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Mucilopilus viscidus var. macrosporus (McNabb) Wolfe 1979

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Mucilopilus viscidus var. macrosporus (McNabb) Wolfe, Mycotaxon 10 124 (1979)

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Wolfe
McNabb
(McNabb) Wolfe
1979
124
ICN
var.
Mucilopilus viscidus var. macrosporus

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Mucilopilus viscidus var. macrosporus (McNabb) Wolfe 1979

Fruitbody one. Pileus 3 x 0.3 cm, surface glabrous, smooth, uninterrupted, appears to have been viscid when fresh, vinaceous brown, pores gelatinized. Stipe 5 x 0.7 cm, obclavate, yellow-tan to khaki with minute pruina scattered over the surface. Pileus cuticle an interwoven ixotrichodermium; terminal cells 2.5 - 5 µm diam. (dm = 4 µm), equal, hyaline in KOH, yellow in Melzer's. Tube trams, hyphae 4 - 6.5 µm diam. (d = 5 µm), boletoid, hyaline in KOH, yel low in Melzer's, some appearing subgelatinous. Clamp connections absent. Basidia 32.5 - 41.5 x 8 - 10.5 µm (Dm = 35 x 9 µm), thin-walled, clavate, 2 - 4 sterigmate, hyaline in KOH, yellow in Melzer's (Fig. 4). Pleurocystidia 43 - 53.5 x 9 - 12 µm (Dm = 52 x 9 µm), thin-walled, fusoid-ventricose, hyaline in KOH, yellos in Melzers, rare; cheilocystidia 54.4 - 93.5 x 5 - 8 µm (Dm = 65 x 6.5 µm), thin-walled, subclavate to equal, occasionally with a secondary septum, hyaline in KOH, yellow in Melzer's (Fig. 5); caulocystidia 23.5 - 78 x 6.5 - 9 µm (Dm = 39 x 8 µm), thin-walled, equal to obclavate, fasciculate, opaque cream in KOH, yellow in Melzer's, occasionally with a recurved distal end. Spores 15.5 - 24.5 x 4 - 8 µm (Dm = 19.5 x 5 µm; E = 3 - 4.8; Em = 3.8), elliptical to narrowly elliptical, inequilateral by a narrow suprahilar depression and adaxial swelling, yellow-khaki with green refractile contents in KOH, yellow to yellow-rust (dextrinoid) in Melzer's (Fig. 6); surface smooth (Fig. 19), inner distal wall discontinuity, surrounded by a hyaline membrane; in deposit "Russet", light brown.

Observations. This specimen is very similar to P. viscidus var. viscidus McNabb by the presence of the ixotrichodermium, basidial and cystidial characters. Spores of this specimen are longer by 5 µm (at the upper range limit) and by 2.5 µm at the Lm value that var. viscidus. The spore Em value is also greater than that of var. viscidus by 0.3. The spore character differences appear to be sufficiently different for varietal recognition. More studies of general collections will be necessary for confirmation of this conclusion.

Because this taxon belongs in the genus Mucilopilus the following new combination is proposed.
Mucilopilus viscidus var. macrosporus (McNabb) Wolfe, comb. nov.
Basionym: Porphyrellus viscidus var. macrosporus McNabb. 1967. New Zealand J. Bot. 5: 546.

Type specimen (holotype): PDD 25186; solitary under Leptospermum ericoides; Auckland; Waitakere Filters; 25.v.1966; R.F.R McNabb. [!]

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Mucilopilus viscidus var. macrosporus (McNabb) Wolfe 1979
Mucilopilus viscidus var. macrosporus (McNabb) Wolfe
Mucilopilus viscidus var. macrosporus (McNabb) Wolfe 1979
Mucilopilus viscidus var. macrosporus (McNabb) Wolfe (1979)
Mucilopilus viscidus var. macrosporus (McNabb) Wolfe 1979
Mucilopilus viscidus var. macrosporus (McNabb) Wolfe (1979)
Mucilopilus viscidus var. macrosporus (McNabb) Wolfe 1979
Mucilopilus viscidus var. macrosporus (McNabb) Wolfe (1979)

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1cb1b4c7-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2000
17 January 2014
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