Pa Hin Ngam National Park

Pa Hin Ngam () is a national park in Chaiyaphum Province, Thailand. "Hin ngam" means "beautiful stone", "pa" means "forest". The park got its name from the strange rock formations at the west end of the park. Erosion has carved several large rocks into striking and unusual shapes.
In 1985, the Tep Satit Forestry Department first surveyed the area, long popular with locals, and recommended its protection. In October 1986, Pa Hin Ngam Park was created, covering 10 km2 around the strange rock formations which gave the park its name. In 1993, the Forestry Department of Thailand conducted a more thorough survey including the surrounding area, and recommended that it become a national park. The national park covering 112 km2 was created on 19 September 1994, which was officially gazetted in 2007.
The park is at the boundary of the Dong Phaya Yen Mountains and the Khorat Plateau. The steep cliff at the 846 m high Sut Phan Din viewpoint affords a view into a valley of the Sonthi River and the Sap Langka Wildlife Sanctuary. The name "Sut Phan Din" (สุดแผ่นดิน) means "end of land", reflecting the steepness of the cliff. This cliff also marks the watershed between the Chao Phraya and the Mekong rivers.
The plants in Pa Hin Ngam National park.
Pa Hin Ngam National park has the area that is full of green 112 square kilometers, has many kinds of plants, and the place to see the beautiful plants in the national park. There are two places that have different kinds of plant, the first is the place where you also can see the view that has a lot of trees called "Sut Phaendin" and the second is the place that has the most beautiful flower in the national park called "Bua Sawan Field".
When you are in the Sut Phaendin, you will see most of the area is a green field and it looks fertile because of many kinds of trees and they can be grown for the whole year. There are two different kinds of plants, the tropical plant and the dry evergreen plant. Also, these plants are protected by the officer of the national park for keeping them safe because the plants can be easy to destroy. However, the second place called "Bua Sawan Field" has more beautiful plants than Sut Phaendin.
Bua Sawan Field, has only a plant is called "Siam tulip" because it is a flower that is related to various ginger species such as turmeric. Another name that people actually call this flower is "Dok Kra jiao". The people that come to Plants in Pa Hin Ngam, they also come to see this flower. But Dok Kra jiao 's flower doesn’t grow for the whole year, It grows only on the rainy season. It is the most beautiful plant in the national park.
Plants in Pa Hin Ngam National Park have very big area and full of green, there are many kinds of the plan. Especially the Bua Sawan Field, it has only one the plant that is called "Siam tulip" or "Dok Kra jiao" which grows in the rainy season while in Sut Phaendin, has many kinds of trees that grow for the whole year
References.
“Dry Evergreen or Semi Evergreen Forest”,ธวัชชัย สันติสุข,2009.http://chm-thai.onep.go.th/chm/ForestBio/Dry_Evergreen.html,Access:30 March 2018