker) Gross Fig. 118
Mycopathol. Mycol. Appl. 24:5. 1964. Steccherinum ballouii Banker, Torrey Bot. Club Bull. 36:341. 1909.
Basidiocarps perennial, sessile to effused-reflexed, hard and woody, up to 8 x 4 x 2.5 cm; pileus surface blackish-brown, zonate, becoming blackened and rimose with age; margin brown, finely tomentose; under-surface golden yellow when fresh (according to Banker), yellowish-brown to sepia in dried specimens, becoming strongly hydnaceous with teeth up to 1 cm long and 1-2 mm wide, apices acute to obtuse, sometimes branched; context dull brown, hard and woody, faintly zonate, up to 5 mm thick; trama of teeth darker yellowh brown than hymenial layer.
Hyphal system dimitic; contextual generative hyphae thin-walled, hyaline, with clamps and occasional secondary simple septa, with occasional branching, 3.5-4.5 µm in diameter; contextual skeletal hyphae thick-walled to almost solid, brown, darkening slightly in KOH, nonseptate, or with rare clamps, 3.5-4.5 µm in diameter, tramal hyphae of teeth similar.
Cystidia abundant in the stratified hymenium, becoming thick-walled and brownish, apically incrusted, imbedded or projecting to 15 µm, 25-45 x 5-9 µm
Basidia clavate, 4-sterigmate, 20-25 x 6-8 µm, with a basal clamp. Basidiospores ellipsoid, finely echinulate, hyaline, strongly amyloid in Melzer's reagent, 7-8 x 4-6 µm.
Type of rot. Associated with a white rot.
Cultural characteristics. Unknown.
Sexuality. Unknown.
Substrata. Known only on Atlantic white cedar (Chamaecyparis thyoides).
Distribution. Known only from New Jersey.

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