Name: Hypholoma subviride
Author: (Berk. & M.A. Curtis) Dennis
Citation: Kew Bull. 15(1): 134 (1961)
Pileus 4-35 (-45) mm diam., first conical, convex, then finally flattened, with or without an umbo; color yellow (5Y 7/6-7/8) in younger stages then sulphur yellow; surface smooth, subviscid to dry; margin regular, little or not striate, rarely bearing velar remnants; context thin, greenish. Lamellae adnate, close; color firstly sulphur yellow, then dark reddish brown (5YR 2.5/2-3/2) with the maturity of basidiospores; margin regular, with the same color as the sides. Stipe (7-)14-66×1-4 mm, central, cylindrical, with little expanded base; color sulphur yellow; surface dry to little humid, longitudinally striate; basal mycelium whitish, poorly developed, rhizomorphs absent. Veil arachnoid, very ephemeral, observed in earlier stages and absent in adult basidiomata.
Spore print dark vinaceous brown.
Basidiospores (5.5-)6-8(-9)× 3.5-5 μm, (Q =1.50-2.00, Qm =1.71, n =148), ellipsoid to slightly ovoid both in side and frontal view; smooth and thick-walled, with truncate germ-pore; color yellowish brown in KOH. Basidia 15-23×4.5-7 μm, clavate, bearing four sterigmata. Pleurocystidia (19-)25-38(-47)×(5.5-) 8-12 μm, as chrysocystidia, fusoid to clavate, with mucronate apex; smooth and thin-walled, with yellowish amorphous content, numerous in the gill sides. Cheilocystidia (13-)18-22(-26)×6-8 μm, as leptocystidia, utriform to cylindrical, with rounded apex; hyaline, lacking yellowish contents; hard to find in dry specimens. Pileipellis composed by parallel, poorly gelatinized hyphae, 5-9 μm diam., with walls slightly thickened and incrusted by yellowish pigments. Hypodermium cellular, formed by subglobose hyphae, 15-29 μm diam. hyphae, with walls thickened and incrusted by yellowish pigments. Context composed of interwoven, hyaline hyphae, smooth and thin-walled, 5-10 μm diam. Hymenophoral trama regular, formed by hyphae with slightly incrusted walls, yellowish in KOH, 3-7(-10) μm diam. Stipitipellis composed of parallel hyphae, smooth and thin-walled, 3-7 μm diam. Caulocystidia 30-44(-60)×8-10 μm, as chrysocystidia, similar to the pleurocystidia; scattered in the stipe apex, hard to find in dry specimens. Clamp connections present in most septa.
Habitat: cespitose to fasciculate on wood of Eucalyptus spp., Araucaria angustifolia (Bertol.) O. Ktze., Prunus sellowii Hoehne, among others.
Distribution: Widespread in tropical and subtropical areas of Africa (Pegler 1977; Reid & Eicker 1999), Asia (Pegler 1986), Central America (Pegler 1983), Europe (Krieglsteiner & Enderle 1986), North America (Smith 1951), and South America (Dennis 1970; Pulido 1983).
Created: 2007-06-19 02:28:14 CDT (-0400) by Nathan Wilson (nathan)
Last modified: 2018-11-16 05:24:23 CST (-0500) by walt sturgeon (Mycowalt)
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