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Inonotus nothofagi G. Cunn. 1948

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Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. 1948

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Endemic
Present
New Zealand
Political Region

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G. Cunn.
G. Cunn.
1948
1
ICN
Inonotus nothofagi G. Cunn. 1948
NZ holotype
species
Inonotus nothofagi
Nothofagus solandri, [New Zealand], Wellington. Day's Bay, 650 feet, Aug., 1947, G. B. Rawlings, type PDD 5795.

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Inonotus nothofagi G. Cunn. 1948

Accepted as Inonotus nothofagi.
As stated by Cunningham (1965), this species is related to I. radiatus (Sow.: Fr.) P. Karst. of the Northern Hemisphere, but is easily separated by the coloured spores and straight setae. It is confined to Nothofagus. Cunningham (1965) included collections on Quercus from India under I. nothofagi but these were later redetermined as I. diverticulosepta Pegler (Pegler, 1967).
Holotype: PDD 5795 - New Zealand, Wellington, Days Bay, Aug. 1947, G.B. Rawlings, on Nothofagus solandri (Hook. f.) Oerst.

Inonotus nothofagi G. Cunn. 1948

Nothofagus cliffortioides (Hook.f.) Oerst. Auckland. Pangarara River, Mt. Tongariro, 3,500 feet, Dec. 1946. G.H.C. Otago. Ben Lomond, Queenstown, 1,500 feet, Dec. 1919, G.H.C.; Greenstone River, Feb. 1948, Joan Dingley; Lake Manapouri, Feb. 1948, Joan Dingley. Nothofagus fusca (Hook.f.) Oerst. Wellington. York Bay, 350 feet, June 1922, E.H.Atkinson. Otago. Sylvan Lake, Routeburn Valley, 1,400 feet, Jan. 1942, G.H.C.; Greenstone River, Feb. 1948, Joan Dingley. Nothofagus menziesii (Hook.f.) Oerst. Canterbury. Governor's Bush, Hermitage, Feb. 1948, Joan Dingley. Otago. Milford Track, Feb. 1948, Joan Dingley. Nothofagus solandri (Hook.f.) Oerst. Wellington. Day's Bay, 650 feet, Aug. 1947, G.B.Rawlings, type collection. Canterbury. Oxford Forest, Feb. 1881, T.Kirk.
Hymenophore annual, sessile, dimidiate, firm and woody but brittle. Pileus applanate, when attached by a broad base, more often effused-reflexed, or conchate when attached by a narrow base, sometimes resupinate, 1.5-3.5 cm. x 1.5-3 cm. x 2-4 mm.; surface ferruginous, umber, or black, lighter in colour peripherally, radiately striate, concentrically sulcate, smooth and polished save at margins where somewhat tomentose, cuticle 25-100 µ thick, of densely arranged parallel hyphae cemented with mucilage, walls chestnut-brown, in old plants thin, black and shining; margin at first tan or bay-brown, acute, inturned, lobed, torn, in old specimens often abrupt and concolorous; hymenial surface ferruginous, becoming umber, even, fertile to the edge, dissepiments toothed. Context 0.2-2 mm. thick, at first fulvous, becoming ferruginous, of densely packed parallel brown hyphae; generative hyphae ribbon-like, 5-7 µ thick, wall 0.5 µ, scantily septate save in the hymenium, sparsely branched. Pores irregular, angular or linear, to 2.5 mm. deep, ferruginous in section, 100-400 µ diameter, or 2-5 per mm.; dissepiments 50-150 µ thick, most 75 µ, equal, apex sometimes tapering, finely tomentose. Setae ventricose, chestnut-brown, 20-26 x 10-12 µ, abundant. Basidia oblong, 6-8 x 2.5-4 µ, soon collapsing. Spores broadly elliptical 5-6 x 3-3.5 µ, smooth, ferruginous, abundant.
DISTRIBUTION: New Zealand.
HABITAT: Growing imbricate on bark or decorticated wood of standing trees, associated with a white rot.
Hymenophorum annum, sessile, dimidiatum; pileus applanatus vel effuso-reflexus, 1.5-3.5 cm. x 1.5-3 cm. x 2-4 mm.; superficies ferruginea, umbrina, vel nigra, radiato-striata, concentricaliter sulcata, levis politaque, cuticula 25-100 µ crassa, nigra, nitens, fragilis; superficies hymenialis ferruginea, demum umbrina, aqua, dissepimenta dentata. Contextus 0.2-2 cm. crassus, fulvus, demum ferrugineus; hyphae generativae 5-7 µ crassae, sparse septatae, sparsae brachiatae. Pori angulati vel lineares, ferruginei, 2-5 per mm.; setaa ventricosae, castaneae, 20-26 x 10-12 µ. Sporae late ellipticae, 5-6 x 3-3.5 µ, leves, ferrugineae.

In a former paper (Trans. N.Z. Inst., vol. 58, p. 241, 1927) I listed the species under Polyporus radiatus (Sow.) Fr. since collections forwarded to the late C.G.Lloyd and J.R.Weir were so named by them, despite the coloured spores. Since then many additional collections have come to hand; and as in all spores are definitely brown, it is evident that this feature is constant for the species. I have also been able to compare our collections with I. radiatus, I. cuticularis, I. rheades and I. ludovicianus. All possess a monomitic hyphal system, long ribbon-like thin-walled brown generative hyphae (which are without clamp connections), honeycomb basidial type and brown acuminate setae. Specimens of I. radiatus from England (Birmingham, collected by W.B.Grove, forwarded by E.M.Wakefield) and Sweden (Vaidsatra, collected by Seth Lundell, forwarded by J.Ax.Nannfeldt) differ from the New Zealand species in that the poorly developed cuticle is concolorous with the context, spores are hyaline, setae are scanty--a half dozen at most being seen in the field of the microscope in contrast with the scores seen in New Zealand collections. I. cuticularis (from Fagus sp., Kew Gardens, collected by E.M.Wakefield) is readily identified by the unusual cuticle, which is composed of a dense tomentnm of chestnut-brown dendroid compound setae, branches of which are hamate. Spores are brown and 5-7 x 4-5 µ. I. rheades (from Quercus spp., West Okoboji and Iowa City, U.S.A., forwarded by G.W.Martin) possesses a striaose surface and is without a cuticle; spores, though brown, are larger than those of our species (5-8 x 4.5-6 µ). I. ludovicianus (from Wauchope, New South Wales, forwarded by J.B.Cleland) was held by the late C.G.Lloyd to be a thin form of I. cuticularis. It differs from this last in being without a definite cuticle. It differs also from I. nothofagi in this feature, in larger pilei, different colour of context and pores, and differently shaped spores.

The New Zealand species would therefore appear to be undescribed. It is apparently confined to species of Nothofagus and may be recognised by the small dark pileus with (when old) almost black surface and abrupt margin, definite shining black cuticle, pores 2-5 per mm., ferruginous broadly elliptical spores and abundant ventricose setae.

Nothofagus solandri (Hook.f.) Oerst. Wellington. Day's Bay, 650 feet, Aug. 1947, G.B.Rawlings, type collection.

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Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Inonotus nothofagi G. Cunn. 1948
Inonotus nothofagi G. Cunn. (1948)
Polyporus radians Lloyd (1923)
Inonotus nothofagi G. Cunn. 1948
Polyporus radiatus sensu G. Cunn. (1927)
Inonotus nothofagi G. Cunn. 1948

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Inonotus nothofagi G. Cunn. 1948
[Not available]

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typification
Nothofagus solandri, [New Zealand], Wellington. Day's Bay, 650 feet, Aug., 1947, G. B. Rawlings, type PDD 5795.

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1cb18f44-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 March 1996
31 October 2023
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