Search on : Taxa descriptions


Page number:536 
Remarks (internal):The simple septate hyphal and the asperulate amyloid spores make the genus easy to recognize microscopically. 
Description type:Non-original description 
Description:RIGIDOPOROPSIS AMYLOSPORA Johan. & Ryv. op.cit.
Fruitbody annual, resupinate, widely effused, up to 6 mm thick, adnate, sterile margin entire and several mm broad. Consistency brittle to resinous hard when dry. Pore layer first cream to pall fulvous, discolouring dirty yellow with brown patches when dried and handled, reddish-brown resinous matter secreted especially along the margin. Pores circular, 4-6 per mm, dissepiments entire and rather thin. Tubes single-layered, up to 5 mm long, nearly concolorous with the pore surface. Context almost absent or up to 1 mm thick, concolorous with the tubes or paler.
Hyphal system mono to semidimitic, generative hyphae in sub-hymenium hyaline to pale yellow, thin to weakly thickwalled, moderately branched with simple septa, 3-6 µm in diameter, but also more thick-walled and more yellow with very few septa and easily mistaken for skeletal hyphal if the very few septa are overlooked, up to 10 µm wide. Hyphae in the context and the sterile margin hyaline to golden, thick-walled, mosty unbranched with uneven thickness, usually 4-6 µm wide, rarely swollen to 10 µm (in KOH). These hyphae have only a very few simple septa and they are probably sklerified generative hyphae rather than true skeletal hyphae. Cystidia none. Spores broadly ellipsoid, hyaline, finely asperulate and amyloid, weakly to strongly blueviolet in Melzer's reagent, 4-5 x 2.5-3 µm. Basidia pedicellate with a distinctly inflated upper region, 22-50 µm long with four sterigmata.
HABITAT. On deciduous wood and on Bambusa.
DISTRIBUTION. Known only from Africa and specimens have been examined from Malawi and Ghana.
Taxon name: