aprile
Early fruiting period
aprilis
Of or pertaining to the month of April
aquifluus
Water, fluid (clear latex)
aquosa
Very watery (viscid cap)
Arachnion
Small spider web
Arachnopeziza
Spider Peziza
araiospora
Thin spore
Araneosa, araneosum
Full of spiders webs
arbustivus
Pertaining to plantations
arbuticola
Arbutus-dwelling (Arbutus menziesii=mandrone)
arcangeliana
Pertaining to Arcangel
Arcangeliella
Diminutive of Arcangel
archeri
William Archer (1830-1897), Irish natural scientist
arctostaphylos
Growing with Arctostaphylos uva-ursi
arcuata
Curved
arcularius
Pertaining to a casket
Arcyria
Pertaining to a net (capillitium a loose network of threads)
ardosiacum
Pertaining to water
arduennensis
The Arduenn region (around Ardenne in Belgium)
aremoricus
Pertaining to northern Gaul
arenaria, arenarium, arenarius
Pertaining to sand
arenatus
Sandy
arenicola
Sand dweller
areolatum, areolatus
Divided into small patches, areolate, cracked
areus
Mistake for "aereus"
argentatus
Silver plated
argenteum, argenteus
Silvery
argentinus
Somewhat silvery
argillacea, argillaceus
Clay colored
argillaceifolius
Clay colored (dingy yellowish-brown) gills
argillaceifolius var. megacarpus
Clay colored gills; large fruiting body
argutus
Sharp
argyraceum, argyraceus
Silver colored
arhizus
Without roots
ari-triphylli
From host Arisaema triphyllum (Jack-in-the-Pulpit)
arizonicum
Arizona
arkansana
Arkansas
armeniaca, armeniacum, armeniacus
Apricot colored
Armillaria
Pertaining to a ring
Armillariella
Diminutive of Armillaria