Name: Fomitopsis dochmia (Berk. & Broome) Ryvarden
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First person to use this name on MO: Erlon Bailey
Editors: Chaelthomas

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Basionym :
Polyporus dochmius Berk. & Broome, Botanical Journal of the Linnean Society 14: 50 (1875) [MB#231528]

Literature :
Ryvarden, L. 1972. A critical checklist of the Polyporaceae in tropical East Africa. Norwegian Journal of Botany. 19:229-238

Brief Description: [See More | Edit]

Literature :
Corner, E.J.H. 1989. Ad Polyporaceas VI. The genus Trametes. Beihefte zur Nova Hedwigia. 97:1-197

Page number : 96
Description type : Non-original description
Description : Trametes dochmia (Berk. et Br.) comb. nov. Plate 1
Polyporus dochmius Berk. et Br., J. Linn. Soc. 14 (1873) 50. – Fomes dochmius (Berk. et Br.) Cooke, Bakshi (1971) 34. – Fomitopsis dochmius (Berk. et Br.) Ryvarden (1972); Ryvarden and Johansen (1980) 338. – Trametes nigroplebeia C.G. Lloyd, Myc. Writ. 7 (1922) 1113.

Pileis -12.5 cm in radius, 25.5 cm wide, sessile, often with a short resupinate foot, dimidiate, applanate then as descending brackets, eventually more or less ungulate, -10 cm high, margin becoming stepped, faintly to distinctly and closely sulcate, generally fairly even but often subrugulose, matt or glabrous, dull, woodbrown then fuliginous to dull black, rarely fuliginous brownish to dark fuscous brown, weathering light greyish drab and minutely scabrid, drying shortly radially rimose and fuliginous blackish, often with faint narrow paler zones; margin obtuse, often thick and tumid in renewed growth, velutinate, pale pinkish buff, rarely whitish.

Tubes -4 mm long in the first season, 0.3-0.5 mm at 5 mm from the margin of the pileus, developing numerous distinct or ill-defined layers, 1-3 mm thick and totalling up to 7 cm thick in old ungulate specimens, with or without intervening layers of flesh 0.3-1 mm thick, old tubes stuffed, concolorous with the flesh; pores 80-120 ? wide, dissepiments 50-200 ? thick, round, entire, rarely 2-4 confluent, white, cream, or pale pinkish buff, often fuliginous in old specimens or spotted fuliginous violaceous by a mould. Flesh 3-12(-25) mm thick at the base of the pileus, 25 mm at 5 mm from the margin, rather thin, floccosofelted but rather compact and coriaceous, not corky, drying rather woody, faintly and closely zoned, pale to rather deep pinkish buff, rarely cartridge buff, with a fuliginous fuscous, slightly horny, ill-defined, superficial crust 0.3-1 mm thick but up to 2.5 mm thick in old massive specimens.

On fallen trunks in the forest. Tropical Asia and Australasia; Malaya, fairly common.

Spores 3.2-4.2 × 1.8-2.2 ?, white, smooth, ellipsoid, aguttate, inamyloid.

Basidia 7-11 × 3.5-4.5 um; sterigmata 4, 2-2.5 ? long. Cystidia and hyphal pegs none. Hyphae trimitic, clamped, not encrusted, not dextrinoid, scarcely swelling in potash; skeletals 4-6(-7) ? wide in the flesh, walls pale pinkish, very thick and glassy, aseptate, unbranched, unlimited or some 500-1000 ? long with endings in the flesh either simple or emitting 2-3 binding hyphae; mediate hyphae short, inconspicuous; binding hyphae 1.5-3 µm wide, laxly to freely branched, not coralloid, sparse to abundant, derived from generative hyphae and some from the ends of skeletals; generative hyphae 1.5-3.5 µm wide, clamped, very transparent; dissepiments densely trimitic with skeletals 3-4.5(-5) µm wide. Surface of pileus with a dense palisade of cylindric to subclavate skeletal ends 4-9 µm wide, the walls becoming fuscous brown to fuliginous and encrusted with brownish matter soluble in potash, not agglutinated, the crust extending inwards into the flesh and becoming invaded by a few binding hyphae, becoming leached by rain, and rimose on drying through lack of agglutination.

Collections: Sing. F.N. 8315, det. Tr. nigroplebeia by Lloyd (cotype); Sing. F.N. 10858, det. Tr. cingulata by Lloyd; Sing. F.N. 19753, det. Polyporus semilaccatus by S.R. Bose; Corner, numerous collections from the Malay Peninsula. – Brunei, Andulai Forest, Corner s.n. Feb. 1959. – North Borneo, mt Kinabalu, Mahmud Valley, 1300 m alt., 10 Aug. 1961, RSNB 1692. – Sarawak, Santubong, Corner s.n. Feb. 1959. – Solomon Islands, Guadalcanal, Tsuva, 9 Sept. 1965, RSS 1791.
Misidentifications: Sing. F.N. 8480 is T. decortican; Sing. F.N. 9176 and 9831 are T. aurora.

This description is drawn from living fruit-bodies and spore-deposits. Dried material has been confused with the species that I recognise as T. aurora and T. semitosta. Spores are not easy to come by. I find them smaller than given by Cunningham (6-7 × 1.5-2 ?) and Lowe (4.5-5 × 2-2.5 ?) as quoted by Ryvarden and Johansen. Cunningham’s description of Osmoporus dochmius leaves much doubt over its identity. According to Bakshi (1971), the species causes a brown rot and breaks wood with irregular cracks in which white or cream-coloured mycelial sheets develop, but the reddish brown heart-wood of Calophyllum inophyllum is turned brick red.

The fruit-bodies are easily recognised from the dull greyish black rimose pileus with pinkish margin, pores and flesh.

Literature :
Carranza-Morse, J.; Gilbertson, R.L. 1986. Taxonomy of the Fomitopsis rosea complex (Aphyllophorales, Polyporaceae). Mycotaxon. 25(2):469-486

Page number : 477
Description type : Non-original description
Description : FOMITOPSIS DOCHMIA (Berk. & Br.) Ryv. Norw. J. Bot. 19:231, 1972.
Fomes dochmius (Berk. & Br.) Cke., Grevillea 14:17, 1885. Osmoporus dochmius (Br.) G.H. Cunn., Polyp. New Zeal., N.Z. Dept. Scient. Ind. Res. Bull. 164, 1965. Polyporus dochmius Berk. & Br., Linn. Soc. Bot. J. 14:50, 1875. Polyporus ferreus Berk., Lond. J. Bot. 6:502, 1847. nom. illegit. non Pers. 1825. Fomes ferreus Berk. : Cke., Grevillea 14:21, 1885. Fomes subferreus Murr., N. Amer. Fl. 9:97, 1908.

Basidiocarps annual, biennial or perennial, solitary or imbricate, sessile or effused-reflexed, dimidiate or attached by a lateral base, corky to woody when dry; pileus applanate, conchate or flabelliform, 3.0-12.0 × 2.0-15.0 × 0.6-3.0 em; upper surface first brownish gray, becoming grayish black and with a distinct crust when old, glabrous, concentrically sulcate, radially wrinkled and cracked, creviced when old, faintly zoned, with some protuberances or warts close to the base; margin acute, thin, even, first velvety, becoming glabrous with narrow sulcate zones, ochraceous, brown or gray; pore surface pinkish gray, cream or tan when old, even, with a sterile border of 3.0-5.0 mm wide; pores round to subdaedaleoid, ochraceous pink or wood color, 5.0-8.0 per mm, dissepiments entire; tubes concolorous with the pore surface, indistinctly stratified, old tubes stuffed with white mycelium, up to 7 mm long; context ochraceous, pale pink, pinkish tan, or wood color, fibrous, up to 1.5 cm thick, sometimes darker than the pores, with a silky sheen and with a dark reaction when touched with KOH.

Hyphal system trimitic; generative hyphae with clamps, thin-walled, branched, hyaline, 2.0-4.0 ? in diam; skeletal hyphae thick-walled, hyaline or yellowish brown, nonseptate, 3.0-7.0 ? in diam; binding hyphae freely branched, thick-walled, branches tapering and tortuous, 2.0-5.0 ? in diam.

Cystidia or other sterile hymenial structures absent, but reported by Bose (in Ryvarden and Johansen, 1980) to be clavate and finely encrusted. Lowe (1957) reported cystidioles 3.0-4.0 ? in diam.

Basidia subclavate, or narrowly clavate, 4-sterigmate, 12.0-19.0 × 4.0-5.0 ?, with a basal clamp.
Basidiospores oblong-ellipsoid, smooth-walled, hyaline, 4.0-6.0 (-7.0) x (1.5) 2.0-2.5 ?, negative in Melzer’s reagent.

Type of rot: Brown cubical rot.

Substrata: On hardwood trees. Reported on Dipterocarpaceae (Shores robusta) and Guttiferae (Mesua ferrea).

Distribution: Central and South America; Caribbean Islands, Asia and Australia.

Literature :
Ryvarden, L.; Johansen, I. 1980. A preliminary polypore flora of East Africa. :1-636

Page number : 338
Description type : Non-original description
Description : FOMITOPSIS DOCHMIUS (Berk. & Br.) Ryv.
Norw. J. Bot. 19:231, 1972. – Polyporus dochmius Berk. & Br. Linn. Soc. Bot. J. 14:50, 1857 (K:). – Polyporus ferreus Berk. Lond. J. Bot. 6:502, 1847. nom. illegit. non Pers. 1825. – Fomes ferreus Berk. ex Cooke Grevillea 14:21, 1885 (K;). – Fomes subferreus Murr. N. Am. Fl. 9:97, 1908 (teste Lowe 1957:69).

FRUITBODY perennial, solitary or imbricate, pileate, more rarely effused reflexed, commonly applanate, more rarely convex, broadly sessile to dimidiate, up to 12 cm wide, 15 cm long-and 3 cm thick at the base, woody hard when dry.

PILEUS first brownish-grey, then greyish-black and finally black with a distinct crust, when greyish finely adpressed floccose (lens) later more glabrous, normally with distinct sulcate zones and with numerous characteristic radial cracks, margin sharp to slightly rounded, often with a few narrow sulcate zones in different shades of ochraceous to brown. PORE SURFACE ochraceous, buff to wood colour, when fresh with a tint of pinkish, pores small, entire, round, 6
8 per mm, tubes concolorous with pore surface distinctly stratified, old tubes frequently stuffed with white mycelium, each stratum up to 3 mm deep, tubes up to a total of 2 cm deep.

CONTEXT ochraceous, buff, isabelline to pale brownish-pink, darker than the pore surface, up to 1.5 cm thick, woody hard, in section with a distinct black crust in old specimens.

HYPHAL SYSTEM trimitic, generative hyphae thin-walled, 2-4 µm wide and with clamps, skeletal hyphae dominating, 2-6 µm wide, thick-walled to solid, hyaline to pale yellowish, binding hyphae moderately branched, solid, 2-5 µm wide. Cystidia not observed, but reported by Bose (1971:34) to be clavate and finely encrusted. Spores oblong elliptical, 6-7 × 1.5-2 µm (acc. to Cunningham 1965:244). Lowe (1957:70) reports them to be 4.5-6 × 2-2.5 µm.

HABITAT. On deciduous wood. DISTRIBUTION. Widespread in Asia from Pakistan to the Philippines and south to Australia. Also reported from tropical America, not seen in Africa.

REMARKS. The species is usually easy to recognize because of the greyish to black pileus with numerous radial cracks and the pinkish to buff pore surface with small pores.

Literature :
Bakshi, B.K.; Sen, M.; Singh, B. 1970. Cultural diagnosis of Indian Polyporaceae. 2. Genera Fomes and Trametes. Indian Forest Records. 2(10):245-276

Page number : 253
Description type : Culture description
Description : Fomes dochmius (Berk. & Br.) Cooke (Pl. I & Pl. VII, 8)
Key Pattern: 1 1 2 1 8 1 2 2 4 2 2

GROWTH CHARACTERS.-Growth very slow, 1 cm in 1 week. Advancing zone white, even, appressed. Mat white, with slight tinge of mustard yellow in some areas, cottony to cottony-woolly becoming subfelty and felty. Silky mycelia in radiating zones develop within two weeks. Reverse unchanged. Odour none.
Tests for extracellular oxidase negative; on gallic and tannic acid agars diffusion zones nil, growth 1.5 cm on former and 1.0 cm on latter; guaiacum reaction nil.

HYPHAL CHARACTERS.-Advancing zone: hyphae hyaline, thin to slightly thickwalled, branched with frequent clamp connections, 1.5-3.8 ? diameter. Aerial mycelium (a) as in advancing zone; (b) chlamydospores hyaline, thin to slightly thick-walled, terminal or intercalary, 15.4-20.2 × 7.7-10.7 ?. Submerged mycelium: hyphae as in aerial mycelium.

CULTURES EXAMINED: FRI 52 & FRI 624: Context cultures, isolated from 4154, 4247 & 7488 on logs and stumps of Mesua ferrea Linn., causing brown cuboidal rot.
Predominantly white felty mat, very slow growth, presence of chlamydospores and absence of oxidase reaction distinguish F. dochmius in culture.

Literature :
Berkeley, M.J.; Broome, C.E. 1874. Enumeration of the fungi of Ceylon. Part II. Botanical Journal of the Linnean Society. 14:29-141

Page number : 50
Description type : Latin diagnosis
Description : 469. Polyporus (Placodermei) dochmius, B. & Br.
Pileo dimidiato obliquo duro glabrescente zonato fasciato radiato-rugoso lineatoque, margine tomentoso; contextu pallido; hymenio ochroleuco, poris punctiformibus.
On dead wood.
Pileus 3.5-4 inches across, 2.5 long, oblique, repeatedly zoned with brown and umber, marked with radiating elevations and raised lines towards the margin; edge fawn-coloured, tomentose.
Allied to P. ferreus.

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