I was lucky to have an opportunity to get my hands on a digital light microscope with magnification up to x400! I have long wanted to know what is the true ID of two types of aquatic moss I have in my aquarium, so this is the ultimate imaging tool to get detail microscopic image of the moss leaf structure! According to the images below with reference to various moss photos and microscopic images illustrated in an article by the renown Singaporean moss expert Prof. Tan (read article in PDF, warning 6.8MB!) and also an article on various mosses (here), I think the three types of mosses I have are Christmas moss (Vesicularia montagnei or used to be named Vesicularia dubyana), the common Java moss (Taxiphyllum barbieri) and erect moss (Vesicularia reticulata). According these articles, Christmas moss leaves are nearly round to broadly oval with a short pointed tip and the leaf cells are wide and short in outline. In contrast, the Java moss leaves are narrow with elongated tip and the leaf cells are smaller and narrowly oblong. Erect moss are somewhat in between Christmas and Java moss. Erect moss leaves are ovate to ovate-lanceolate (lance-shaped) with consistently long pointed tip and leaf cells are oblong to short elongate and broad, longer than those seen in Christmas Moss, but not as long and narrow as the leaf cells of Java Moss.The three types of mosses I have are consistent with these descriptions respectively. | 
