[Leif]

I've just been examining some spores under the microscope, and they are different from yours. In your case, there are oil droplets massed towards the ends. In my case the contents (oil drops?) are more evenly distributed. However the shape is about the same, i.e. ellipsoidal with a mix of rounded and blunt ends. The hairs or surface hyphae on the underside are curly, and one long one was helical. This seems to be the key feature of S. austriaca, so my guess was correct.