| Name | Rydberg, Per Axel |
| Date of birth | 1860 |
| Date of death | 1931 |
| Remarks | [author note: Herbarium and types: NY (35,000); additional specimens at A, B (mostly destroyed), BUF, C, CS, E, GH, HBG, K, KANU, KSC, L, LE, MIN, MO, MONT, MONTU, NEB, NMC, NY, NYS, RM, US] |
| ASA Botanist ID | 100149 botanist |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/40fbe1c6-1ce4-4636-9c11-35b1a071356b |
| Variant name | Per Axel Rydberg |
| Author name | Rydberg |
| B & P Author Abbrev. | Rydb. |
| Standard/Label Name | P. A. Rydberg |
| Full Name | Rydberg, Per Axel |
| Geography Author | Sweden, United States of America |
| Specialty Author | Fungi and Lichens |
| Specialty Author | Pteridophytes |
| Specialty Author | Spermatophytes |
| Citation as Author | Authors of Plant Names. Royal Botanic Gardens, Kew |
| Citation as Author | Taxonomic Literature. Second Edition. Utrecht |
| Member of teams/groups | |
| Author in | Fl. Rocky Mts., ed. 2 |
| Author in | Fl. Colorado [Rydberg] |
| Author in | Fl. Plains N. Amer. |
| Author in | Fl. Rocky Mts. |
| Author in | Fl. Nebr., Rosales |
| Holdings | Search for specimens collected by P. A. Rydberg |
| Collections in | [no date] (4), 1890 (2), 1891 (19), 1892 (129), 1893 (180), 1897 (4), 1905 (26), 1911 (1), 1913 (11), 1925 (24) |
| Collector Teams: | Fernald & Rydberg Rydberg & Britton C. O. Rosendahl & P. A. Rydberg P. A. Rydberg & C. O. Rosendahl Driggs & Rydberg P. A. Rydberg & C. E. Bessey Small & Rydberg J. G. Smith & P. A. Rydberg |
| Author Teams: | Fernald & Rydberg Rydberg & Britton Rosendahl & Rydberg Wooton & Rydb. Small & Rydb. J. G. Smith & Rydberg |