[SAPHO. New plant obtention: from the idea to the catalogue [Syndicat d'Amelioration des Plantes Horticoles Ornementales (France)]]

chamaecyparis cold cupressaceae cupressus disease resistance fitomejoramiento forsythia france francia frio froid hibiscus histoire historia history ilex malus ornamental plants plant breeding plantas ornamentales plante ornementale pyracantha resistencia a la enfermedad resistencia a la temperatura sindicatos syndicat temperature resistance thuja trade unions ulmus variedades varieties weigelia