D.E. Hemmes

University of Hawaiʻi at Hilo | UHH · Department of Biology

We test our 'one-log-one-genet' sampling method for the Hawaiian mushroom Rhodocollybia laulaha - that all of the R. laulaha mushrooms collected from a single log represent a single genet. We also examine the potential expansion of single genets beyond the confines of one log and the temporal persistence of genets in nature. Finally, we estimate er...

Pseudobaeospora wipapatiae is described as new based on material collected in alien wet habitats on the island of Hawaii. Unique features of this beautiful species include deep ruby-colored basidiomes with two-spored basidia, amyloid cheilocystidia and a hymeniderm pileipellis with abundant pileocystidia that is initially deep ruby in KOH then chan...

Here we report the first population genetic examination of a fungus in Hawaii and, to our knowledge, the only investigation of a saprotrophic fungal population distributed across an oceanic archipelago. Rhodocollybia laulaha fruits abundantly in the native rain forests of Hawaii from June through December. Its range includes the geographic extent o...

An updated, annotated list of earthstars found in the Hawaiian Islands is presented that includes 19 species of Geastrum and Myriostoma coliforme. Favored habitats for these gasteroid fungi include periodically wet windward coastal Casuarina groves, windward Leucaena thickets, and leeward coastal Prosopis groves. In contrast to these nonnative vege...

The evolutionary mechanisms that give rise to microsatellite alleles remain poorly understood in general and are especially understudied for fungal microsatellite loci. The unusual G28 microsatellite locus was developed from the Hawaiian mushroom Rhodocollybia laulaha. Here, we employ a novel approach to test for allele size homoplasy and examine c...

Five new species of white-spored agarics are described from native montane wet forests in the Hawaiian Islands as follows: Callistosporium vinosobrunneum, Marasmiellus hapuuarum, Marasmius koae, Mycena marasmielloides, Pleurocybella ohiae. Comprehensive descriptions, illustrations and comparisons with phenetically similar species are provided. An i...

We tested the nuclear ribosomal intergenic spacer 1 (IGS1) to evaluate: 1) the utility of this gene region in the study of intra-lineage variation in the Hawaiian mushroom Rhodocollybia laulaha (Basidiomycota, Marasmiaceae); 2) the possibility of PCR-mediated artifacts from multiple cloned IGS1 inserts for five of the nine specimens included; and 3...

Nine species of marasmioid fungi are described from material collected in the Hawaiian islands: Marasmiellus pacificus, Marasmius pseudobambusinus var. hawaiiensis, and Marasmius radiatus are described as new; Marasmius sp. is described provisionally; Gloiocephala epiphylla, Marasmiellus mesosporus, and Marasmius androsaceus are first reports for t...

Thin sections of developing, fully expanded, and germinating chlamydospores of Phytophthora cinnamomi were studied by electron microscopy. Expanding chlamydospores had thin walls and contained nuclei, mitochondria, dictyosomes, rough endoplasmic reticulum, lipid-like bodies, peripheral vesicles, and small vacuoles with dense, spherical inclusions....

The Hawaiian mushroom Rhodocollybia laulaha was selected as a model to investigate patterns of gene flow between geographically isolated fungal populations from ecologically and bioclimatically varied sites. Its morphology (distinctive when compared to other members of the genus) and affinity for endemic Hawaiian forest suggested that it was endemi...

Additional members of the Phallales are recorded from the Hawaiian Islands. Aseroë arachnoidea, Phallus atrovolvatus, and a Protubera sp. have been collected since the publication of the field guide Mushrooms of Hawaii in 2002. A complete list of species and their distribution on the various islands is included.

Five species of boletes, Chalciporus piperatus, Suillus brevipes, S. granulatus, S. salmonicolor, and Pulveroboletus xylophilus and three species of Amanita, A. marmorata subsp. myrtacearum, A. muscaria var. formosa, and A. manicata have been collected in the Hawaiian Islands. The boletes are associated with introduced pines and the Amanita are ass...

Five species of boletes, Chalciporus piperatus, Suillus brevipes, S. granulatus, S. salmonicolor, and Pulveroboletus xylophilus and three species of Amanita, A. marmorata subsp. myrtacearum, A. muscaria var. formosa, and A. manicata have been collected in the Hawaiian Islands. The boletes are associated with introduced pines and the Amanita are ass...

Three undescribed taxa of family Xylariaceae are described from Hawaii, Hawaiian Islands. Hypoxylon subdisciforme is a discoid to subdiscoid species with plate-like ascus apical ring that does not stain or stains lightly in iodine. Nemania abortiva features asci with 4 or fewer ascospores, the first described Nemania species with consistently fewer...

Five non-native, aggressively growing trees, Falcataria moluccana (Miquel) Barneby & Grimes, Casuarina equisetifolia L. ex J. R. & G. Forst, Eucalyptus grandis Hill ex Maid, Psidium cattleianum Sabine, and Trema orientalis (L.) Blume, were evaluated for suitability as substrate for outdoor cultivation of the oyster mushroom, Pleurotus ostreatus (Ja...

During surveys of the protostelids of the Hawaiian Islands and the South Island of New Zealand, an undescribed species of Protostelium was discovered fruiting on collections of substrates found in several sites on the southern and western parts of the island of Hawaii and from one site near Port Elizabeth, New Zealand. The new species, P. okumu-kum...

During surveys of the protostelids of the Hawaiian Islands and the South Island of New Zealand, an undescribed species of Protostelium was discovered fruiting on collections of substrates found in several sites on the southern and western parts of the island of Hawaii and from one site near Port Elizabeth, New Zealand. The new species, P. okumukumu...

Twenty-nine species belonging to the genera Coprinus and Podaxis (Agaricaceae) and Coprinopsis, Coprinellus, and Parasola (Psathyrellaceae) are reported from the Hawaiian Islands. These species represent a polyphyletic assemblage of dark-spored, saprotrophic taxa comprising the traditional genus Coprinus and the genus Podaxis which is considered a...

Patterns of ecological succession have been demonstrated for decomposer communities, but the details of such patterns with respect to the role of eumycetozoans have not been addressed. Successional patterns can be inferred from a sequence of closely located sites which differ only in age, but are controlled for other sources of variation. Hawai'i,...

Xylaria kaumanae is described as a new species with apparent relationships with X. telfairii and allied taxa. Cultural features and the anamorph from naturally-occurring stromata are described and depicted.

One hundred and sixty genera and 400 species of wood-rotting basidiomycetes are reported from 110 native and exotic substrate species on the Hawaiian Islands of Hawai'i, Kaua'i, Lāna'i, Maui, Moloka'i, and O'ahu. Forty-one (10.25% of the total) fungal species are considered to cause brown rots. This is approximately the same percentage of brown rot...

A survey of higher fungi in the mamane-naio vegetation zone on the slopes of Mauna Kea on the island of Hawai'i yielded 71 species of ascomycetes and basidiomycetes. Eight xylariaceous ascomycetes are reported. Fifteen species of gasteromycetes are reported. Of these Battarrea phalloides, Disciseda anomala, D. verrucosa, Geastrum campestre, G. forn...

Nineteen species belonging to Tribe Agariceae (Agaricaceae) are reported from the Hawaiian Islands. This group, the dark spored members of the Agaricaceae, is represented in the Hawaiian Islands by eighteen species of Agaricus and one species of Melanophyllum. Of these species, all are found only in alien habitats, nine are new, and sixteen are fir...

Four species of Collybia sensu late are reported from the Hawaiian Islands: Rhodocollybia laulaha and Gymnopus menehune represent new species, while G. luxurains and G. subpruinosus are first reports. All four Hawaiian taxa are fully described, illustrated and compared with allied taxa. Marasmius subpruinosus, M. subcyathiformis and Clitocybe colly...

Four species of Collybia sensu lato are reported from the Hawaiian Islands: Rhodocollybia laulaha and Gymnopus menehune represent new species, while G. luxurians and G. subpruinosus are first reports. All four Hawaiian taxa are fully described, illustrated and compared with allied taxa. Marasmius subpruinosus, M. subcyathiformis and Clitocybe colly...

Eleven species of wood-rotting basidiomycetes in the Coniophoraceae are reported from the state of Hawai'i. Coniophora kauaiensis is described as new. Gyrodontium versicolor is reported from the United States for the first time. Seven species are reported on introduced conifers and ten are reported on native or introduced hardwoods. All are confirm...

Seventeen taxa of Hygrophoraceae are reported from the Hawaiian Islands. Of these, six are new species, one a new variety and one a new form of Hygrocybe; two represent new species of Humidicutis; five represent first reports for the Hawaiian Islands; and two taxa are reported but not named because of the lack of sufficient material for accurate ta...

Seventeen taxa of Hygrophoraceae are reported from the Hawaiian Islands. Of these, six are new species, one a new variety and one a new form of Hygrocybe; two represent new species of Humidicutis; five represent first reports for the Hawaiian Islands; and two taxa are reported but not named because of the lack of sufficient material for accurate ta...

Twenty-six fungi are reported from species of the genus Cibotium and other Hawaiian tree ferns. All are basidiomycetes except Ascocoryne sarcoides, Hobsonia gigantea, Lachnella gleicheniae, and Lycogala epidendrum. Senescent petioles of the basal leaves are the main substrate. Five species, Athelia cibotii, Botryobasidium ampullatum, Bourdotia kipu...

Moelleroclavus is considered to be an anamorphic genus. The teleomorph of M. penicilliopsis is shown through field observations, collection examination, and cultures to represent a previously unnamed species of Xylaria, X. moelleroclavus sp. nov. Xylaria lingua and X. scruposa are also discussed.

Three species of brown-spored agarics are described as new: Descolea alienata, Galerina ohiarum, and Pholiota peleae. In addition, six species of Galerina are first reports for the Hawaiian Islands. All species are described and compared with allied taxa, and most are illustrated with line drawings. An artificial dichotomous key to Hawaiian Galerin...

Three species of brown-spored agarics are described as new: Descolea alienata, Galerina ohiarum, and Pholiota peleae. In addition, six species of Galerina are first reports for the Hawaiian Islands. All species are described and compared with allied taxa, and most are illustrated with line drawings. An artificial dichotomous key to Hawaiian Galerin...

A widely distributed Amanita was observed on six of the Hawaiian Islands fruiting in association with Eucalyptus and Casuarina species. Subsequent investigation revealed it to be closely related to A. marmorata subsp. marmorata. The holotype of A. marmorata was studied and found to be badly molded and mostly destroyed. Some anatomical details were...

Hypoxylon rectangulosporum from Guyana is described as new on the basis of its rectangular, ribbed ascospores. Xylaria psidii, an inhabitant of Psidium (guava) seeds in Hawaii is described as new. Podosordaria truncata is shown to be distinct from Stromatoneurospora phoenix on the basis of its smooth ascospores.