| Name | Hahn, William James | 
| First date flourished | 1980 | 
| Last date flourished | 1996 | 
| Remarks | [author note: at WIS in 1993; Arecaceae] [collector note: G, LL, MBM, MO, NY, PY, US] Example of Names Published: Ilex tectonica W.J.Hahn in Ann. Missouri Bot. Gard., 75(2): 733 (1988); Acrocomia hassleri (Barb.Rodr.) W.J. Hahn, Principes 35(3): 170 (1991). | 
| ASA Botanist ID | 125360 botanist | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/eb1d57b2-136f-4288-8397-d228c12eadc3 | 
| Variant name | William James Hahn | 
| Variant name | Hahn, William | 
| Author name | W. J. Hahn | 
| B & P Author Abbrev. | W.J.Hahn | 
| Standard/Label Name | W. J. Hahn | 
| Full Name | Hahn, William James | 
| Geography Collector | Mexico,  Paraguay | 
| Specialty Author | Spermatophytes | 
| Specialty Collector | Phanerogams | 
| Citation as Collector | Phytologia; Designed to Expedite Botanical Publication. New York | 
| Citation as Collector | Annals of the Missouri Botanical Garden | 
| Citation as Author | Authors of Plant Names. Royal Botanic Gardens, Kew | 
| Member of teams/groups |  | 
| Holdings | Search for specimens collected by W. J. Hahn | 
| Collections in | 1983 (1),  1985 (3),  1988 (1),  1989 (1) | 
| Collector Teams: | J. Fernández Casas, W. J. Hahn & A. Schinini  W. Hahn, E. J. Judziewicz & D. Gopaul  W. J. Hahn & J. C. Sandino |