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Finally picked up a specimen to preserve. This one is particularly nice: dry cap, surface and flesh and hymenium all purplish. Clearly associated with Nothofagus pumilio.

(number 0226.4, page 175)

Species Lists


Proposed Names

47% (2)
Recognized by sight
57% (1)
Used references: [as Thaxterogaster violaceus] This truffle-like, hypogeous Thaxterogaster is well distinguished by its shape and color. The cap of the peculiar fruiting bodies does not open to expose the lamellae, but always remains closed. The fungus develops in litter of Nothofagus (ectomycorrhiza) and due to the lack of an up-lifting stipe not more than the top of the cap emerges above the surface of the forest floor.
Pileus up to 6 cm diam., globose, irregularly subglobose, whole fruiting body more or less fig-shaped, pale lilac soon turning grey to silvery, sericeous, dry. Gleba (lamellae) composed of irregular, small chambers, rust brown*. Stipe -5 x – 2.2 cm, turbinate to subcylindrical, often rudimentary, rarely transcurrent through the gleba, white, dry. Flesh present in stipe only, white. Odor and taste not distinctive but fetid in overmature specimens. (Gamundi, I. & E. Horak, 1995. “Fungi of the Andean-Patagonian forests.” Buenos Aires: Vazquez Mazzini Editores, pg. 119.)

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Add Comment
By: Danny Newman (myxomop)
2013-01-15 14:44:02 CST (-0500)

the “rust brown” gleba is the mature color (Singer’s original description at the T. violaceus name page chronicles this in somewhat gratuitous detail). These are likely immature.