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Subclass QK
| QK1-989 | Botany | ||
| QK1-474.5 | General Including geographical distribution | ||
| QK474.8-495 | Spermatophyta. Phanerogams | ||
| QK494-494.5 | Gymnosperms | ||
| QK495 | Angiosperms | ||
| QK504-(638) | Cryptogams | ||
| QK640-(707) | Plant anatomy | ||
| QK710-899 | Plant physiology | ||
| QK900-989 | Plant ecology | ||
