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Hydnum crocidens Cooke 1890

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Hydnum crocidens Cooke, Grevillea 19 45 (1890)
Hydnum crocidens Cooke 1890

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Indigenous
Present
New Zealand
Political Region

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Cooke
Cooke
1890
45
ICN
Hydnum crocidens Cooke 1890
Australia
species
Hydnum crocidens

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crocidens

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Hydnum crocidens Cooke 1890

Under (1) Leptospermum ericoides, Auckland: Titirangi, Atkinson Park. 10.ix.l965, R.F.R. McN., 24707; 14.vi.l967, R.F.R. McN., 25916: 6.vii.l967, R.F.R. McN., 25946; Henderson Valley, Sharp's Bush, 21.vi.l967, R.F.R. McN., 25914; (2) L. scoparium. Auckland: Woodhill State Forest, vi.l966, R.F.R. McN., 25277; 15.vi.l966, R.F.R. McN., 25250; (3) Leptospermum sp., Auckland: Little Barrier Island, X.1945, J. M. Dingley, 20105; Waitakere Ranges, off Anawhata Rd., viii.l947, J. M. D. 5586; (4) unknown native plants, Auckland: Purewa Bush, 1931, M. Hodgkins, 16752; Titirangi, ix.l931, M. Hodgkins, 7341; Waitakere Ranges, Cuttygrass Track, ix.l944, J. M. D., 4457; Little Barrier Island, X.1945, J. M. D., 4456; Waitakere Ranges, off Anawhata Rd. viii.l948, J. M. D., 7378; iv.l949, P. M. Ambler, 7379; Swanson, University Reserve, ix. 1952, S.D. Baker, 17722; Piha Valley, viii.l953, J. M. D., 17720: Otago: Ross Creek Reservoir, vii.l933, H. K. Dalrympic, 6386.
Fructifications fleshy, stiptate and pileate. Pileus 1-4 cm diam., dry, applanate and slightly centrally depressed, finely felted when young, centrally glabrous with felted margins at maturity, white, pallid creamy white, or pallid cream, occasionally with faint shell pink tints, stained with ochraceous or rusty brown patches when overmature, drying pallid yellow, yellow-brown, orange-brown, or sometimes dark reddish brown: margins involute when young, thin, entire, often undulate. Hymenial surface ± concolorous with pileus, drying orange-brown, sterile margin absent, spines non-decurrent but reaching stipe, to 4 mm long, crowded, subulate, pallid creamy white, often with faint shell pink tints. Stipe central, occasionally excentric or lateral, 1.3-3 cm long, ± equal, 2-4 mm diam., solid, finely felted, concolorous with pileus, drying same colours as pileus; flesh concolorous with exterior. Context fleshy, to 1 mm thick, pallid creamy white, azonate, monomitic. Hyphae thin-walled, inflating, 4-12.5µm diam., readily collapsing, clamp connections present; superficial hyphae in young fructifications similar but of smaller and more even diam., typically aggregated into tufts, 3-6 µm diam. Basidia irregularly subclavate, 35-52 x 5.5-8.5 µm, 4-(5)-spored, sterigmata to 5 µm long; cystidia absent. Spores globose, subglobose, or occasionally broadly elliptical, hyaline, thin-walled, readily collapsing, 6.8-8.2-(9) x 6-7.5 µm, smooth.
TYPE LOCALITY: Port Phillip, Victoria, Australia.
Solitary or gregarious under native trees and shrubs
Cunningham, Trans. R. Soc. N.Z. 85: 589, fig. 1. la. 1958.

Maas Geesteranus (1964) considered Hydnum crocidens inseparable from the H. repandum complex, but because of its extreme variability in habit, was unable to decide on its status within that complex. On the basis of the specimens examined, I am reluctant to reduce the species to synonymy under H. repandum. Although it is an extremely variable species as found in New Zealand, three well defined forms worthy of variental rank can be distinguished. In microscopical characters, the above description of the type variety agrees closely with that of Maas Geesteranus (1964), except that in mature frutifications, spores are primarily subglobose to globose and are only occasionally broadly elliptical. Maas Geesteranus considered that globose spores were immature even though they were in the majority. However, in ephemeral characters such as colour of pileus and spines, and texture of pileus surface, the present description differs from those of both Cunningham (1958) and Maas Geesteranus.

Hydnum crocidens var. crocidens may be distinguished by the pallid, predominantly centrally stipitate fructifications, and the non-decurrent spines. It favours habitats where Leptospermum is present.

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Hydnum crocidens Cooke 1890
Hydnum crocidens Cooke (1890)
Hydnum crocidens Cooke 1890
Hydnum crocidens Cooke (1890)
Hydnum crocidens Cooke 1890
Hydnum crocidens Cooke (1890)
Hydnum crocidens Cooke 1890
Hydnum crocidens Cooke (1890)
Hydnum crocidens Cooke 1890 var. crocidens

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Hydnum crocidens Cooke 1890
New Zealand
Auckland
Hydnum crocidens Cooke 1890
New Zealand
Bay of Plenty
Hydnum crocidens Cooke 1890
New Zealand
Buller
Hydnum crocidens Cooke 1890
New Zealand
Coromandel
Hydnum crocidens Cooke 1890
New Zealand
Dunedin
Hydnum crocidens Cooke 1890
New Zealand
Nelson
Hydnum crocidens Cooke 1890
New Zealand
Northland
Hydnum crocidens Cooke 1890
New Zealand
Taupo

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taxonomic status
For Geesteranus H. ambustus from Victoria, Australia provides an earlier name, but is perhaps best considered a nom. ambig. or at least a different species. ICAF considers all vars to be synonyms of H. repandum. Current morphological and sequence data suggest otherwise. NZ material as H. crocidens sensu stricto or var. wellingtonensis is unrelated to Au H. crocidens and require new names [JAC]

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1cb18d97-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
6 July 1998
27 October 2005
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