Phylum: Ascomycota	Class: Leotiomycetes
Order: Helotiales	Family: Tricladiaceae
Species: Cudoniella clavus var. clavus (Alb. & Schwein.) Dennis

Synonyms:

Cudoniella clavus Helotium aquaticum Helotium clavus Hymenoscyphus aquaticus Ombrophila clavus Peziza clavus

Common Name:

Spring Pin

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This distribution map was produced using DMap

Photographer: © David Mitchel

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View this species in its UK context on the NBN Atlas

Associated Species (where recorded) & number of records: Alnus glutinosa (6) Quercus (4) Acer pseudoplatanus (2) Larix decidua (1) Calluna vulgaris (1) Alnus incana (1) Acer platanoides (1) Abies procera (1) Acer campestre (1) Alnus (1)

Habitat (where recorded) & number of records: Woodland and scrub (8) Woodland: mixed, plantation (3) Wet valley alderwoods (2) Woodland: broadleaved, plantation (2) Woodland: broadleaved, semi-natural (2) Woodland: coniferous, plantation (2) Woodland: mixed (2) Woodland (1) Woodland: mixed, semi-natural, high forest (1)

Substrate (where recorded) & number of records: Twig (8) Branch (4) Log (2) Rotting Wood (2) Decorticated Wood (1) Fallen Twig (1) Leaf (1) Soil (1) Stump (1) Wood (1)

Months recorded in & number of records: January (1) March (5) May (7) June (4) July (2) August (1) September (2) October (5) November (1)