| | 580 | botany | |
| ↑ | 580 | botany in general |   → 630 ≈ S.SPEC.20.AC |   |
| ↑ | 580.12 | systematic botany | ≈ S.FLORE.G | |
| ↑ | 580.14 | plant names and terminology | | |
| ↑ | 580.73 | botanical gardens | ≈ S.SPEC.20.AB | |
| ↑ | 580.74 | botanical museums, herbariums | | |
| ↑ | 580.9 | history of botany | ≈ S.SPEC.20.AB | |
| ↑ | 581 | plant characters, genetics and ecology | → 571.2 572.2 | |
| ↑ | 581.092 | botanists | | |
| ↑ | 581.3 | plant genetics and physiology | → 576.5 631.52 | |
| ↑ | 581.6 | plant uses and effects | | |
| ↑ | 581.634 | medicinal plants | → 615.321 | |
| ↑ | 581.7 | plants of special environments, plant ecology | → 577 ≈ S.SPEC.24.AH | |
| ↑ | 581.753 | mountain, Alpine plants | | |
| ↑ | 581.9 | phytogeography, floras | ≈ S.SPEC.24.AH S.FLORE | |
| ↑ | 581.94 | plants of Europe | ≈ S.FLORE.H S.FLORE.I | |
| ↑ | 581.941 | plants of Ireland, UK in general, Scotland | | |
| ↑ | 581.942 | plants of England and Wales | | |
| ↑ | 581.943 | plants of Germany and Central Europe | → 581.9494 | |
| ↑ | 581.9436 | plants of Austria | | |
| ↑ | 581.9437 | plants of Czech Rep. and Slovakia | | |
| ↑ | 581.9438 | plants of Poland | | |
| ↑ | 581.9439 | plants of Hungary | | |
| ↑ | 581.944 | plants of France | | |
| ↑ | 581.945 | plants of Italy | ≈ S.FLORE.C | |
| ↑ | 581.9451 | plants of NW Italy | | |
| ↑ | 581.9452 | plants of Lombardy | | |
| ↑ | 581.94529 | plants of Pavia province | | |
| ↑ | 581.9453 | plants of NE Italy | | |
| ↑ | 581.9454 | plants of Emilia-Romagna | | |
| ↑ | 581.9455 | plants of Tuscany | | |
| ↑ | 581.9456 | plants of central Italy | | |
| ↑ | 581.9457 | plants of continental southern Italy | | |
| ↑ | 581.9458 | plants of Sicily | | |
| ↑ | 581.9459 | plants of Sardinia | | |
| ↑ | 581.946 | plants of Spain and Portugal | | |
| ↑ | 581.947 | plants of Russia, Ukraine and Baltic countries | | |
| ↑ | 581.948 | plants of Scandinavia and Finland | | |
| ↑ | 581.949 | plants of other European countries | | |
| ↑ | 581.9492 | plants of Netherlands | | |
| ↑ | 581.9493 | plants of Belgium and Luxembourg | | |
| ↑ | 581.9494 | plants of Switzerland | → 581.943 | |
| ↑ | 581.9495 | plants of Greece | | |
| ↑ | 581.9497 | plants of former Yugoslavia | | |
| ↑ | 581.9498 | plants of Romania | | |
| ↑ | 581.95 | plants of Asia | ≈ S.FLORE.F | |
| ↑ | 581.951 | plants of China and Korea | | |
| ↑ | 581.9519 | plants of Korea | | |
| ↑ | 581.952 | plants of Japan | | |
| ↑ | 581.955 | plants of Iran | ≈ S.FLORE.M | |
| ↑ | 581.96 | plants of Africa | ≈ S.FLORE.L | |
| ↑ | 581.966 | plants of western Africa | | |
| ↑ | 581.967 | plants of central Africa | | |
| ↑ | 581.968 | plants of southern Africa | | |
| ↑ | 581.97 | plants of North and Central America | ≈ S.FLORE.M S.SPEC.41.FC | |
| ↑ | 581.98 | plants of South America | ≈ S.FLORE.N S.SPEC.41.FB | |
| ↑ | 581.985 | plants of Peru | | |
| ↑ | 581.987 | plants of Venezuela | | |
| ↑ | 581.99 | plants of Oceania | | |
| ↑ | 582 | herbaceous, woody plants, flowers | → 635.9 | |
| ↑ | 582.0463 | flowers and their parts | ≈ S.SPEC.28.AR | |
| ↑ | 582.13 | flowers | → 635.9 | |
| ↑ | 582.16 | trees | | |
| ↑ | 586 | cryptogams | ≈ S.SPEC.25.AL S.SPEC.26.AN | |
| ↑ | 587.3 | ferns, filicopsida, polipodiopsida | | |
