The Official Registry and Checklist - Rosa is an official
publication of the International Cultivar Registration Authority -
Rosa, and it conforms to the standards set forth by the
International Society for Horticultural Sciences, as documented in
the International Code of Nomenclature for Cultivated Plants. This
reference guide seeks to identify all cultivars of the genus Rosa,
including those not registered, no longer in cultivation or
extinct. Entries for more than 33,000 unique cultivars include all
known synonyms for a given cultivar along with a detailed
description of its growing habits and history. Rose enthusiasts
worldwide will enjoy a vast wealth of knowledge at their fingertips
with this most up-to-date registry.
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