Sydow Germany, Lengerich, leg. Basidiocarp of voucher GEL 2160 on an old Polypore. Basidiocarp hypochnoid, white to cream-coloured, later yellowish to ochraceous. 5 m long, basal ca. 1 m broad.
Clamps exist constantly on all septa, no polifications of clamps.
Ascendent subhymenial and hymenial hyphae 5-8 m in diameter, hyaline. For the whole species complex around B. subcoronatum it is possible to assume a cosmopolitan distribution with a big spectrum of subtrates. The species occures as well on gymnosperms and angiosperms wood as on dead basidiocarps, mainly of Polyporaceae. Remarks B. subcoronatum, the type species of Botryobasidium, could be understood as a complex of species or a sibling complex. This complex is delimited from other species of Botryobasidium by the characters of suburniforme basidia, navicular basidiospores, clamps constantly on all septa and also the lack of cystidia, chlamydospores and a Haplotrichum anamorph.