Taxon Details: Boletellus ananiceps (Berk.) Singer
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Family:

Boletaceae (Basidiomycota)
Scientific Name:

Boletellus ananiceps (Berk.) Singer
Primary Citation:

Type studies on Basidiomycetes. VIII.
Sydowia 9: 423. 1955
Accepted Name:

This name is currently accepted.
Description:

Protologue: [Translation] - With convex floccose-sqaumose pileus broken into plane thick large warts. Wangaratta. Spores 29.7 µm.

Macroscopic description: Based on RE Halling 9893 (BRI, NY): Pileus 3.5-8 cm broad, convex to plano-convex, dry, with flattened to suberect fine pale ochraceous scales, becoming coarser and typically flattened with age, surrounded and subtended by pinkish colored tissue, with pinkish color often disappearing with age and exposure, with sterile velar flap at margin covering hymenophore when young, splitting and becoming appendiculate with maturity. Flesh yellow, quickly cyanescent and obscuring true color, with mild odor and taste. Tubes adnexed, yellow when young, greenish yellow (4D6) with age, pores concolorous becoming dull red with age, quickly cyanescent. Stipe 9.5-17 cm long, 1-1.5 cm broad, equal or rarely with a slightly bulbous base, dry, appressed fibrillose to matted fibrillose, sometimes pale red at apex, otherwise white with dull tan overtones, staining orangish brown to brown, white at base, with interior white and staining brownish orange especially downward and in base, sometimes with a hint of yellow and cyanescence in apex, very rarely with a hint of yellow and cyanescence in base.

Ectomycorrhiza: Myrtaceae (Eucalyptus, Syncarpia, Lophostemon suspected); Casuarinaceae (Allocasuarina suspected).

Distribution: Victoria, Queensland, Western Australia

Diagnostics: Pileus has some red pigmentation and becomes scaly. Pileus flesh is yellow and immediately cyanescent, which makes the flesh appear white. The stipe flesh is white and becomes brownish orange when exposed. Tubes are yellow, cyanescent, with pores becoming brownish red with age. The spores are ornamented with longitudinally oriented, narrow ribs that lack cross striae when observed with the light microscope.

Notes: The protologue is not very helpful or diagnostic. There are specific DEVELOPMENTAL characteristics on exterior color and pileus ornamentation, as well as the true colors of the flesh BEFORE oxidation, and then those color(s) of the oxidation reactions and their location. There is a pale yellow color to the flesh in the upper stipe which becomes progressively whiter downward to the base. There is cyanescence in the upper stipe and less so downward with pale brownish orange oxidation toward and at the base; this latter oxidation reaction is slower to appear than the cyanescence. Diagnostically, when viewed under the light microscope, the basidiospores possess longitudinal ribs (costae) of a narrow width and LACK cross-striae. This absence of cross-striae is in contrast to that in B. emodensis, B. dissiliens, and B. ananas.

Additional notes: The specific DEVELOPMENTAL characteristics on exterior color and pileus ornamentation can be seen in one of the images below (A to C). (A) The hyphae that eventually form the scales are superficial to those that are pigmented. (B) As the basidiome matures, the reddish pigmentation is beneath the ochre colored hyphae that will form the scales. (C) Eventually, the mature pileus exhibits the pale colored scales with the red pigmentation beneath and between the scales.