| Entry | Volume | Pages |
|---|---|---|
| Ingwersen W. (Walter) E.Th.: A War-time Plant Hunt in Kashmir | 11 | 14 |
| Ingwersen W. (Walter) E.Th.: Alpine and Arctic Willows | 2 | 63 |
| Ingwersen W. (Walter) E.Th.: Constructing the Scree Garden | 2 | 153 |
| Ingwersen W. (Walter) E.Th.: Cotyledon spinosa | 5 | 271 |
| Ingwersen W. (Walter) E.Th.: Daphne oleoides | 12 | 203 |
| Ingwersen W. (Walter) E.Th.: Genus Oxalis in the Rock Garden | 3 | 81 |
| Ingwersen W. (Walter) E.Th.: Ingleborough and Farrer's Country | 2 | 228 |
| Ingwersen W. (Walter) E.Th.: Kabschia Saxifrages (resume) | 7 | 279 |
| Ingwersen W. (Walter) E.Th.: Notes on Bulgarian Plants | 4 | 191 |
| Ingwersen W. (Walter) E.Th.: Plant Hunting in the Pirin Mountains of Bulgaria | 10 | 112 |
| Ingwersen W. (Walter) E.Th.: Primula carniolica | 2 | 300 |
| Ingwersen W. (Walter) E.Th.: Reginald Farrer and his Influence on Present Day Rock Gardening | 1 | 209 |
| Ingwersen W. (Walter) E.Th.: Sempervivum persicum? | 18 | 180 |
| Ingwersen W. (Walter) E.Th.: The Cliff House | 13 | 1 |
| Ingwersen W. (Walter) E.Th.: The Fascination of Stone Trough and Sink Gardens | 2 | 29 |