Fungi named in 1944

Leccinum versipelle, also known as Boletus testaceoscaber, dark-stalked bolete, or orange birch bolete, is a common species of mushroom that may be edible when given the right preparation. It is found below birches from July through to November, and turns black when cooked.

Abortiporus biennis, commonly known as the blushing rosette, is a species of fungus belonging to the family Meruliaceae. Synonyms: Boletus biennis Bull. 1790 (= basionym)

Amanita ponderosa, also known as heavy amidella or gurumelo in Spanish, is a mushroom-forming fungus in the family Amanitaceae.

Xanthoconium is a genus of bolete fungi in the family Boletaceae. It was circumscribed by mycologist Rolf Singer in 1944, who included Boletus affinis and what was then known as Gyroporus stramineus as the type species. These two species were part of the "strange group of species described by Murrill and Snell as white-spored Gyropori, and separated by the latter under the new generic name Leucogyroporus." C.B. Wolfe described three species from the United States in 1987: X. chattoogaense, Xanthoconium montaltoense, and X. montanum. As of February 2015, the nomenclatural database Index

Suillus americanus is a species of mushroom-forming fungus in the family Suillaceae. Commonly known as the chicken fat mushroom and the American suillus, it produces bright yellow, often slimy caps marked with red to reddish-brown scales, a pore surface of large yellow angular pores that can stain brownish when bruised, and a slender yellow stipe dotted with darker glandular spots. The species was first described in the late 19th century by the American mycologist Charles Horton Peck and later transferred to Suillus. It closely resembles S. sibiricus, and DNA-based studies have led some

Callistosporium is a genus of fungi in the order Agaricales. Basidiocarps (fruit bodies) are agarics (gilled mushrooms), either with a central stipe (stalk) or pleurotoid (with a lateral stipe). The latter group were formerly referred to Pleurocollybia. Recent molecular research, based on cladistic analysis of DNA sequences, has shown that the genus is a natural, monophyletic grouping, though not all species have yet been sequenced. Species are saprotrophic, typically growing on wood, and the genus is found worldwide.

Amylocystis is a genus of two species of fungi in the family Fomitopsidaceae. The genus was described in 1944 by mycologists Appollinaris Semenovich Bondartsev and Rolf Singer to contain the type, and at that time, sole species, A. lapponicus. A. unicolor was transferred to the genus (from Tyromyces) in 2003. The generic name Amylocystis is derived from the Ancient Greek words άμυλον ("starch") and χύστιζ ("bladder").

Boletochaete is a genus of fungi in the family Boletaceae. The genus contains three species found in Africa and southeast Asia. American mycologist Rolf Singer circumscribed the genus in 1944.

Amylocystis lapponica (alternatively spelled Amylocystis lapponicus) is a species of bracket fungus in the family Fomitopsidaceae, and the type species of genus Amylocystis. It produces medium-sized, annual fruit bodies that are soft, and have a strong, distinct smell. The fungus is a saprophyte that feeds on coniferous wood of logs lying on the ground, and causes brown rot. It is a rather rare species that only occurs in old-growth forest.

Xanthoconium affine is a species of bolete fungus of the genus Xanthoconium. First described as a species of Boletus by Charles Horton Peck in 1873, it was placed in its current genus by Rolf Singer in 1944. The convex cap is 3.5–9 centimetres (1+1⁄2–3+1⁄2 in) wide and brownish. The pores are whitish, darkening with age. The stem is 3.5–9 cm tall and 1–2 cm thick. The flesh is white with a mild scent. The spore print is yellowish brown. It may resemble X. purpureum, Boletus separans, and Tylopilus felleus. It can be found under oak and beech trees in eastern North America from June to

Nothopanus is a genus of fungus in the family Marasmiaceae. The genus was circumscribed by American mycologist Rolf Singer in 1944.

Xerocomellus zelleri, commonly known as Zeller's bolete, is a species of fungus in the family Boletaceae. First described scientifically by American mycologist William Alphonso Murrill in 1912, it has been juggled by various authors to several genera, including Boletus, Boletellus, and Xerocomus. The fruit bodies are distinguished by their dark reddish brown to nearly black caps with uneven surfaces, the yellow pores on the underside of the caps, and the red-streaked yellow stems. The development of the fruit bodies is gymnocarpic, meaning that the hymenium appears and develops to maturity in

Smithiomyces is a genus of fungi in the family Agaricaceae. It was circumscribed by Rolf Singer in 1944. The type species, S. mexicanus, was formerly placed in Amanita, as well as the now obsolete genera Leucomyces and Venenarius. The genus was named to honor American mycologist Alexander H. Smith.

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Alternaria dauci is a plant pathogen. The English name of the disease it incites is "carrot leaf blight".

Xanthoconium stramineum is a species of bolete fungus and the type species of the genus Xanthoconium. First described as a species of Gyroporus by William Alphonso Murrill in 1940, it was placed in its current genus by Rolf Singer in 1944.

Tylopilus tabacinus is a species of bolete fungus in the family Boletaceae. It is characterized by a tawny-brown cap measuring up to 17.5 cm (6.9 in) in diameter, and a reticulated stem up to 16.5 cm (6.5 in) long by 6 cm (2.4 in) thick. A characteristic microscopic feature is the distinctive crystalline substance encrusted on the hyphae on the surface of the cap. The species is known from the eastern United States from Florida north to Rhode Island, and west to Mississippi, and from eastern Mexico. It is a mycorrhizal species, and associates with oak and beech trees.

Phaeocollybia festiva is a species of fungus in the family Cortinariaceae.

Haploporus is a genus of poroid fungi in the family Polyporaceae.

Callistosporium palmarum is a species of fungus in the family Callistosporiaceae, and the type species of the genus Callistosporium. Originally named Gymnopus palmarum by William Alphonso Murrill in 1939, the species was transferred to the genus Callistosporium by Rolf Singer in 1944.

Byssocorticium is a genus of corticioid fungi in the family Atheliaceae. The widespread genus contains 9 species.

Brasiliomyces is a genus of fungi in the family Erysiphaceae. The widely distributed genus contains seven species.

Aspergillus granulosus is a species of fungus in the genus Aspergillus. It is from the Usti section. The species was first described in 1944. It has been reported to produce asperugins, ustic acids, nidulol, and drimans.

Aspergillus caespitosus is a species of fungus in the genus Aspergillus. It was described scientifically in 1944 by Kenneth B. Raper and Charles Thom, who isolated it from soil. It is from the Nidulantes section.

Amyloporia is a genus of five species of crust fungi in the family Polyporaceae. Its main distinguishing characteristic is the amyloid reaction of the skeletal hyphae, although some authors do not consider this to be sufficient to distinguish Amyloporia from the related genus Antrodia.

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Suillus subluteus is a species of mushroom in the genus Suillus. First described as Boletus subluteus by Charles Horton Peck in 1887, it was transferred to Suillus by Wally Snell in 1944. It is found in North America.

Pyrrhoglossum is a genus of fungus in the family Cortinariaceae. The genus is widely distributed, especially in tropical regions, and contains 11 species. It was circumscribed by American mycologist Rolf Singer in 1944.

Lecanora impudens is a species of crustose lichen in the family Lecanoraceae. It was described as new to science by Gunnar Degelius in 1944. Lecanora impudens is a known host species to lichenicolous fungi, including Carbonea aggregantula and Dactylospora homoclinella.

Halosphaeria is a genus of fungi in the family Halosphaeriaceae. The genus contains four species.