GROWTH AND BLOOM FORMS

Hybrid teas are bred to produce one showy rose per stem.
Floribundas are low-growing bushes that bloom in sprays of small, usually decorative, blossoms.
Grandifloras are similar to floribundas, with sprays of blooms, but their blossoms are formed like hybrid teas.
Miniature roses are diminutive versions of other rose forms.  Minis grow on their roots, so they have no bud unions.
Climbers are distinguished by the way their bushes grow; they’re hybridized to sprawl, but must be trained to ramble where you want them.
Standards, or tree roses, are bushes that bloom atop a length of rosewood that has no growth along its sides.