Abstract
From the environment lesson that study about nature of fern with Satri Nakhonsawan School is a school that participate in botanical garden project of Princess Maha Chakri Sirindhorn. There are many types of plant in our school. One of that is fern. We can meet fern in many area of school. In some area are different in fern type like nature of leaf and spore. But the varieties of fern always grow in same area or in a group. So that makes it look interesting and study about fern. By distribute 5 part in process first is, To study about stem of Davallia trichomanoides. The study found that the stem of Davallia trichomanoides is rhizome. The leaves narrow, look like a long spear about 34 centimeters and are pinnately compound leaf. The leaves are Ventral leaf surface has many brown points. They are sporangium. Each sorus be placed on the veins of the leaves. Within one compound leaf will be approximately 480 sorus, depends on the position of the sorus and leaf size. And last one is an appearance of sporangium similar to millipedes curled around a curtain brown spherical bag which contained a large number of spores. Each sporangium is adjacent and aligned along the line leaves a lot of so, called sorus