Search on : Taxa descriptions

 


   
Literature:
 
Page number:157 
Remarks (internal):The species is separated from the other ones in the genus by its thick, woody hard basidiocarps, the greyish to pale brownish pore surface, the gloeocystidia and the heavily encrusted skeletal cystidia. Macroscopically it reminds one of Rigidoporus vinctus, but this species has simple septate generative hyphae and non-amyloid spores.  
Description type:Non-original description 
Description:Wrightoporia tropicalis (Cooke) Ryvarden, Prelim. polypore flora East Afr.; 619, 1980. - Fomes tropicalis Cooke, Grevillea 15: 22.1886.
Basidiocarp perennial, resupinate to effused reflexed, becoming widely effused, up to 15 cm in diameter and 2.5 cm thick, consistency woody, hard and dense when dry, pileus fragmentary or absent, appearing as a black upper portion of the pore surface especially on vertical substrata, glabrous, dull or slightly shining, smooth or weakly sulcate, the pilear surface is darker brown towards the pore surface, but there is no distinct margin, only a thin white line towards the sterile margin round the pore surface, pore surface pale grey or brown with a whitish tint, pores circular to slightly elongated in radial direction, 6-7 per mm, dissepiments thin and entire, tubes distinctly stratified, totally up to 2.5 cm long, each stratum up to 1.5 mm long, colour grey to brownish near the pore surface, but in thick specimens more fulvous, rusty red to bay in the older parts, context fragmentary or lacking, light rusty brown. Hyphal system trimitic, generative hyphae with simple septa, hyaline and thin-walled, 1.2-3 µm wide, soon collapsing and then very difficult to septa, skeletal hyphae dominant, thick-walled to solid, yellow to pale brown, weakly to heavily dextrinoid in Melzer's reagent, 3-4 µm in diameter, sometimes a few skeletal hyphae become strongly swollen at the apex, simulating clavate cystidia, with a diameter up to 10 µm. they occur infrequently and have only been seen deeply embedded in the trama. Cystidia present as apical heavily encrusted ends of skeletal hyphae, crystal masses up to 20 µm in diameter and obscuring the apical end of the skeletal hyphae. Gloeocystidia present, thin-walled to slightly thick-walled with granular to oily contents appearing refractive in phase contrast, 5-17 µm in diameter, up to 150 µm long, mostly embedded in the trama but also curving into the hymenium but not projecting beyond it. In dried specimens they are partly collapsed and difficult to tease apart. Basidiospores subglobose to broadly ellipsoid, hyaline, smooth to slightly verrucose (seen under SEM), thin-walled, 3-4 x 2-3 µm, weakly to strongly amyloid.
Substrata: On deciduous wood.
Distribution: Neotropical species from Puerto Rico and Guadeloupe to Brazil.
 
Taxon name: