On Hydrangea peruviana, an endangered species from Ecuador, and Hydrangea oerstedii, very common in Costa Rica and Panama, and seven threatened Central and South American Hydrangeas, which have been confounded with these

Hydrangea weberbaueri A apical portion of a branch with young leaves where the characteristic leaf venation and margin can be observed B adaxial leaf side showing the typical leaf venation of this species C glabrous apex of the inflorescence axis of a functionally female inflorescence. A field image of collection Granados Mendoza et al. 2012-23 B field image of collection Samain et al. 2011-056 C field image of collection Samain et al. 2011-068.