sterility of Viburnum opulus 'Roseum' (Snowball Tree)?
Viburnum opulus 'Roseum' produces an inflorescence composed of a ball of
sterile (asexual) flowers, rather than a flattened inflorescence with
sterile flowers flanking fertile ones. Is this cultivar absolutely
sterile, or does it produce the occasional fruit?
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Stewart Robert Hinsley
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