5. Hydnophlebia omnivora (Shear) Hjortstam & Ryvarden, Synopsis Fungorum 26: 10-23. 2009 Figs 6, 9

Basionym .

Hydnum omnivorum Shear, J. Agric. Res. 30: 476. 1925

Type.

USA, C.L.S. Type on Osage Orange [ Macura pomifera], near Paris, Texas. C.R. Shear coll. Sept. 1903, no. 5267. In herbarium BPI! (holotype).

Description.

Basidiome effuse in small and poorly developed patches, cream-coloured in dry specimens. Hymenophore, according to Burdsall (1985), hydnoid, aculei conical to subcylindrical, 0.6-1 mm long; broken or poorly developed in type material. Margin floccose to fibrillose, white, with strands poorly developed.

Hyphal system monomitic; subicular hyphae 8-11 µm wide, with clamps occasionally double, thick-walled, loosely interwoven; strand hyphae 5-9 µm wide, with a few clamps, thick-walled, colorless; aculei hyphae 4−5 µm wide, without clamps, thin-walled, growing perpendicular to the substrate; subhymenial hyphae 5−6 µm wide, without clamps, thin-walled, densely interwoven, short-celled. Cystidia cylindrical, slightly tapered to apex, thin-walled, 40−70 × 4−5 µm . Basidia cylindrical to subclavate, 17−21 × 6−7 µm, with 4 sterigmata, basal clamp absent. Spores ellipsoid, 5−6.5 × 3−4 µm (L/W = 1.6), thin-walled, colorless, smooth.

Ecology and distribution.

Described from Texas (Shear 1925). According to Burdsall (1985) this species is distributed in the arid regions of southwestern United States, and probably into southern California and northern Mexico. Also reported from Florida (Ginns and Lefebvre 1993) and Uruguay ( Martínez and Nakasone 2005).

Remarks.

Molecular analyses indicate that this species is related to H. meloi . Morphologically they can be distinguised by the shape and size of spores, subglobose 4−5.5 × 3−4 µm in H. meloi, and ellipsoid 5−6.5 × 3−4 µm in H. omnivora .