| Entry | Volume | Pages |
|---|---|---|
| Hilton, E.: A Cotswold Garden | 44 | 247 |
| Hilton, E.: A Report on the 1975 Seed Distribution | 44 | 120 |
| Hilton, E.: A Rock Wall | 46 | 104 |
| Hilton, E.: Greek Plants in the Garden | 47 | 297 |
| Hilton, E.: Searching for Flowers in the Western States | 48 | 146, 241, 332 |
| Hilton, E.: Searching for Flowers in the Western States | 49 | 62 |
| Hilton, E.: Some Austrian Mountains | 51 | 77 |
| Hilton, E.: Some Moisture-Loving Plants | 50 | 215 |
| Hilton, E.: The Cascade Mountains | 45 | 206 |
| Hilton, E.: Western American Mountain Flowers - California | 54 | 317 |
| Hilton, E.: Western American Mountain Flowers - California: Idaho | 53 | 243 |
| Hilton, E.: Western American Mountain Flowers - California: Montana | 53 | 170 |
| Hilton, E.: Western American Mountain Flowers - California: Oregon | 52 | 149 |