23231331
[Early flowering plants] (monosulcate pollen)
- 0 Hegel's 'System of Science'
- 1 Logic (Thinking of Thinking, Science of Science)
- 2 Nature (science of matter)
- 3 Spirit/Mind (Science of humanities)
- 21 Mechanics
- 22 Physics (including Chemistry)
- 23 Organism / Life (Subjectivity)
- 231 The Earth (Geology)
- 232 Plant life (biology of the vegetal)
- 233 Animal life (biology of the animal)
- 2321 Shapes of plant life
- 2322 Plant relation to its enviroment
- 2323 Genus process of the plants
- 23231 [Special plant species]
- 23232 Beginnings of sexual organs
- 23233 Fertilization
- 232311 [Thallophytes] (without root, shoot or leaf)
- 232312 [Spore plants] (alternation of generations, dispersal by spores)
- 232313 [Seed plants] (seed instead of spore)
- 2323131 [Seed ferns] (extinct: the first seed on a fern frond)
- 2323132 [Gymnosperms] (seed exposed on the scale)
- 2323133 [Angiosperms] (true flowering plants)
- 23231331 [Early flowering plants] (monosulcate pollen)
- 23231332 [Monocotyledonous]
- 23231333 [Dicotyledons] (tricolpate pollen, eudicots)
- 232313311 [Water-lily group] (water lilies, Amborella: the oldest flowering plants)
- 232313312 [Magnolias] (magnolias, tulip trees)
- 232313313 [Laurels and peppers] (laurel, pepper, birthwort)