| Name | Hasslow, Olof Johnsson |
| Date of birth | 1871 |
| Date of death | 1952 |
| Remarks | [collector note: 1898-1942: A, GB] |
| ASA Botanist ID | 105557 botanist |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/dd111dca-92fa-400b-83b9-32a8454479cb |
| Variant name | Olof Johnsson Hasslow |
| Author name | Hasslow |
| B & P Author Abbrev. | Hasslow |
| Standard/Label Name | O. J. Hasslow |
| Full Name | Hasslow, Olof Johnsson |
| Geography Collector | Sweden |
| Specialty Author | Algae |
| Specialty Collector | Bryophytes |
| Specialty Collector | Phanerogams |
| Citation as Author | Authors of Plant Names. Royal Botanic Gardens, Kew |
| Citation as Collector | Index Herbariorum - Collectors E-H |
| Holdings | Search for specimens collected by O. J. Hasslow |
| Collections in | 1902 (2), 1923 (1), 1931 (1), 1934 (2) |