Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Marasmiaceae
Genus: Gymnopus

http://calphotos.berkeley.edu/...

widely distributed

Gymnopus species

unknown

http://www.speciesfungorum.org/...

http://www.mycobank.org/MycoTaxo.aspx?Link=T&Rec=437615

Current Name:
Gymnopus aquosus (Bull.) Antonín & Noordel., in Antonín, Halling & Noordeloos, Mycotaxon 63: 363 (1997)

Synonymy:
Agaricus aquosus Bull., Herb. Fr. 1: tab. 17 (1781) [1780-81]
Collybia aquosa (Bull.) P. Kumm., Führ. Pilzk. (Zwickau): 114 (1871)
Collybia aquosa (Bull.) P. Kumm., Führ. Pilzk. (Zwickau): 114 (1871) var. aquosa
Collybia dryophila var. aquosa (Bull.) Quél., Enchir. fung. (Paris): 31 (1886)
Collybia dryophila var. oedipus Quél., Fl. mycol. France (Paris): 226 (1888)
Marasmius dryophilus var. aquosus (Bull.) Rea, Brit. basidiomyc. (Cambridge): 337 (1922)
Marasmius dryophilus var. oedipus (Quél.) Rea, Brit. basidiomyc. (Cambridge): 525 (1922)

Bibliography: Antonín, V.; Halling, R.E.; Noordeloos, M.E., 1997, Mycotaxon 63: 363 (more info)

Year of publication: 1997
Status of the name: combination; legitimate
Sanctioned by: Fries, SM1:125 (Agaricus aquosus Bull. 1781)
MycoBank’s opinion: currently used
Classification: Fungi, Basidiomycota, Agaricomycotina, Agaricomycetes, Agaricomycetidae, Agaricales, Marasmiaceae, Gymnopus
Basionym: Agaricus melleus Schaeff. 1774 [UNA; MB494735]
Obligate synonym(s): Collybia aquosa (Bull.) P. Kumm. 1871 [LEG; MB171695]
Collybia dryophila var. aquosa (Bull.) Quél. 1886 [LEG; MB358803]
Collybia dryophila var. aquosa (Bull.) Raithelh. 1974 [ILL; MB352705]
Collybia dryophila var. aquosa (Bull.) Bon & Courtec. 1987 [ILL; MB132867]
Agaricus aquosus Bull. 1781 [LEG; MB172756]
Marasmius dryophilus var. aquosus (Bull.) Rea 1922 [LEG; MB438651]
Agaricus flavens Batsch 1783 [ILL; MB495363]
Collybia succinea Quél. 1872 [ILL; MB229050]
Agaricus succineus Fr. 1838 [ILL; MB455968]