A botanical crossword

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Across
  1. 3. Leaf stalk (7)
  2. 7. New Zealand tree whose wood was used by early settlers to make butter boxes for export (9)
  3. 9. A popular garden plant from the Three Kings Islands. All plants today descend from a single individual (10,8)
  4. 11. Tallest moss in the world (scientific name) (8,7)
  5. 14. Moisture-loving tree with buttress roots (common name) (7)
  6. 16. Sophora species that only grows around Cook Strait (scientific name) (7)
  7. 17. Hook grasses (Uncinia) have recently been transferred to this genus (5)
  8. 20. Small shrub similar in appearance to 17 Down but distinguished by its hair-like stipules (scientific name) (8,6)
  9. 22. Genus of distinctive introduced orange fungus (scientific name) (12)
  10. 24. Seed coat (5)
  11. 27. Early NZ botanist who was also a missionary and printer (7)
  12. 28. Leptinella _____ a threatened species with a population near Titahi Bay (4)
  13. 29. Māori name of the plant also known as wild Irishman (9)
  14. 30. Mass of pollen grains in an orchid (8)
Down
  1. 1. A plant that grows on another plant (but which is not parasitic) (8)
  2. 2. Word that means obtaining native plants from local areas (11)
  3. 4. Species of speargrass/Aciphylla that grows around the Wellington coast (scientific name) (9)
  4. 5. Stalk that holds up an anther (8)
  5. 6. Genus of NZ’s only indigenous fully parasitic plant (scientific name) (12)
  6. 8. Species that mimics horopito (Pseudowintera colorata) (scientific name) (10, 7)
  7. 9. Māori name for Muehlenbeckia astonii (8)
  8. 10. Large brown algae (4)
  9. 12. Nationality of Carl Linnaeus, the father of taxonomy (7)
  10. 13. The perching lily genus Collospermum has now been transferred to this genus (7)
  11. 15. The most speciose genus of New Zealand shrubs (8)
  12. 18. One of the only two NZ species in the Proteaceae (common name) (8)
  13. 19. Small flowered Veronica tree with knobbly trunk found at Te Kopahou reserve (10)
  14. 21. Number of southern beech species in New Zealand (4)
  15. 23. Floating native fern (6,5)
  16. 25. Tree whose wood was used by Māori for fishing floats (4)
  17. 26. A plant that completes its lifecycle in one growing season (6)
  18. 27. NZ plant genus that once killed an elephant (scientific name) (8)