Which of the following descriptions fits best?
Monolete spores; e.g. Polypodium, Athyrium; Fig.: Athyrium filix-femina
monoporate, pore with clearly defined annulus; psilate elongated pollen grain > 40 µm single elongated aperture; corrugated to smooth surface ("tangerine segment") tricolporate, psilate small pollen grain that is longer than it is wide (< 20µm)
monoporate, pore with clearly defined annulus; psilate elongated pollen grain > 40 µm
single elongated aperture; corrugated to smooth surface ("tangerine segment")
tricolporate, psilate small pollen grain that is longer than it is wide (< 20µm)
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