The world of plants

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Across
  1. 2. Sharp point on a stem or branch:
  2. 3. Unopened flower:
  3. 4. The colorful part that makes seeds:
  4. 5. Small plant, usually with many branches:
  5. 6. Supports the plant and carries water:
  6. 9. Plant that stores water, grows in deserts:
  7. 10. Short green plant covering the ground:
  8. 13. Part of a flower, often colorful:
  9. 14. Large plant with a trunk:
  10. 16. Plant with feathery leaves, no flowers:
  11. 17. Needed for photosynthesis:
Down
  1. 1. Plants grow in this:
  2. 3. Outer layer of a tree trunk:
  3. 4. Grows from flowers, holds seeds:
  4. 7. Soft, green plant without flowers:
  5. 8. Green parts of plants that make food:
  6. 11. Grows underground and absorbs water:
  7. 12. From this a new plant grows:
  8. 13. Type of tree with needles and cones:
  9. 15. A plant with a long stem that climbs: