Across
- 4. The special cotyledon of grasses
- 7. The secondary wood of cycads
- 9. The stellar arrangement of monocotyledons
- 10. Where the male organs mature ahead of the females
- 11. Description of the petal packing (aestivation) in Mimosoideae
- 12. The specialized pollen-bearing leaves of cycads and conifers
- 16. Hygroscopic valves of the Caesalpinioideae and Mimosoideae
- 17. Single-seeded, indehiscent fruits of daisies
- 18. The unusual anatomy of C4 plants
- 19. The distinctive pollen of the eudicots
- 22. Stalks of most flowers and of grass spikelets
- 24. Sticky glands attached to the pollen masses of orchids
Down
- 1. the inner bract of a grass floret
- 2. The specialized seed-bearing branches of conifers
- 3. Ovaries derived from the fusion of gynoecial units
- 5. The sterile structure surrounding an ovule
- 6. The unusual pollen of epacrids with only 1 functional grain
- 8. The actinomorphic daisy floret
- 13. The unit of the gynoecium
- 14. Legume subfamily with pea flowers and concealed sexual organs
- 15. A group that excludes some members of the most recent common ancestor
- 20. Aggregated pollen masses of Orchidaceae
- 21. The combination of the 4 pollen grains of a spore mother cell
- 23. The typical number of nuclei in an embryo sac