Hyphodontia spathulata

Select illustrations:

H. aff. spathulata, FO 42367 from Taiwan

Synonyms:

= Hydnum spathulatum Fr. 1821, Syst. Mycol. I, p. 423.

Neotype designated by E. Langer 1994, Bibl. Mycol 154: 213. Sweden, Upland, Tierp sn., island Prästö in the river Dalälv, on deciduos wood, leg. L. Romell, 17.08.1913, in Herb. L. Romell Nr. 4981, Herbarium S.

= Hyphodontia spathulata (Schrad.: Fr.) Gilb. in Petersen 1971, Evol. higher Basidiom., p. 300.

Macromorphology:

Micromorphology:

Spores:

4-5.5 x 3-4 µm, ellipsoid, thin-walled, smooth, inamyloid, with one droplet each.

Basidia:

12-23 x 4-5 µm, suburniform, with one to two constriction and one basal clamp each, sometimes basidial repetition.

Sterigmata:

Four, up to 3,5 µm long.

Cystidia:

1. capitate cystidia with one basal clamp, 20-50 x 4-5 µm, apical with droplets of exsudat. The exsudat from the herbarium specimens is not soluble 5% KOH solution. The cystidia arise from the hymenium or subhymenium.

2. moniliform cystidia (constricted like a string of pearls), apical tapering. 3% Pholoxin solution dyes their content more then in the surrounding hyphae. The cystidia arise from the subhymenium with one basal clamp each.

Clamps:

All primary septa with one clamp each.

Hyphae:

Hyphal system monomitc. Basal and subicular hyphae 2-3.5 µm in diameter, thin-walled up to slightly thick-walled (up to 5 µm), more or less strongly encrusted with needle-like crystals, which are not soluble in 5% KOH solution. In basal parts of the basidiocarp there are often accumulations of rough, polyedric crystals. Subhymenial hyphae 2-4 µm in diameter, thin-walled, not incrusted. In the hymenium and suhymenium lots of collapsed, empty basidia are present. Hyphal branching by subseptal outgrowing or outgrowing of clamps.

Aculei:

The hyphae of the aculei are thin-walled and run parallel. Hyphal ends are tapering.

Habitate and substrate:

Biogeography:

Remarks:

Capitate ventricose cystidia present
  Aculei very small, at most 1 mm long................H. breviseta
  Aculei up to 2 mm long, cylindrical to spathulate...H. spathulata
Capitate ventricose cystidia not present..............H. mollis

Herbarium specimens:

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