New Zealand Journal of Botany abstracts

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Hispidula gen. nov. (Helotiales, Hyaloscyphaceae) in Australia and New Zealand

Peter R. Johnston

Herbarium PDD
Landcare Research
Private Bag 92170
Auckland, New Zealand

Abstract  Five species are described in the new discomycete genus Hispidula. The genus is characterised by very long excipular hairs (the walls of which are dextrinoid in Melzer’s reagent) aggregated into large, tapering, tooth-like appendages, and a two-layered ectal excipulum. The outer layer of the ectal excipulum is confined to the lower half of the receptacle and comprises angular to brick-shaped cells with thickened, gelatinous walls, in rows at a high angle to the surface of the receptacle. The inner layer extends to the edge of the disc, and its cylindric to long-cylindric cells also have thickened, gelatinous walls. The presence of dextrinoid excipular hairs suggests a relationship with genera such as Hyalopeziza and Unguicularia. The genus is known only from Australia and New Zealand, three species from Dracophyllum (Epacridaceae), one from tree ferns (described previously as Cyathicula dicksoniae), and one from Acmena (Myrtaceae).

Keywords  fungi; discomycete; New Zealand; Australia; Hispidula; Cyathicula; Echinula; Hyaloscyphaceae; Helotiales

B02045; Received 14 June 2002; accepted 2 May 2003; online publication date 26 November 2003
New Zealand Journal of Botany, 2003, Vol. 41: 685-697
0028-825X/03/4104-0697 $7.00 © The Royal Society of New Zealand 2003

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