New Zealand Journal of Botany abstracts
Torrendiella (Ascomycota, Helotiales) on Nothofagus
PETER R. JOHNSTON
Herbarium PDD
Landcare Research
Private Bag 92170
Auckland, New Zealand
IRMA J. GAMUNDÍ
CONICET
Universidad Nacional del Comahue
Quintral 1250
8400 San Carlos de Bariloche
Río Negro, Argentina
Abstract Six species of
Torrendiella are described and
illustrated from
Nothofagus, and a key is provided for their
identification.
T. madsenii occurs on wood in Australia, New Zealand,
and southern South America, and although its host range is uncertain, may it be
confined to
Nothofagus. The other five species form fruiting bodies on
fallen leaves, are restricted to
Nothofagus, and all are described here
as new. Two of these species occur only in southern South America,
T.
andina (on
N. betuloides and
N. dombeyi) and
T. grisea
(on
N. dombeyi). Three species occur only in New Zealand,
T.
brevisetosa (on
N. menziesii),
T. cannibalensis (on
N.
menziesii), and
T. dingleyae (on
N. fusca,
N.
menziesii,
N. solandri var.
cliffortioides, and
N.
truncata). The occurrence of an additional species on
N.
cunninghamii from Australia is noted, but it is not formally described
because of lack of good material.
Torrendiella is accepted as a member
of the Sclerotiniaceae, distinct from
Zoellneria. It is characterised by
the possession of excipular setae and a three-layered ectal excipulum, the
central layer of which is gelatinous. The complex excipular structure and the
presence of gelatinous tissue suggests a relationship with
Rutstroemia.
T. eucalypti (Berk.) Spooner is interpreted in a restricted sense as an
Acacia-specialised species.
Keywords fungi; Argentina; Australia; New Zealand;
Nothofagus; Helotiales; Sclerotiniaceae; Torrendiella;
Zoellneria
B99057
Received 26 November 1999; accepted 6 April 2000
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