Truffle Genus: Gastrosuillus
 Gastrosuillus amaranthii basidiospore |
Kingdom: Fungi Phylum: Basidiomycota Order: Boletales Family: Boletaceae |
Spore Characters
Surface: Smooth.
Shape and Size: Ellipsoid to subcylindric, 6.5-8.2 x 3-4 µm.
Wall: Thin.
Color in Water: Hyaline to pale brown.
Melzer's Reaction: Not distinctive.
Comments: The spores of this genus may be difficult to differentiate from those of Gastroboletus. Some mycologists combine the genus Gastrosuillus into the mushroom genus Suillus.
View photos of Gastrosuillus spores
Sporocarp Characters
Shape and Size: 10-35 mm, convex to irregular or depressed. Stem and columella present.
Peridium: Glabrous and slightly viscid, brown.
Gleba: White to pale yellow, purple reaction to KOH. Composed of multiple tubes or open chambers.
Odor: Mild.
View photos of Gastrosuillus sporocarps