Picture of Mushrooms

Roy E. Halling

Curator Emeritus (Mycology), Institute of Systematic Botany

Ph.D., University of Massachusetts
Amherst, 1980


Agaricales and Boletales (mushrooms, puffballs and related groups)


Fungi (Mushrooms and related fungi)

Research locations



Major research emphasis is on the classification, systematics, biogeography, and diversity of mushrooms. Mushrooms are important in the world’s ecosystems as primary decomposers, litter binders, and nutrient recyclers. In addition, they form obligate and necessary root symbioses with forest trees to maintain ecosystem health and integrity. Explorations and inventory of fungal diversity requires field work around the world in northern and southern temperate zones as well as the neo- and paleotropics. Field efforts in these areas have added substantially to general investigations on tropical and temperate fungi. Explorations have emphasized surveys to document the diversity, evolutionary & mycorrhizal relationships, and distribution of the Boletineae (a suborder of porcini-like mushrooms). International collaboration with other specialists is underway on systematics, biogeography and phylogeny of Bolete mushrooms with particular emphasis in Australia and SE Asia.

Selected Publications

Montoya, L., A. Ramos, R.E. Halling, V.M. Bandala. 2022.
A new species and a new record of Tylopilus (Boletaceae) of the balloui group in lowland and montane forests from Eastern Mexico.
Mycological Progress 22: 1-14 (https://doi.org/10.1007/s11557-022-01850-9)

Liimatainen, J.F. Ammirati, T. Niskanen, A. Corrales, C. Ovrebo, B. Dima, R. Halling, D. Savage. 2022.
Nomenclatural novelties.
Index Fungorum no. 528: 1-10.

Matheny,P.B., A. Corrales, M.G.Graddy, R.E. Halling, J. KallichMan, L.V. Kudzma, C.L. Ovrebo, R.A. Swenie, N.C. Walker. 2022.
A revision of the Inocybe grammata group in North America including four new taxa.
Brittonia (https://doi.org/10.1007/s12228-022-09720-0)

Liu, J.-W., Z.-W. Ge, E. Horak, A. Vizzini, R.E. Halling, C.-L. Pan, Z.L. Yang. 2021.
Squamanitaceae and three new species of Squamanita parasitic on Amanita basidiomes.
IMA Fungus 12: 1-24. (open access: https://doi.org/10.1186/s43008-021-00057-z).

Guard, F.E., S. McMullan-Fisher, J. Van Wyk, T. Lebel, R.E. Halling. 2021.
Austroboletus yourkae sp. nov.
Persoonia 47: 276-277 (Fungal Plant 1336).

Ovrebo, C.L., R.E. Halling, K.W. Hughes, M. Kuo. 2021.
New species and records of Tricholoma (Agaricales: Tricholomataceae) sections Genuina and Megatricholoma from Costa Rica and United States.
Journal of the Botanical Research Institute of Texas 15(2): 545-557. (open access: https://doi.org/10.17348/jbrit.v15.i2.1160).

Osmundson, T.W., N.L. Bougher, R.M. Robinson R.E. Halling. 2021.
Rubinoboletus phaseolisporus (Boletaceae) from Western Australia is a Tylopilus with bean-shaped spores.
Nuytsia 32: 87-97.

Vadthanarat, S., R.E. Halling, M. Amalfi, S. Lumyong, O. Raspé. 2021.
An unexpectedly high number of new Sutorius (Boletaceae) species from northern and northeastern Thailand.
Frontiers in Microbiology 12: 1-27. (open access: https:doi: 10.3389/fmicb.2021.643505).

De Crop, E., L. Delgat, J. Nuytinck, R.E. Halling, A. Verbeken. 2021.
A short story of nearly everything in Lactifluus (Russulaceae).
Fungal Systematics and Evolution 7: 133-164.

Halling, R.E., N. Fechner, N. Davoodian. 2020.
Veloboletus limbatus, gen. et sp. nov.
Persoonia 45: 398-399 (Fungal Planet 1178).

Syme, K., G. Bonito, T. Lebel, N. Fechner, R.E. Halling. 2020.
Austroboletus asper, sp. nov.
Persoonia 45: 328-329 (Fungal Planet 1143).

Davoodian, N., K. Hosaka, O. Raspé, O.A. Asher, A.R. Franck, A. De Kesel, T.P. Delaney, J.F. Ammirati, E. Nagasawa, B. Buyck, R. E. Halling. 2020.
Diversity of Gyroporus (Gyroporaceae, Boletales): rpb2 phylogeny and three new species.
Phytotaxa 434(3): 208-218.

Delgat, L., G. Dierickx, S. De Wilde, C. Angelini, E. De Crop, R. De Lange, R. E. Halling, C. Manz, J. Nuytinck, A. Verbeken. 2019.
Looks can be deceiving: the deceptive milkcaps (Lactifluus, Russulaceae) exhibit low morphological variance but harbour high genetic diversity.
IMA Fungus 10: 14-25.

Dierickx, G., M. Froyen, R.E. Halling, K. Wisitrassameewong, L. Delgat, E. De Crop, A. Verbeken. 2019.
Updated taxonomy of Lactifluus section Luteoli: L. russulisporus from Australia and L. caliendrifer from Thailand.
MycoKeys 56: 13-32.

Vadthanarat,S., M. Amalfi, R.E. Halling, V. Bandala, S. Lumyong, O. Raspé. 2019.
Two new Erythrophylloporus species (Boletaceae) from Thailand, with two new combinations of American species.
MycoKeys 55: 29-57.

Davoodian, N., N.L. Bougher, N.A. Fechner, S.E. Bergemann, R.E. Halling. 2019.
Three new species of Gyroporus (Boletales, Basidiomycota) from Australia.
Muelleria 37: 101-107.

Khmelnitsky, O., N. Davoodian, P. Singh, O. Raspé, S.M.L. Lee, N. Fechner, G. Bonito, T. Lebel, R.E. Halling. 2019.
Ionosporus: a new genus for Boletus longipes (Boletaceae), with a new species, I. australis, from Australia.
Mycological Progress 18: 439-451.

Overbo,C.L., K.W. Hughes, R.E. Halling. 2019.
Three new species of Tricholoma from Costa Rica.
Phytotaxa 392(1): 33-44.

Davoodian, N., S.E. Bergemann, K. Hosaka, O. Raspé, N.L. Bougher, N.A. Fechner, T.W. Henkel, M. Gelardi K. Soytong, A. Naseer, B. Ortiz-Santana, T.J. Baroni, E. Nagasawa, M.E. Smith, R.E. Halling. 2018.
A global view of Gyroporus: molecular phylogenetics, diversity patterns, and new species.
Mycologia 110: 985-995.

Wang, X-H., R. E. Halling, V. Hofstetter, T. Lebel, B. Buyck. 2018.
Phylogeny, biogeography and taxonomic re-assessment of Multifurca (Russulaceae, Russulales) using three-locus data.
PlosOne doi.org/10.13712/journa.pone.025840.

Wang, X.H., R.E. Halling, V. Hofstetter, T. Lebel, B. Buyck. 2018.
Nomenclatural novelties.
Index Fungorum 358.

Thiers, B.M., R.E. Halling. 2018.
The Macrofungi Collection Consortium.
Applications in Plant Sciences 6(2):e1021.

Gelardi, M., N. Fechner, R.E. Halling, F. Costanzo. 2017.
Gymnogaster boletoides J.W. Cribb (Boletaceae, Boletales), a striking Australian secotioid bolete.
Austrobaileya 10(1): 121-129.

Han, L.H., B. Feng, G. Wu, R.E. Halling, B. Buyck, N.S. Yorou, S.T.N. Ebika, Z.L. Yang. 2017.
African origin and global distribution patterns: Evidence inferred from phylogenetic and biogeographical analyses of ectomycorrhizal fungal genus Strobilomyces.
Journal of Biogeography (DOI: 10.1111/jbi.13094)

Fechner, N., G Bonito, N.L. Bougher, T. Lebel, R.E. Halling. 2017.
New species of Austroboletus (Boletaceae) in Australia.
Mycological Progress 16: 769-775.

Chakraborty, D., K. Das, A. Baghela, S. Adhikari, R.E. Halling. 2017.
A new species of porcini mushroom from India with morphology and phylogeny.
Nova Hedwigia 105(1-2): 197-204.

Han, L.H., B. Buyck, N.S. Yorou, R.E. Halling, Z.-L. Yang. 2017.
Afroboletus sequestratus (Boletales), the first species with sequestrate basidioma in the genus.
Phytotaxa 305(1): 11-20.

Wu, G., K. Zhao, Y.-C. Li, N.-K. Zeng, B. Feng, R.E. Halling, Z.-L. Yang. 2016.
Four new genera of the fungal family Boletaceae.
Fungal Diversity 81: 1-24.

Zhao, K., G. Wu, R.E. Halling, Z.L. Yang. 2015.
Three new combinations in Butyriboletus (Boletaceae).
Phytotaxa 234(1): 51-62.

Halling, R.E., N. Fechner, M. Nuhn, T. Osmundson, K. Soytong, D. Arora, M. Binder, D. Hibbett. 2015.
Evolutionary relationships of Heimioporus and Boletellus (Boletales), with an emphasis on Australian taxa including new species and new combinations in Aureoboletus, Hemileccinum and Xerocomus.
Austral. Syst. Bot. 28(1): 1–22.

Zhu, X.-T, G. Wu, K. Zhao, R.E. Halling, Z.-L. Yang. 2015.
Hourangia, a new genus of Boletaceae to accommodate Xerocomus cheoi and its allied species.
Mycol. Progress 14:37 (DOI 10.1007/s11557-015-1060-0).

Halling, R.E., D.E. Desjardin, N. Fechner, D. Arora, K. Soytong, B.T.M. Dentinger. 2014.
New Porcini (Boletus sect. Boletus) from Australia and Thailand.
Mycologia 106: 830-834.

Davoodian, N., R.E. Halling. 2013.
Validation and typification of Gyroporus purpurinus.
Mycotaxon 125: 103-105.

Kuo, M, A.S. Methven, A.M. Minnis, R.E. Halling. 2013.
Studies of North American macrofungi, 1. Validation of Lactarius rubidus comb. nov. and Leccinellum quercophilum sp. nov.
Mycotaxon 124: 323-332

Nuhn, M., M. Binder, A.F.S. Taylor, R.E. Halling, D.S. Hibbett. 2013.
Phylogenetic overview of the Boletineae.
Fungal Biology 117: 479-511.

Trappe, J.M., M.A. Castellano, R.E. Halling, T.W. Osmundson, M. Binder, N. Fechner, N. Malajczuk. 2013.
Australasian sequestrate fungi 18: Solioccasus polychromus gen. & sp. nov., a richly colored, tropical to subtropical, hypogeous fungus.
Mycologia 105: 888-895.

Halling, R.E., Nuhn, T.W. Osmundson, N.A. Fechner, J.M. Trappe, K. Soytong, D. Arora, D. S. Hibbett, M. Binder. 2012.
Affinities of the Boletus chromapes group to Royoungia and the description of two new genera, Harrya and Australopilus.
Australian Systematic Botany 25: 418-431.

Halling, R.E., Nuhn, N.A. Fechner, T.W. Osmundson, K. Soytong, D. Arora, D. S. Hibbett, M. Binder. 2012.
Sutorius: a new genus for Boletus eximius.
Mycologia 104: 951-961.