Created: 2008-01-05 03:32:06
By: (CureCat)
Summary: .

The size difference is all to a degree of course. Generally speaking, S. ambigua is larger than S. riparia, however, during wet season I have seen some abnormally humongous S. riparia, and when especially dry I have seen really small S. ambigua. But once you’ve seen enough populations of both species, you’ll recognize the variable distinctions.

Are their any less qualitative characters? Like micro differences?

From MushroomExpert:

S. ambigua
Microscopic Features: Spores 11-14×6-7.5 µ; smooth; elliptical; with a germ pore. Chrysocystidia present.

S. riparia
Microscopic Features: Spores 11-15×6-8 µ; smooth; elliptical to subfusoid. Chrysocystidia absent. Cheilocystidia abundant; clavate to cylindric; flexuous.

Created: 2008-01-04 22:17:20
By: Joshua Birkebak (Shua)
Summary: ???

I am not at all convinced… I must say I have never collected S. riparia up here… I am not even sure it grows up here bu I have looked at many pictures (especially those on here…) and mine look nothing really like those… These stropharias were big and ambigua like… But since I don’t have any experience with this species I don’t want to jump to any conclusions…. Are their any less qualitative characters? Like micro differences?

Created: 2008-01-04 12:09:28
By: (Alan Rockefeller)
Summary: yea

I think she has a point there.

Created: 2008-01-03 16:19:04
By: (CureCat)
Summary: .

S. riparia has a stipe which is thinner, more yellow to cream colour, and more twisted.
http://mushroomexpert.com/stropharia_riparia.html

S. ambigua is larger, and has a stipe which is thick, white, and straight.
http://www.mykoweb.com/CAF/species/Stropharia_ambigua.html

Created: 2008-01-03 15:34:26
By: Joshua Birkebak (Shua)
Summary: riparia?

What would lead you to call this riparia? I will say that I havn’t thought of that species… The large ohnje in the picture is about 12cm broad… Another thing is that these specimens are atleast a week old and thus lost any veil remnants…

Created: 2008-01-01 19:51:36
By: (CureCat)
Summary: .

Actually, that is S. riparia.

S. ambigua is larger, with a thicker and straighter stipe.