Normally a species like this would not be considered for red listing; a fairly nondescript, recently described (2016) species from a single collection. However, taking into account the fact that Dr. David Largent has spent 45 years living and looking for Entolomataceae in this area, and doing a monograph Entolomataceae in western North America never found it.
Bases on this assessment, we consider the population to be under 1,000 mature individuals and a D1 Vulnerable.
A recently discovered (2013) and described species (2016).
Known from a single collection in old growth Coast Redwood forest, from an area where Entolomataceae have been intensively studied for close to 45 years.
Known from a single location in coastal northern Humboldt County, California, USA
A recently described species from old growth Coast Redwood forest. This was the first record of a Pouzarella from coastal Humboldt County. Dr. David Largent; who has spent over 45 years in the area, researching, hunting and surveying for fungi, (and specializing in Entolomataceae) had never found a Pouzarella in this area.
Despite extensive mushroom surveys over the past 40 years in Redwood National and State Parks, it’s currently known from a single collection, made in 2013. Despite many attempts to locate other populations in the area, it has not been found since.
Population Trend: Uncertain
Likely a saprobe, growing in duff, rotting bark and other debris under old growth Big-leaf Maple, (Acer macrophyllum), Coast Redwood (Sequoia sempervirens) and Sword Fern (Polystichum munitum).
Fire suppression seems to have had a negative effect on Hygrocybe, Leptonia and other Entolomatoid fungi in the old growth redwood forest.
More surveys in the area to locate other locations of this species.
If understory burns will promote the growth of some of the rare Hygrocybe and Entoloma in the area.
Pouzarella alissae, a new species from northwestern California, United States
Mycotaxon, Volume 130 (4), October-December 2015. pp. 1153-1164(12) Largent, David L.; Bergemann, Sarah E.