Linked from
The 8 pages that link to Floral formula, each with the reason it gives.
PerianthRelated: Floral formulas record whether a perianth has distinct whorls or tepals.
CorollaRelated: Its symbols record petal number and whether the corolla is fused.
StamenRelated: Its symbols record stamen number and whether stamens are fused or free.
FloretRelated: Floret structure can be recorded and compared using floral characters.
SepalRelated: Its symbols can record sepal number and whether sepals are fused.
GynoeciumRelated: Its symbols record carpel number and whether the gynoecium is fused.