This list can be split into 3 main categories
COMMON - Species 1-10, all having 50+ occurrences. You have likely run into these already.
UNCOMMON - Species 11-24, all having 15+ occurrences. You may have seen these already.
RARE - Species 25 and below, all having 14 or less occurrences. You likely have never seen these.
Dracaena fragrans (~1,000 occurrences)
Dracaena reflexa (~675 occurrences)
Dracaena aletriformis (~650 occurrences)
Dracaena draco (~460 occurrences)
Dracaena angustifolia (~150 occurrences)
Dracaena cochinchinensis (~95 occurrences)
Dracaena steudneri (~90 occurrences)
2-way tie:
Dracaena sanderiana (~85 occurrences)
Dracaena xiphophylla (~85 occurrences)
Dracaena surculosa (~70 occurrences)
Dracaena cinnabari (50 occurrences)
Dracaena aurea (47)
Dracaena serrulata (42)
Dracaena americana (39)
Dracaena cambodiana (34)
Dracaena aubryana (33)
Dracaena floribunda (32)
2-way tie:
Dracaena fontanesiana (29)
Dracaena porteri (29)
Dracaena multiflora (21)
Dracaena usambarensis (20)
Dracaena forbesii (19)
2-way tie:
Dracaena afromontana (18)
Dracaena ombet (18)
Dracaena elliptica (17)
Dracaena concinna (16)
Dracaena ellenbeckiana (15)