Crataegus oxyacantha auct. balcan., Rosaceae: See Crataegus x polyacantha Jan.
Crataegus oxyacantha auct., non L., Rosaceae: See Crataegus laevigata (Poir.) DC.
Crataegus oxyacantha L., nom. ambig., Rosaceae: See Crataegus rhipidophylla Gand.
Crataegus oxyacantha auct. balcan., Rosaceae: See Crataegus x polyacantha Jan.
Crataegus oxyacantha auct., non L., Rosaceae: See Crataegus laevigata (Poir.) DC.
Crataegus oxyacantha L., nom. ambig., Rosaceae: See Crataegus rhipidophylla Gand.
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Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.