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 Ripartites helomorphus
SynonymsAgaricus helomorphus
BiostatusPresent in region - Origin uncertain
Images (click to enlarge)
Caption: cap hyphae
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Caption: basidium and spores
Owner: J.A. Cooper |
Article: Horak, E. (1980) [1979]. Paxilloid Agaricales in Australasia. Sydowia 32: 154-166.
Description: Pileus —20 mm, convex at first soon umbonate-expanded, papillate centre sometimes depressed, margin inrolled in young specimens later becoming incurved and conspicuously notched, margin not striate; whitish to pale argillaceous; dry, smooth to appressedly fibrillose veil remnants absent. Lamellae 1-16 (-3) moderately crowded broadly adnate to subdecurrent, up to 3 mm wide; argillaceous to cinnamon; edge concolorous, even. Stipe –30 x -2.5 mm, cylindric to subclavate, central; at apex concolorous with pileus, reddish brown towards base, basal tomentum absent; glabrous or minutely fibrillose, dry, fistulose, shingle in groups. Context whitish. Odour and taste not distinctive. Chemical reactions on pileus: KOH negative. Spore print pale brown.
Spores 4 - 5.5x3.5 (-4) µm, subglobose to ovoid, pale brown, densely covered with hemispheric warts or short cylindric projections, membrane thin-walled, inamyloid. Basidia 30 - 35x 6 - 7 µm, 4-spored. Cystidia absent. Cuticle a cutis of cylindric hyphae (3 - 6 µ diam.), membranes not gelatinised, encrusted with brown (KOH) pigment. Clamp connections present.
Habitat: On soil among moss under Nothofagus solandri var. cliffortioides and N. menziesii.—New Zealand.
Notes: This species was well described by Métrod (1946: 74) and Huijsman (1960: 335), and the New Zealand collection agrees in all taxonomically important details with European specimens.
The following description is taken from fresh carpophores collected in New Zealand:
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