Phylum:Basidiomycota >> Class: Basidiomycetes >>  Order: Russulales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Gloeocystidiellum luridum var. microsporum

Gloeocystidiellum luridum (Bres.) Boidin var. microsporum Chen et Lin, Taiwania 35: 73. 1990.

 Description: Macroscopic characters: Basidiocarps resupinate, longitudinally effused, adnate, 60–110 μm thick, 0.8–1.5 × 18 cm, very thin to translucent, membraneous, even, not cracked, grayish white, whitish marguerite yellow, sea-foam yellow to pale turtle green, bleached and becoming completely transparent in 5% KOH; margins thining out, pruinose, white. Microscopic characters: Basal layer of context obvious, up to 60 μm thick, composed of densely compact parallel hyphae, transparent; intermediate layer of context indistinct or absent, almost occupied by gloeocystidia; hyphae 1.5–2 μm thick, gelatinized, thin-walled, with clamp connections, smooth; gloeocystidia crowded in intermediate layer and hymenial layer, forming a dense palisade, arising from the thick basal layer, slightly flexuous, cylindrical, scarcely or not projecting, rounded at apex, sometimes septate at base, 2.5–5 × 10–35 μm; hymenial layer 20–30 μm thick, indistinct; basidia 4–5 × 10–20 μm, cylindrical, slightly flexuous, with 2–4 basidiospores; sterigmata straight, 4–5 μm long; basidiospores faintly blue in Melzer's reagent, ellipsoid, more or less depressed on one side, 3–3.5 × 5–6 μm; thin-walled, smooth, apiculate, 1-guttulate, amyloid.

Taipei Hsien, Wulai Hsiang, from Orchid Valley to Mt. Suchuanio, on the road side, under the hardwood forests, alt. 400–500 m, Dec. 7, 1975, S.-H. Lin (Holotype: NTU-3598).

 Habitat: On dead branches of broad-leaved trees, associated with white rot.



Lin, SH. and Chen, ZC. 1990.


S. H. Lin

 Note: The appearance, size and color of the fruit bodies and the character of the basidiospores of this species are very similar to those of Corticium boninense S. Ito et Imaz. from Bonin Island, but the latter species lacks the ancillary organs in context. This species is also very closely allied to Gloeocystidiellum lactescens (Berk.) Boidin in many aspects, except for the latter having larger spores, broader gloeocystidia, thicker fructifications and without clamp connections. It is uncertain whether the gloeocystidia of this species are radicate or not, however, on the basis of the presence of septa at the thin-walled base of the gloeocystidia, it might be reasonable to say that the gloeocystidium is generating from the terminal end of a lateral branch of basal hypha or directly from the basal hypha. In general, this taxon is identical to Gloeocystidiellum luridum in many aspects except the thin basidiocarp and the smaller basidiospores. Consequently, Lin and Chen (1990) treated the population from Taiwan as a variety of G. luridum.