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Page number:16 
Description type:Non-original description 
Description:ECHINODONTIUM TSUGICOLA (P. HENN. & SHIRAI) IMAZEKI, Jap. J. Bot. 11: 517. 1935.
Hydnofomes tsugicola P. HENN. & SHIRAI, Bot. Jb. 28: 267. 1901. Illustrations. Figures 12, 13, 14, and 20; see also IMAZEKI (1935), and ITO (1955).
Macroscopic. Basidiocarps (Figs. 12, 13 and 14) lignicolous, perennial, conchate to effused-reflexed, 2-3 imbricate, or solitary, 1-8 x 1-4 x 1-3 cm; upper surface Blackish Brown (3) to Sooty Black, undulating, zonate, rimose-rugose, texture bark-like; margin Saccardo's Umber, 2-3 mm wide, acute, undulating, pubescent, under surface warted and fertile; context Burnt Sienna to Mars Orange, woody, zonate (apparent with hand lens), 0.5-1 cm thick; hymenophore Light Buff, dentate; teeth scattered or adjacent, subulate, up to 1.5 cm long, 1-2 mm in diam, inner tissue Mars Orange, sometimes with a darker core of Burnt Sienna, apices acute to blunt and covered by hymenium.
Microscopic. Context hyphae of two types; skeletal hyphae (Fig. 20e) thick-walled to solid, 3.5-4.5 µm in diam, smooth, brown, turning maroon in KOH solution, rarely nodose-septate, rarely branched; generative hyphae (Fig. 20f) thin-walled, 3.5-4.5 µm in diam, hyaline, smooth, nodose-septate with some secondary simple septa, regularly branched; hyphae of the inner tissue of the teeth similar but frequently branched and frequently nodose-septate; hymenium hyaline; subhymenium stratified, up to 300 µm thick; cystidia (Fig. 20a) subulate to fusiform, 30-40 x 6-10 µm, upper portion incrusted, usually protruding up to 15 µm, originally thinwalled and hyaline, becoming thick-walled (Fig. 20b) and colored similar to skeletal hyphae; basidia (Fig. 20c) clavate, 20-30X 6-8 µm, 4-sterigmate; spores (Fig. 20d) ellipsoid, 5-7 x 4-6 µm, hyaline, strongly amyloid, minutely echinulate to smooth (usually some trace of echinulation visible under oil immersion).
Rot character. Undetermined.
Hosts. Tsuga diversifolia MAST., Tsuga sieboldii CARR., Abies firma SIEB. & ZUCC.
Range. Known from the Prefectures of Nagano and Tochigi. Specimens examined. TYPE-Nikko, Japan, on T. diversifolia, SHIRAI, 10, 1899 (S, TNS); JAPAN- Nikko, Tochigi, on T. diversifolia, AOSHIMA No. 93a, July 20, 1960 (BPI and SY-F).
Discussion. This species is very close to E. tinctorium. However, E. tsugicola has smaller basidiocarps, a harder context, and the teeth are more scattered. Microscopically, the spores of E. tsugicola are slightly smaller and the hyphae are more compactly interwoven. The fungus fruits at branch stubs.
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