was an amateur collector of botanical specimens, fossils and shells in south-east Queensland and northern New South Wales. About 2120 herbarium specimens can be attributed to J.H.Simmonds, although both his wife Rose Simmonds {nee Culpin) and their eldest son John Howard (Jack) Simmonds Jnr. ) also collected botanical specimens under this designation. About 15 collections of botanical specimens by the Simmondses are designated as type materials, and about four fossil specimens collected by J.H. Simmonds Snr also represent type materials. Family members were eponymously commemorated in the names of 10 taxa of plants, liverworts, fungi and fossils.