Which of the following descriptions fits best?
Asteraceae: Asteroideae; e.g. Achillea type
tetrad; tricolpate or tricolporate; psilate, scabrate or verrucate fenestrate, echinate tricolporate; echinate (spikes wide and conical)
fenestrate, echinate
tricolporate; echinate (spikes wide and conical)
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