I was being told repeatedly by my botany teachers at college that it is impossible to get longitudinal section of ovule of any flower. One has to make use of a microtome to get a section. However while trying to take the transverse section, I saw something incredible. That two of the ovules had been chopped into perfect halves. Immediately I put the section into a foldscope and observed.
I had accidently ended up with a longitudinal section of ovule using just a shaving blade. Ovule was still attached to the placenta 😛
This looked quite like an orthotropous ovule.