Subpopulations of Xilaria liquidambaris are known from at least five countries in two continents, and its distribution may be wider if the potentially mistaken identifications of X. persicaria growing in fruits of Liquidambar are considered.
This species is assumed to be specific associate to, at least, two species of Liquidambar, both of which are considered Least Concern by IUCN criteria.
Considering that the habitat for this species is not threatened or in decline,  this species is considered to be Least Concern.

Xylaria liquidambaris J.D. Rogers, Y.M. Ju & F. San Martín [as ‘liquidambar’], in Rogers, San Martín & Ju, Sydowia 54(1): 92 (2002)

This species was described as Xylaria liquidambar, but later on the specific epithet was changed for its publication in the Index Fungorum to “liquidambaris”, to fit the corresponding gender.  Even when most of the records for the species are under X. liquidambaris, the spelling “liquidambar” is occasionally used, under the argument that the epithet is a noun in apposition, rather than an adjective, and it can retain its own gender according to the ICBN article 23.5 (Ju et al. 2018). The etymology in the protologue indicates “For the host of the fungus” (Rogers et al. 2002), and it may not be clear if the epithet is adjectival or not, but the records for this species in public databases (MyCoPortal, GBIF, etc) follows the spelling suggested by Index Fungorum (Index Fungorum Registration Identifier 383999).

This species can be recognized by its cylindrical stromata, with acute sterile apex; stipes glabrous to pubescent; fertile part brown and then becoming black, interior white. Asci 8 spored, spores 12-15 x 4-6.5µm. The species grows in fruits of Liquidambar styraciflua, and L. formosana.
Descriptions in Rogers et al. (2002).

This species can be mistaken with X. persicaria, and it is possible that several records for X. persicaria growing in fruits of Liquidambar may correspond with X. liquidambaris.
This species was recovered in the X. hypoxylon clade by Hsieh et al. (2010), based on specimens collected in China, growing in fruits of Liquidambar formosa.

This species grows over fruits of Liquidambar styraciflua, and L. formosana., which are trees with wide distribution in America and Asia, and considered as Least Concern by the IUCN criteria. Considering that it is easily mistaken with X. persicaria, its geographical range may be wider.
This species can inhabit a diverse range of habitats, that include mountain cloud forest, temperate forest, and any other habitat, natural and cultivated, were the host tree can develop.

North America and East Asia. This species was originally described from Florida, in the USA, but also it has been recorded from Mexico, Japan, China, and Taiwan. The species broadly follows the distribution of the trees which it is associated, Liquidambar styraciflua and L. formosana.

This species has been collected from five countries in two continents since it was described in 2002. Also this species can be mistaken with X. persicaria, so additional records may come from specimens of X. persicaria growing on fruits of Liquidambar styracifula (in America) or L. formosana (in Asia).
The trees species which with X. liquidambarensis is associated, are considered Least Concern (LC) by the IUCN. So given its large EOO and its association to a non threatened ecosystem, its populations are not threatened.

This species is a saprotroph specific to fruits of Liquidambar styracifula and L. formosana, and follows the distribution and habitat of those trees.

There are no mayor threats for this species. Xylaria liquidambarensis is assumed to be associated specifically to Liquidambar styraciflua and L. formosana. which are species considered of Least Concern by the IUCN. Subpopulations in mountain cloud forest are susceptible to the effect of climate change.

Conservation actions are related with conservation of the habitat, and conservation of the associated plant species. In Mexico the subpopulations located in mountain cloud forest should be under some protection program, because that vegetation type is considered vulnerable, and under protection.

For this species research needed for corroborate the specificity of Xylaria liquidambarensis with its plant associates, or to corroborate the possible association with other species. Also this species have a very wide distribution, and it is possible that this species may represent a species complex.

There are no uses or trade associated with this species.

Hsieh, H. M., Lin, C. R., Fang, M. J., Rogers, J. D., Fournier, J., Lechat, C., & Ju, Y. M. (2010). Phylogenetic status of Xylaria subgenus Pseudoxylaria among taxa of the subfamily Xylarioideae (Xylariaceae) and phylogeny of the taxa involved in the subfamily. Molecular Phylogenetics and Evolution, 54(3), 957-969.
Rogers, J. D., Martin, F. S., & Ju, Y. M. (2002). A reassessment of the Xylaria on Liquidambar fruits and two new taxa on Magnolia fruits. SYDOWIA 54(1), 91-97.