| Name | Istvanfy de Csik Madefalva, Gyula von |
| Date of birth | 1860 |
| Date of death | 1930 |
| Remarks | [author note: Herbarium and types: BP] |
| ASA Botanist ID | 164317 botanist |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/c96e5c38-683d-4ef1-8cd7-2c84f35668ac |
| Variant name | Gyula von Istvanfy de Csik Madefalva; Istvanffi; Julius Schaarschmidt until 1886 |
| Author name | Istvanfy |
| B & P Author Abbrev. | Istv. |
| Standard/Label Name | Istvanfy |
| Full Name | Istvanfy de Csik Madefalva, Gyula von |
| Geography Author | Hungary |
| Specialty Author | Algae |
| Specialty Author | Fungi and Lichens |
| Specialty Author | Spermatophytes |
| Citation as Author | Authors of Plant Names. Royal Botanic Gardens, Kew |
| Citation as Author | Taxonomic Literature. Second Edition. Utrecht |