Hydnum ovoideisporum

Hydnum ovoideisporum Olariaga, Grebenc, Salcedo & M.P. Martín, Mycologia 104(6): 1446. 2012.

MycoBank MB563524

AUTHOR: Olariaga, I.
Taxonomic classification

phy Basidiomycota

sbp Agaricomycotina

cls Agaricomycetes

sbc Agaricomycetidae

ord Cantharellales

fam Hydnaceae

gen Hydnum

sp Hydnum ovoideisporum


Basidiomata small to medium, growing isolated or fasciculate. Pileus 12–40 mm diam, generally non-fleshy, initially convex, plane afterward, sometimes depressed or umbilicate in the center, regular, seldom dimidiate. Surface velutinous, sometimes with small and erect scales at the margin, non-staining, not zoned. Colour brownish orange to deep reddish orange, pale orange in unexposed zones or basidiomata, pale orange or white toward the margin. Margin initially involute, soon straight, somewhat sinuous and lobed with age. Stipe 20–40 × 2.5–9 mm, cylindrical or broader at the base, central or somewhat excentric, solid, velutinous, white to pale ochre. Staining ochre when handled, sometimes conspicuous. Spines normally non-decurrent, sometimes leaving a bare zone around the stipe and with small decurrent spines, conical, not flattened, acute, not fimbriate, sometimes joined at the base, crowded, 2.0–3.1 × 0.2–0.4 mm, initially orange white, pale orange ochre afterwards. Context white, staining. Odour weak, fruity, citric-like; flavour mild, bitter afterwards. Macrochemical reactions: KOH + context = pale greenish ochre. Basidiospores ovoid to broadly ellipsoid, sometimes some cylindrical, apiculus cubic, thin-walled, nonamyloid, (7.5–)8–10(–10.5) × 6–7.5 µm (Lm=8.1– 9.3; W m=6.4–7.1; Q m=1.27–1.38). Basidia suburniform to claviform, 4–5-spored, sometimes with scattered one, two or three-spored ones, clamped, 36– 56 × 7–9.5(–12) µm. Hyphae of the apex of the spines arranged in parallel, cylindrical, thin-walled, yellow, clamped, with cylindrical to subclaviform ends (3–5 µm wide), without crystals. Pileipellis composed of hyphae forming a cutis-trichoderm, cylindrical to swollen, thinwalled, colourless to yellowish, clamped, 5.5–14 µm wide, with cylindrical and blunt ends. Stipitipellis composed of hyphae forming a trichoderm, cylindrical, thin-walled, with orange content, clamped, 3–5 µm wide, with cylindrical to narrowly claviform ends. Hyphae of the context woven, cylindrical to swollen, thin-walled, colourless to yellowish, clamped, 4–14 µm wide. Basal mycelium white, composed of woven hyphae, cylindrical, thin-walled, clamped, 4–5.5(–7) µm wide, with some ampullate at septa (6.5–8.5 µm).


References in our territory


Specimens in scientific collections

* sequenced material

Reference specimen marked in bold

B: ARAN-Fungi 07768 (det. I. Olariaga)

Bu: BIO-Fungi 9676 (det. I. Olariaga)

Cs: ARAN-Fungi 2148 (det. I. Olariaga)

Gr: GDAC 10508 (det. I. Olariaga)

H: GDAC 35130; JA 235 (det. I. Olariaga)

Hu: BIO-Fungi 12317*; BIO-Fungi 9982 (det. I. Olariaga)

J: JA 2272 (det. I. Olariaga)

Ma: ARAN-Fungi A8000009 (det. I. Olariaga)

Mn: GM151112-4.

Na: ARAN-Fungi A5041287

SS: BIO-Fungi 14130* (det. I. Olariaga)

Vi: BIO-Fungi 12683* (det. I. Olariaga); BIO-Fungi 9683 (det. I. Olariaga); BIO-Fungi 12902* (det. I. Olariaga); BIO-Fungi 12672 (det. I. Olariaga); BIO-Fungi 12669 (det. I. Olariaga).

Z: BIO-Fungi 9980 (det. I. Olariaga); BIOFungi 9987 (det. I. Olariaga).


Sequences in public databases obtained from material collected in our territory

BIO-Fungi 12683: HE611081 (ITS)

BIO-Fungi 14130: HE611083 (ITS)

BIO-Fungi 12902: HE611082 (ITS)

BIO-Fungi 12317: HE611080 (ITS)


Hydnum ovoideisporum

Photograph: I. Olariaga. Specimen: BIO-Fungi 12683 (Holotype)













a) Basidiospores. b) Basidia. Drawings: I. Olariaga.

How to cite this sheet:

Olariaga I. 2020. Hydnum ovoideisporum Olariaga, Grebenc, Salcedo & M.P. Martín. Fichas SIM (updated on 17-V-2020)