French botanist and mycologist (1828–1892).
Casimir Roumeguère (15 August 1828 in Toulouse – 29 February 1892 in Toulouse) was a French botanist and mycologist. He served as director of the journal Revue mycologique. His collections of fungi are included in several exsiccatae, including "Fungi (selecti) Gallici exsiccati" and "Fungi selecti exsiccati" with publications. His collection of algae is part of the exsiccatae series: "Algues de France", which he co-edited since 1883. In addition to his botanical and mycological research, he published a few works in the fields of geology, conchology and archaeology.