| Entry | Volume | Pages |
|---|---|---|
| Schwarz, Dr. Prof. O. (Otto): A Bellflower and Snails | 41 | 122 |
| Schwarz, Dr. Prof. O. (Otto): A Chinese Squatting on the Roof | 33 | 65 |
| Schwarz, Dr. Prof. O. (Otto): A New Hybrid Gesneriad for the Rock Garden - x Gomiocharis calliantha | 45 | 49 |
| Schwarz, Dr. Prof. O. (Otto): Plant Portraits: Globularia spinosa | 40 | 54 |
| Schwarz, Dr. Prof. O. (Otto): Plant Portraits: Primula algida | 43 | 63 |
| Schwarz, Dr. Prof. O. (Otto): Plant Portraits: Primula cordifolia | 43 | 102 |
| Schwarz, Dr. Prof. O. (Otto): Primulas on the Edge of the Desert | 32 | 283 |
| Schwarz, Dr. Prof. O. (Otto): Some Primulas of the Caucasus and Surrounding Area | 38 | 375 |
| Schwarz, Dr. Prof. O. (Otto): Tentative Key to the Wild Species of Galanthus | 31 | 131 |
| Schwarz, Dr. Prof. O. (Otto): The Alpine House at Jena | 42 | 187, 264 |
| Schwarz, Dr. Prof. O. (Otto): The Alpine House at Jena | 43 | 37 |
| Schwarz, Dr. Prof. O. (Otto): The Genus Globularia | 35 | 305 |