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Polyporus rosularis G. Cunn. 1948

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G. Cunn.
G. Cunn.
1948
36
ICN
Polyporus rosularis G. Cunn. 1948
species
Polyporus rosularis
Type New Zealand PDD 3914

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rosularis

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Polyporus rosularis G. Cunn. 1948

Nothofagus sp. Nelson. Mt. Arthur Tableland, 3,500 feet, Feb. 1928, G.H.C.

Hawkes Bay. Waikare-iti Track, Lake Waikaraemoana, Jan. 1933, J.G.Gibbs, type collection.

Hymenophore annual, hard and horny though brittle, compound, rosulate, of numerous (5-15) pilei united by a broad stem-like base to a common stroma. Pilei simple or branched, digitate, spathulate, or urceolate, to 3 cm. x 3 cm. x 1-5 mm., attached by a broad base about the width of the pileus; surface cream, becoming pallid ochre, irregular, radiately sulcate, finely tomentose, cuticle to 100 µ thick, composed of densely woven hyphae arranged in a palisade embedded in mucilage; margin reddish-brown, or concolorous, thin and horny, translucent, much lobed or crenate, acute or bluntly rounded; hymenial surface decurrent, cream or pallid ochre, darker peripherally, with or without a narrow sterile margin, dissepiments not toothed. Context straw colour, 1-2 mm. thick, of radiately arranged hyphae, firm but brittle; generative hyphae 6-8 µ thick, wall l µ, ribbon-like, lumen staining, sparsely branched, septate, with large clamp connections. Pores straw colour in section, 1-1.5 mm. deep, 150-200 µ diameter, or 4-5 per mm.; dissepiments 50-200 µ thick, equal, of woven mainly parallel hyphae, apex equal, finely velutinate. Basidial type clavate, basidia clavate, 14-16 x 5-7 µ, persistent. Spores broadly obovate, 4-5 x 3.5-4 µ, smooth, hyaline.
New Zealand.

Growing upon rotting logs or stumps.

Hymenophorium annum, rosulatum, pileorum 5-15 compositum e basi commune emergentium. Pilei digitati, spatulati vel urceolati, ad 3 cm. x 3 cm. x 1-5 mm.; superficies cremea, demum pallide ochrea, subtiliter tomentosa, radiatim sulcata; cuticula 100 µ crassa, ex hyphis pallum densum formantibus compositis, textu gelatinoso cinctis; superficies hymenialis decurens, creamea vel pallide ochrea. Contextus stramineus, hypharum systema monomitica; hyphae genitales longae, sparse brachiatae, libere septatae, hyphis fibulatis; ducti lacticiferi absentes. Pori irregulares, 150-200 µ diam., vel 4-5 per mm.; dissepimenta 50-200 µ. Typus basidialis clavatus. Sporae late obovatae, 4-5 x 3.5-4 µ, leves, hyalinae.

Hab.: Nothofagus sp. Hawkes Bay, Lake Waikaraemoana, Jan. 1933, J.G.Gibbs, specimen typicum.

Separated from P. anthracophilus and P. rosulatus by the palisade cuticle of the pileus, smaller pores and differently shaped spores. The hymenophore is hard and horny, almost cartilaginous, and pilei are firmly cemented together.

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Polyporus rosularis G. Cunn. 1948
Polyporus rosularis G. Cunn. (1948)
Polyporus rosularis G. Cunn. 1948
Polyporus rosularis G. Cunn. (1948)
Polyporus rosularis G. Cunn. 1948
Polyporus rosularis G. Cunn. (1948)

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taxonomic status
pro parte
typification
Type New Zealand PDD 3914

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1cb1acfa-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
2 October 2001
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