Plants Around US

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Across
  1. 4. One big main root
  2. 7. Underground part of a plant
  3. 9. The leaves contain a green substance called
  4. 12. The central big vein of a leaf
  5. 15. The process by which a seed grows into a young plant
  6. 16. Most expensive spice in the world
Down
  1. 1. The inner most layer of the stem
  2. 2. My outer most layer is called
  3. 3. Plants that bears buds in leaves for propogation
  4. 5. Store food for the baby plants
  5. 6. Cause extensive damage to crops
  6. 8. A modification seen in cactus
  7. 10. The flattened green part of leaf
  8. 11. I protect seeds
  9. 13. Structure that develops into flower
  10. 14. Tiny openings on the leaves