| Abbreviation | Definition |
|---|---|
| NPGS | National Plant Germplasm System |
| NPI | Not Plant Induced |
| NPPA | National Pest Plant Accord |
| NPSB | National Policy and Strategy for Biodiversity |
| NPSP | Native Plant Stewardship Program |
| NPV | Non-Photosynthetic Vegetation |
| NS | Natural Selection |
| NS | Number of Species |
| NSBP | Native Species Breeding Program |
| NSMO | National Seed Management Office |
| NSPT | National Sunflower Performance Trials |
| NTBG | National Tropical Botanical Garden |
| NUS | Neglected and Underutilized Species |
| NVC | National Vegetation Classification |
| NVS | N-Viro Soil |
| NYBG | New York Botanical Garden |
| NYMS | New York Microscopical Society |
| NZCPA | New Zealand Centre for Precision Agriculture |
| NZF | New Zealand Flower |
| O | Ovangkol |