After a continuous moist weather spell since last 3 weeks, I could see green, slimy patches in my garden within the plants and also on the borders of the garden. I scraped a sample from the patches and saw the different types of microflora. I am not sure, but I can make out some algae and liverworts. Probably Chlorella, Scendesmus and some filamentous green algae have inhabited the garden humus.