2010.05.21 Austria, Vienna XXII. district (Lobau wet meadow, temporarily flooded, 153 m AMSL).Not very common, and usually not fruiting so early in the year - fruiting season should only begin in june (and last till fall).In the same habitat Hieracium is to be found (Hieracium pilosella agg. = Hieracium sect. pilosella is my guess; the oval leaves with hair are of this species): so the meadow is dry enough for Hieracium, and also for Orchis militaris which grows nearby, while it is not wet enough for Epipactis palustris (which is to be found a good five meters water-wards of this place).German name: Spitzgebuckelter SaftlingID discussed on
naturbeobachtung_at (in German) where finally Thomas Bardorf confirmed identification (many thanks ;-).He also mentioned (and I am here paraphrasing Thomas Bardorf) that for this species two synonyms exist:
H. persistens (nomenclatural author Britzelmayr 1890), which however is not accepted as valid species description by some mycologists - thus the second name,
H. acutoconica (nomenclatural author Clements 1893): and while usually the older description takes precedence, in this case many use the younger one.As
treegrow pointed out,
Index fungorum lists
Hygrocybe persistens as currently accepted name, which is why I'm tagging this one with this name only.Anyway, this species is very similar to
H. conica which we could rule out due to the fact that they didn't turn black (even after some specimens spent a whole day in a plastic box).