Gymnopus floridanus Murrill, Bull. Torrey Bot.

Honan, Amy H., Desjardin, Dennis E., Perry, Brian A., Horak, Egon & Baroni, Timothy J., 2015, Towards a better understanding of Tetrapyrgos (Basidiomycota, Agaricales): new species, type studies, and phylogenetic inferences, Phytotaxa 231 (2), pp. 101-132 : 127-128

publication ID

https://doi.org/ 10.11646/phytotaxa.231.2.1

persistent identifier

https://treatment.plazi.org/id/5C2387A2-FFDB-FFFC-FF44-F8C3FE6BFD2E

treatment provided by

Felipe

scientific name

Gymnopus floridanus Murrill, Bull. Torrey Bot.
status

 

Gymnopus floridanus Murrill, Bull. Torrey Bot. View in CoL Club 66: 158. 1939. Fig. 10d–g View FIGURE 10

Accepted as a synonym of Tetrapyrgos nigripes by Singer (1973) and Horak (1983).

Holotype:— UNITED STATES. Florida: Kelley’s Hammock, 10 miles northwest of Gainesville, on log of sweet gum ( Liquidambar styraciflua , Altingiaceae ), 3 August 1938, leg. West & Murrill ( FLAS F-18290!).

The holotype specimen consists of numerous basidiomes in fair condition. Description of dried holotype: Pileus convex with a central papilla, translucent-striate. Lamellae adnate to subdecurrent, distant, very narrow. Stipe silky, broad, non-insititious, with a distinct ring of basal white mycelium. Lignicolous. Basidiospores not observed; material immature; protologue indicates spores not found. Basidia not observed. Basidioles cylindrical to clavate. Pleurocystidia absent. Cheilocystidia scattered, 22–32 × 3–5 μm, narrowly clavate to cylindrical with an inflated apex, smooth, hyaline, inamyloid, thin-walled. Pileipellis a cutis of radially arranged, non-diverticulate hyphae, 2.5–8 μm diam.; terminal cells suberect to erect, cylindrical to clavate, smooth, sometimes geniculate, abundant over pileus disc and scattered elsewhere; all cells hyaline, inamyloid, subgelatinous, with walls up to 0.5 μm thick. Tramal hyphae interwoven, subgelatinous, similar to pileipellis hyphae with interspersed highly refractive, cylindrical to contorted oleiferous hyphae. Stipe tissue monomitic; cortical and medullary hyphae similar, subparallel, 2.5–6.5 μm diam., cylindrical, smooth, hyaline, inamyloid, thin-walled; with scattered oleiferous hyphae. Stipitipellis of numerous, clustered caulocystidia, irregularly clavate, smooth (lacking diverticula), hyaline, thin-walled. Clamp connections present.

Status: This taxon is of uncertain taxonomic position, but is certainly not a species of Tetrapyrgos . The material is immature, lacks basidiospores, and has non-diverticulate cheilocystidia, pileipellis and stipitipellis hyphae, excluding Tetrapyrgos from consideration.

FLAS

Florida Museum of Natural History, Herbarium

Kingdom

Fungi

Phylum

Basidiomycota

Class

Agaricomycetes

Order

Agaricales

Family

Omphalotaceae

Genus

Gymnopus

Kingdom

Fungi

Phylum

Basidiomycota

Class

Agaricomycetes

Order

Agaricales

Family

Marasmiaceae

Genus

Tetrapyrgos

Loc

Gymnopus floridanus Murrill, Bull. Torrey Bot.

Honan, Amy H., Desjardin, Dennis E., Perry, Brian A., Horak, Egon & Baroni, Timothy J. 2015
2015
Loc

Gymnopus floridanus

Murrill 1939: 158
1939
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