Exidia crenata is a species of fungus in the family Auriculariaceae. It has the English name of amber jelly roll. Basidiocarps (fruit bodies) are gelatinous, brown to orange-brown, and turbinate (top-shaped). It typically grows on dead attached twigs and branches of broadleaved trees and is found in North America.

Exidia crenata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Auriculariales
Family: Auriculariaceae
Genus: Exidia
Species:
E. crenata
Binomial name
Exidia crenata
(Schwein.) Fr. (1822)
Synonyms

Tremella crenata Schwein. (1822)

Taxonomy

edit

The species was originally described from North Carolina in 1822 by German-American mycologist Lewis David de Schweinitz as Tremella crenata. It was transferred to the genus Exidia by Fries in the same year. Exidia crenata was widely considered a synonym of the European Exidia recisa[1] until molecular research, based on cladistic analysis of DNA sequences, showed that the American species is distinct.[2]

Description

edit

The gelatinous fruit bodies are amber, 8–25 millimetres (38–1 inch) wide, and 4–12 mm (31612 in) thick. They can be translucent and tend to be moist and/or glossy. The spore print is white.[3]

Similar species

edit

Similar species include E. recisa and members of Auricularia and Phaeotremella.[3]

Habitat and distribution

edit

Exidia crenata is a wood-rotting species, typically found on dead attached twigs and branches of broadleaf trees, particularly oak.[1] It is widely distributed in eastern North America, where it can be found from September through May, thriving in winter.[3]

References

edit
  1. ^ a b Coker WC (1920). "Notes on the lower basidiomycetes of North Carolina". Journal of the Elisha Mitchell Scientific Society. 35: 113–182.
  2. ^ Wu F, Zhao Q, Yang ZL, Ye SY, Rivoire B, Dai YC (2020). "Exidia yadongensis, a new edible species from East Asia". Mycosystema. 39: 1203–1214. doi:10.13346/j.mycosystema.200205.
  3. ^ a b c Audubon (2023). Mushrooms of North America. Knopf. p. 110. ISBN 978-0-593-31998-7.