| Entry | Volume | Pages |
|---|---|---|
| Asclepias cordifolia | 48 | 153 |
| Asclepias cryptoceras | 10 | 168 |
| Asclepias cutleri | 12 | 65 |
| Asclepias exaltata | 74 | 45C, 46 |
| Asclepias incarnata | 74 | 46 |
| Asclepias perennis | 74 | 46 |
| Asclepias ruthiae | 12 | 65 |
| Asclepias speciosa | 78 | 407 |
| Asclepias syriaca | 74 | 46 |
| Asclepias tuberosa | 74 | 45 |
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