When: 2009-01-15

Collection location: Reserva Nacional Cerro Castillo, Aisén, Chile [Click for map]

Who: Jason Hollinger (jason)

No specimen available

More normal size — 3 to 4 cm wide — and dry. Either silvery or with a purplish hue. Sour odor.

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By: Danny Newman (myxomop)
2013-01-14 17:08:23 CST (-0500)

Gamundi & Horak describe both T. magellicanus and T. violaceus as having lilac/violet tones. T. magellicanus is said to be “lilac or violet soon fading to whitish or pale yellow brown…”, while T. violaceus is “pale lilac soon turning grey to silvery”. In Singer’s 1951 paper Thaxterogaster: A New Link between Gastromycetes and Agaricales (Mycologia 43:2 215-228) he differentiates between the two precisely on the basis of T. magellicanus altogether lacking the purple by which T. violaceus is identified (see pgs. 219-220).

Add to that the newer species described by Halling in 1981 (see Thaxter’s Thaxterogasters and Other Chilean Hypogeous Fungi in Mycologia 73:5 853-868), in which there is little to no mention of either magellicanus or violaceum, but provides some discussion on T. subalbidus which bears a strong resemblance to T. violaceum, particularly here:

The gastrocarps can be up to 4.5 cm broad and 4 cm tall; the peridium is lavender blue to violet blue or purplish when fresh, but becomes whitish when drier. The gleba is lavender to purplish brown and the stipe is white.

T. violaceus sensu Gamundi & Horak has a rust brown gleba, but similar dimensional limits, a white stipe, and the same color progression…

Going to look into this some more. This is the region of the genus’ type locality after all. It shouldn’t be too difficult.