[2]Philadelphoideae Burnett[1] Hydrangeoideae is a subfamily of the hydrangea family (Hydrangeaceae).

[3] The subfamily was described by Gilbert Thomas Burnett in 1835.

[1] Pollen grains from species within the subfamily are often subprolate to subspherical.

[4] The leaf venation is largely camptodromous.

This article about plants of the order Cornales is a stub.