Phylum:Basidiomycota >> Class: Basidiomycetes >>  Order: Polyporales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Hyphoderma clavatum

Hyphoderma clavatum Sheng H. Wu, Bot. Bull. Acad. Sin. 38: 64. 1997..

 Description: Basidiocarp resupinate, effuse, adnate, 70-150 μm thick in section, membranaceous. Hymenial surface grayish clay in color, with numerous tiny brownish dots under the lens, smooth or slightly tuberculate, occasionally cracked; margin thinning, concolorous, slightly byssoid. Hyphal system monomitic; hyphae nodose-septate. Subiculum composed of basal layer and medullary layer. Basal layer fairly thin, with dense texture, with horizontal hyphae. Medullary layer with fairly loose texture, with variously oriented hyphae. Subicular hyphae colorless, 2-3.5 μm diam., thin-walled. Hymenial layer with fairly dense texture; hyphae mainly vertical, colorless. Cystidia usually immersed, clavate or apically globose, colorless, 30-60 μm long, 10-15 μm diam for the globose parts, thin-walled or apically slightly thick-walled, sometimes apically covered with brownish yellow resinous material. Basidia utriform, 30-40 × 6.5-8 μm, 4-sterigmate. Basidiospores cylindrical, adaxially slightly concave, smooth, thin-walled, usually guttulate, 10-13 × 4.2-5.2 μm (holotype spore-print: X = 11.11 ± 0.83 × 4.86 ± 0.25 μm, n = 30), IKI-, CB-.

Taiwan. Miaoli: Takeshan, alt. 550 m, on branch of Euphorbia pulcherrima, 25 Mar 1994, Wu 9403-4 (holotype, TNM).

 Habitat: null



Wu, SH. 1997.


S. H. Wu

 Note: Hyphoderma clavatum is allied to H. clavigerum (Bres.) Donk by the clavate cystidia and the brownish resinous material on apical cystidia, but differs from the latter in having longer basidiospores. This species also resembles H. subclavigerum K.H. Larss. & Hjortstam in having clavate cystidia and similar-sized basidiospores, but is distinct from the latter by lacking projecting cylindrical cystidia.