Rosellinia evansii Laessøe & Spooner.
This taxon is distinctive in being erumpent through bark, with host and fungal
tissue arranged in a stellate pattern around each stroma, and ascospores with
a spiralling germ slit (Laessøe & Spooner, 1994). Although the former feature
rather suggests Astrocystis Berk. & Br., a genus they consider different
from Rosellinia, the authors placed this taxon in Rosellinia relying
on the Dematophora-like anamorph found associated with
the type collection. According to Rappaz (1995), R. evansii could be
conspecific with R. americana (Petrak) Rappaz, so far
known from the type collection in USA. The latter is said to lack the stellate
Rosellinia evansii is likewise distinctive in its distribution, as
it is known from North America, Australia and Great Britain. The British specimen
was collected on Betula. Rosellinia evansii is yet unknown from
continental Europe and is likely to be very rare.