Tuber gibbosum

Tuber gibbosum is a species of truffle in the genus Tuber.[1] It is found in the Pacific Northwest region of the United States, where it grows in an ectomycorrhizal association with Douglas-fir. It is commercially collected between as early as October and into March.[2]

Tuber gibbosum
Scientific classification
Kingdom:
Fungi
Phylum:
Ascomycota
Class:
Pezizomycetes
Order:
Pezizales
Family:
Tuberaceae
Genus:
Tuber
Species:
T. gibbosum
Binomial name
Tuber gibbosum
Harkness (1899)
Tuber gibbosum
float
Mycological characteristics
glebal hymenium
hymenium attachment is not applicable
lacks a stipe
spore print is blackish-brown to brown
ecology is mycorrhizal
edibility: choice

Taxonomy and phylogeny
 
 
 
 
 
 

Tuber gibbosum

 
 

Tuber bellisporum

 
 
 

Tuber castellanoi

 
 
 

Tuber oregonense

 
 
 
 

Tuber sphaerosporum

 
 
 

Tuber anniae

 
 

Tuber borchii

 
 
 
 
 

Tuber irradians

 
 
Phylogeny of Tuber species in the Gibbosum clade, based on ribosomal DNA sequences.[1]

The species was first described by American mycologist Harvey Wilson Harkness in 1899.[3] The specific epithet derives from the Latin word gibbosum meaning "humped", and refers to the irregular lobes and humps on larger specimens. T. gibbosum is part of the gibbosum clade of the genus Tuber. Species in this clade have unusual "peculiar wall thickenings on hyphal tips emerging from the peridial surface at maturity."[1]

T. gibbosum resembles the similar species T. oregonense, and both are found growing under Douglas fir.

Fruit body

Edibility

T. gibbosum is edible and can be prepared similarly to European truffles; it is typically used to add flavor to a dish.[4]

See also

References
  1. Castellanoi G, Trappe JM, Rawlinson P, Vilgalys R (2010). "Improved resolution of major clades within Tuber and taxonomy of species within the Tuber gibbosum complex". Mycologia. 102 (5): 1042–1057. doi:10.3852/09-213. PMID 20943504. S2CID 27719272.
  2. Winkler Daniel (2013). "Truffles of the Pacific Northwest". Fungi. 6 (4): 16–19.
  3. Phillips W, Harkness HW (1899). "Californian hypogaeous fungi". Proceedings of the California Academy of Sciences. 8. 3 (8): 241–291.
  4. Volk, Tom (1997). "Tom Volk's Fungus of the Month for January 1997". Tom Volk's Fungi.
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