Entoloma cf. subcoelestinum (Largent) Blanco-Dios (2015: 37)
publication ID |
https://doi.org/ 10.11646/phytotaxa.277.3.1 |
persistent identifier |
https://treatment.plazi.org/id/03808015-FF94-FF85-FF45-17A0FA20EAA4 |
treatment provided by |
Felipe |
scientific name |
Entoloma cf. subcoelestinum (Largent) Blanco-Dios (2015: 37) |
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14. Entoloma cf. subcoelestinum (Largent) Blanco-Dios (2015: 37) View in CoL , FIGURE 14 View FIGURE 14 .
≡ Leptonia subcoelestina Largent (1977: 107) View in CoL
Description:— Pileus 5 mm broad, plano-convex, depressed, dry, dull, centre appressed-squamulose, elsewhere fibrillose, striate at the margin, greyish black with violet tinges. Lamellae adnate, distant, pink with grey tinges, edge entire, concolourous. Stipe 15 × 1 mm, eccentric, cylindrical, slightly broadening towards the base, glabrous, with pruinose apex, smooth, concolourous with pileus, grey at the base. Context thin, grey. Odour none. Taste none.
Basidiospores 8.0–9.6 (–11.0) × 5.6–6.4 μm, Lm = 9.1, Wm = 6, Q = 1.3–2.0, heterodiametrical, rarely subisodiametrical, 6–7 angled in side-view, colourless. Basidia 35–54 × 8–12 μm, 4-spored, clavate, colourless, clamped. Pleurocystidia absent. Cheilocystidia absent. Pileipellis a trichoderm at the centre, terminal elements 26–80 × 6–25 μm, cylindro-clavate, oblong, subfusiform, some with mucronate apex, a cutis at the margin; with greyish blue plasmatic pigment. Caulocystidia 16–46 × 5–10 μm, cylindro-clavate, lageniform, subfusiform, utriform, colourless, in groups at the stipe apex. Clamp-connections present in all tissues except the pileipellis.
Habit and habitat:—Solitary, on soil, in cloud forest, with Abies , Quercus , Pinus , and Clethra , among others.
Material studied:— MEXICO. Jalisco, Municipality of Zapotlán el Grande, El Floripondio, slopes of Nevado de Colima, 17 August 2011, C. Torres-Preciado 259 (IBUG!).
Comments:—The Mexican specimen keys out in Entoloma subgen. Leptonia sect. Leptonia very close to L. subcoelestina , in particular due to the peculiar cystidiform elements of the pileipellis and the absence of clamp-connections. Furthermore, this species is characterized by the very small basidiomata and the basidiospores measuring 8.0–11 × 5.5–7 μm with conspicuous angles ( Largent 1994). However, this species is only known from its type-locality in Washington State, USA, growing in the coniferous humus layer ( Largent 1977, 1994). For this reason, we hesitate to confirm the conspecificity. Similar species are E. coelestinum (Fr.) Hesler (1967) from Europe and North America, with smaller basidiospores ( Largent 1994, Noordeloos 2004, Morozova et al. 2015); E. cyaneum Saccardo (1887) with larger and nodulose-angled basidiospores; E. chytrophilum with a lignicolous habit and nodulose-angled basidiospores (see also above); and E. lepidissimum Noordeloos (1982b) with nodulose-angled basidiospores, blue lamellae when young, and sometimes distinctly developed cheilocystidia ( Noordeloos 1992, Largent 1994, Morozova et al. 2015).
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Entoloma cf. subcoelestinum (Largent) Blanco-Dios (2015: 37)
Montañez, Diego, Noordeloos, Machiel E., Rodríguez, Olivia, Vargas, Ofelia & Guzmán-Dávalos, Laura 2016 |
Leptonia subcoelestina
Largent, D. L. 1977: ) |