31. The Sierra de Manantl�n s varied and complex plant cover harbours a great wealth of flora. 32. The fast-growing plant covers trees and power lines across several states and has slipped into southern Missouri. 33. Normally, only about a third of the ground in the Sonoran Desert has plant cover , McAuliffe said. 34. The peat and decaying organic matter is more than ten feet thick under the dense plant cover . 35. It's time to plant cover crops of winter rye, to add nitrogen and tilth to the soil. 36. It lives in shallow water with plant cover , and it burrows into the substrate during dry periods. 37. The protected area of the plant covers . 38. They prefer water with ample plant cover , and occur naturally as far north as DR Congo and Tanzania. 39. That layer and its subsequent plant cover is the reason for the many mountain pastures in the area. 40. Gymnosperm plants covers about 0.6 ha.
