Across
- 5. the central part of an ovule, containing the embryo sac.
- 6. having the male and female reproductive organs in separate individuals.
- 7. a plant that has seeds unprotected by an ovary or fruit.
- 9. each of the microscopic particles, typically single cells, of which pollen is composed
- 10. intermediate appearances in ferns and palms.
- 11. used in some classifications for one of five subdivisions of Gymnospermophyta.
- 13. the protective outer coat of a seed.
Down
- 1. a division of plants, grouped within the gymnosperms
- 2. a vascular plant
- 3. a flowering plant's unit of reproduction, capable of developing into another such plant
- 4. a tough outer protective layer, especially that of an animal or plant.
- 8. a leaf that bears sporangia
- 12. a sticky flammable organic substance, insoluble in water, exuded by some trees and other plants