Posted: 27/09/2013 at 11:31
Its a lot easier than you think. For instance alba means white. Flore plena means a double flower or flower with plenty of petals. So anything described as flore plena alba will have double white flowers.
Its the same with describing genus, species, cultivar.
Understanding that species within a genus will have a lot of common characteristics, means that it is easier to start identifying things by giving a head start when you know which genus you are looking for.
Most people can identify a rose. If it is (usually)single and comes true from seed it is a species. The hybrid teas and most of the roses we grow in a garden are cultivars and will not come true from seed.