Which of the following descriptions fits best?

 

Saxifraga oppositifolia type

polar view: tricolpate (wide colpi).
Equatorial view: length-wise striate, oval pollen grain

tricolpate; striate, small, elongated pollen grain

polar view: tricolporate; thick exine, thinner towards colpi; columellae distinct.
Equatorial view: psilate to scabrate

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