A very interesting species. It has only been collected in the wild twice. All cultures that are in circulation today originate from one single specimen that was cloned by mycologist Stephen Pollock in 1977. This mushroom was found in Tampa, Florida hence the name tampanensis.
This species produces sclerotia (hardened mycelial structures) on grass seed and in the casing layer.
Variability within a multispore germination is great resulting in some strains that are good sclerotia-producers, some that are good fruitbody-producers, some that are both and some that are neither.
We recommend making different isolates from a multispore germination and testing each of them for their properties. Alternatively you can start with multispore cultures and clone some mushrooms or sclerotia.
Because of successive cloning for years most available strains are heavily degenerated and produce no or only sterile (sporeless) mushrooms.
We have been working for some time with a strain that did not produce fertile mushrooms but have recently acquired new one. This strain does produce fertile fruitbodies and although they are not perfectly shaped they do produce visible sporeprints.
We grow the sclerotia and fruitbodies of this species on sterilised grass seed (110 grams seed / 180 ml water). We have had jars that produced up to 70 grams (wet weight) of sclerotia in 4 months!

Substrate:
ryegrass seeds, cow manure.
Temperature:
colonization/fruiting: 24-27°C / 22-24°C

source - www.mushmush.nl

Pictures at www.mushroomobserver.org