Which of the following descriptions fits best?
Rosaceae; e.g. Prunus padus, REM: Crataegus monogyna
tricolporate, striate; pori often with operculum tetrad; tricolpate or tricolporate; psilate, scabrate or verrucate six colpi; polar view: "flower"; psilate, very small pollen grain
tetrad; tricolpate or tricolporate; psilate, scabrate or verrucate
six colpi; polar view: "flower"; psilate, very small pollen grain
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