It cannot be NA (means taxonomy not resolved). It appear to be a good species.
Christian’s response: I agree with NE. Not Evaluated. It is a good species, sure, but taxonomy also involves identification criteria, which is not resolved. We do not know whether the “hepatica” that is more common in Eastern north America ever shows these intense pink tones. Unlikely, but perhaps there is overlap in color.
Either NE or an assessment. Have a global (Mexico-focused)perspective and in that context question if records from USA may be conspecific. It is such vividly colored and large species that it cannot be much overloked. must be rare (although rareness per se does not mean red-listing). Try to narrow down its habitat and use that to infer distribution and stutus. I see 18 records from Mexico.
Must be NE. We cannot narrow down habitat without more experience with the species. We suspect it is a temperate to subtropical oak-associated species. But that is either quite broad or overly general.
We cannot infer distribution and status without critical comparison of North American and Mexican specimens and more surveys of Mexican forests.
Despite the fruitbodies being large and extremely brightly colored, records are scarce, and thus the species is apparently uncommon. There are significant threats to the known habitats in the form of deforestation for lumber, firewood, and wholesale land conversion to avocado plantations.
Appears to be a distinct species from the North American cognate of Fistulina hepatica by virtue of the bright magenta pink colors and often tall, radicating and/or branched stipe.
However, occasional specimens in areas where F. hepatica (sensu N. America) is more common show the pink/magenta colors, and may either represent a color variant of F. hepatica of or may represent disjunct populations of F. guzmanii (perhaps relictual, perhaps due to post-glacial northward expansion).
At least one United States specimens seems an excellent morphological match for F. guzmanii:
Thus, we surmise that this species most likely has a scarce occurrence over a wide range, but taxonomic work is needed to determine for certain whether the United States specimens are conspecific with the Mexican specimens.
Originally described from near Tepotzlan, Morelos, at an altitude of 1990 meters. So far found at mid-elevations in subtropical mixed Quercus forests in the states of Morelos, Jalisco, and Colima, Mexico.
Specimens that are perhaps assignable to this taxon have also been found throughout the Eastern United States, from Black Mountain, North Carolina north to Falmouth, Massachussetts.
There is insufficient data to make robust assessments of population size, biogeographic range, or population trends.
Population Trend: Uncertain
Originally described as growing on living Mimosa galeottii (up to 2.5 m above the ground) in subtropical mixed deciduous forests with abundant Quercus spp., around 1800-2000 m elevation. More recent reports describe it as fruiting from the ground near oak trees.
There are significant threats to the known habitats of this species in the form of deforestation for lumber, firewood, and wholesale land conversion to agriculture.
Taxonomic research: Determine whether United States and Mexican specimens are conspecific.
Establish reliable identification criteria.
Ecological research: Determine whether this species grows on living trees, dead wood, logs, etc., and whether the fruitbodies emerge from the ground or directly from wood, or both. Determine the host range (Quercus and Mimosa? others?).
Biogeographic/population research: Determine whether this species grows only in certain latitudes of the Mexican oak forests, or whether it is present in other parts of the country (especially further north) to gain a better picture of whether or not the Mexican population is disjunct or more continuous with the United States taxon.
Edible, but not known to be commonly harvested for food. Not presumed to be threatened by harvest for consumption.
Brusis, O.A. 1972. A new species of Fistulina from Mexico. Mycologia. 64:1248-1252
Gómez-Mendoza, L.; Arriaga, L. (2007). Modeling the Effect of Climate Change on the Distribution of Oak and Pine Species of Mexico. Conservation Biology, Vol. 21, No. 6: pp. 1545-1555