Table 1.
Collection sites and essential oil yields for Piper essential oils from central Vietnam.
| Piper Species | Voucher Numbers | Collection Site | Plant Parts | Essential Oil Yield (%) a |
|---|---|---|---|---|
| Piper arboricola C. DC. | LTH 105 | Ngoc Linh Nature Reserve-Quang Nam Province (15°50’16.0” N, 107°22’54.7” E, elev. 1341 m) | Leaves & stems | 0.31 |
| Piper arboricola C. DC. | LTH 105 | Ngoc Linh Nature Reserve-Quang Nam Province (15°50’16.0” N, 107°22’54.7” E, elev. 1341 m) | Leaves | 0.32 |
| Piper arboricola C. DC. | LTH 105 | Ngoc Linh Nature Reserve-Quang Nam Province (15°50’16.0” N, 107°22’54.7” E, elev. 1341 m) | Stems | 0.12 |
| Piper bavinum C. DC. | LTH 107 | Ngoc Linh Nature Reserve-Quang Nam Province (15°50’16.0” N, 107°22’54.7” E, elev. 1341 m) | Leaves & stems | 0.34 |
| Piper cambodianum P. Fourn. | LTH 108 | Ba Na-Nui Chua Nature Reserve (16°00′06.6″ N, 108°01′22.1″ E, elev. 791 m) |
Leaves & stems | 0.34 |
| Piper caninum C. DC. | LTH 112 | Chu Mom Ray National Park (14°25’33.5” N, 107°43’15.6” E, elev. 672 m) | Leaves & stems | 0.10 |
| Piper longum L. | LTH 109 | Chu Mom Ray National Park (14°25’33.5” N, 107°43’15.6” E, elev. 672 m) | Leaves & stems | 0.15 |
| Piper mekongense C. DC | LTH 110 | Chu Mom Ray National Park (14°25’33.5” N, 107°43’15.6” E, elev. 672 m) | Leaves & stems | 0.32 |
| Piper montium C. DC. | LTH 111 | Chu Mom Ray National Park (14°25’33.5” N, 107°43’15.6” E, elev. 672 m) | Leaves & stems | 0.10 |
| Piper mutabile C. DC. | LTH 118 | Chu Mom Ray National Park (14°25’33.5” N, 107°43’15.6” E, elev. 672 m) | Leaves & stems | 0.38 |
| Piper nigrum L. | LTH 113 | Hoa Vang district, Da Nang city (16°01’0.6” N, 108°4’25.6” E, elev. 28 m) | Leaves & stems | 0.39 |
| Piper politifolium C. DC. | LTH 114 | Chu Mom Ray National Park (14°25’33.5” N, 107°43’15.6” E, elev. 672 m) | Leaves & stems | 0.37 |
| Piper rubrum C. DC. | LTH 115 | Ngoc Linh Nature Reserve-Quang Nam Province (15°50’16.0” N, 107°22’54.7” E, elev. 1341 m) | Leaves | 0.41 |
| Piper rubrum C. DC. | LTH 115 | Ngoc Linh Nature Reserve-Quang Nam Province (15°50’16.0” N, 107°22’54.7” E, elev. 1341 m) | Stems | 0.38 |
| Piper sarmentosum Roxb. | LTH 116 | Hoa Vang district, Da Nang city (16°01’0.6” N, 108°4’25.6” E, elev. 28 m) | Leaves & stems | 0.29 |
| Piper umbellatum L. | LTH 117 | Chu Mom Ray National Park (14°25’33.5” N, 107°43’15.6” E, elev. 672 m) | Leaves & stems | 0.025 |
a Yields are based on mass of fresh plant material.