ACROSS
1. Slow-growing evergreen shrub () yielding a starchy staple food (4,4) 5. Sum of all creatures in their natural environments (8) 9. Implement for turning up soil in ridges and furrows (6) 10. Collective term for low shrubs beneath a canopy of trees 11. Natural impulses (8) 14. Marsh plant of the grass-like genus (4) 17. Senseless (5) 18. Torpid; sleepy (9) 19. The African _____ antelope is a thick-necked animal; the adult males having glossy black coats (5) 20. Genus of evergreen trees that are also called African mahogany (5) 22. Shoals of whales (7) 23. On the ocean (2,3) 25. Branch of a tree (5) 27. Business of cultivating or selling flowers (9) 28. Drink in large draughts (5) 30. Luxuriant (plant growth) (4) 32. South African thin spears of hard wood with iron tips (8) 34. Repeated over and over (10) 35. A _____ crop is one sown in order to help an existing crop by adding nutrients, preventing soil erosion, etc (6) 36. Descriptive of one from Edinburgh (8) 37. Animals driven out of their herds (8)
