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One of the ways to differentiate and identify roses is by their bloom type. Rose blooms can have different forms, which can be summarized as follows: single bloom, semi-double bloom, double bloom and quartered bloom.
Single bloom:
a single circlet of five petals
Rosa rubrifolia
Different types of Roses
(by bloom type)
Semi-double bloom:
a rose that opens more losely than a double and with 6 to 15 petals
Rosa Floribunda Sarabanda with 6 to 9 petals
Double bloom:
a rose with 15 or more petals (any multiple of five)
Quartered bloom:
Many petals that form a flat bloom, which seems to be divided into four sections or quarters.