CHAPTER IX.
HOW PLANTS OBTAIN THEIR FOOD, I. 81 1. Sources of Plant Food. 81 2. Parasites and Saprophytes. 83 3. How Fungi Obtain their Food. 86 4. Mycorhiza. 91 5. Nitrogen gatherers. 92 6. Lichens. 93
HOW PLANTS OBTAIN THEIR FOOD, I. 81 1. Sources of Plant Food. 81 2. Parasites and Saprophytes. 83 3. How Fungi Obtain their Food. 86 4. Mycorhiza. 91 5. Nitrogen gatherers. 92 6. Lichens. 93