Phylum:Basidiomycota >> Class: Basidiomycetes >>  Order: Phallales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Hyphodontia cf. rimosissima

Hyphodontia cf. rimosissima (Peck) Gilb.

Basionym: Odontia rimosissima Peck, N.Y. State Mus. Rep. 50: 114. 1897.

 Description: Basidiocarp effuse, adnate, loose membranaceous when young, subceraceous and brittle when old, 50-120 μm thick in section (aculei excluded). Hymenial surface Light Buff or Pale Olive-Buff, grandinioid-odontioid, cracked extensively when old; margin paler, rather determinate, or consisting of an arachnoid-pruinose thinning zone. Aculei rather crowded, sometimes fused, 10-13 per mm, conical or subulate, apically ± fimbriate, 50-120 × 30-100 μm. Hyphal system monomitic; hyphae nodose-septate. Subiculum uniform, composed of medullary layer, with rather loose texture when young, rather dense when old; hyphae ± vertical, richly ramified, somewhat interwoven, colorless, distinct, 2-4 μm diam., with 0.4-0.8 μm thick walls. Hymenium with rather compact texture. Trama with compact texture, hyphae vertical, yellowish. Hymenium and subhymenium IKI brownish, CB+. Granular crystals common in aculei. Cystidioles numerous, usually apically encrusted, cylindrical or slightly capitate, 10.5-25 × 4-5.5 μm, thin-walled. Subicular cystidial elements variably abundant, not encrusted, capitate, 12-22 × 4-6 μm, thin- or slightly thick-walled. Basidia suburniform or utriform, 14-20 × 3.5-4.8 μm, 4-sterigmate. Basidiospores broadly ellipsoid, smooth, thin-walled, mostly with one oil-drop, (4.7-) 5-5.7 (-6) × 3.2-3.9 (-4.2) μm, IKI-, slightly CB+.

Taiwan. Taipei: Sanhsia, alt. 320 m, on bark of angiosperm, 9 Sep 1988, Wu 880909-55 (H, TNM). Hsinchu: Chienshih Hsiang, Neiwan, alt. 315 m, on branch of angiosperm, 19 Aug 1988, Wu 880819-26 (H, TNM). Miaoli: Kuansi Primeval Forest Park, alt. 1,000 m, on branch of Itea oldhamii, 5 Apr. 1988, Wu 880405-20 (H, TNM). Nan-tou: Luku Hsiang, Sunlinksea, alt. 1,600 m, on fallen twig, 24 Mar 1988, Wu 880324-7 (H, TNM). Leinhuachih, alt. 700 m, on fallen twig of angiosperm, 1 May 1988, Wu 880501-25 (H, TNM)..

 Habitat: null



Wu, SH. 1990.


S. H. Wu

 Note: Hallenberg (1984) considered H. verruculosa a later synonym of H. rimosissima. After studying the types of both species, I am of the same opinion; in addition, when I examined the holotype of O. ochracea, I found that it represents the same species. The Tai-wanese collections are fairly similar to the above-mentioned specimens in the microscopic characters. Macroscopically H. rimosissima has larger aculei, thought they sometimes vary in size and density, numbering 5-9 per mm; the Taiwanese collections have a paler color on the hymenial surfaces, and generally smaller and denser aculei, which number 10-13 per mm. Therefore, the exact specific identification of the Taiwanese specimens still requires study.