Loei
National parks
There are four national parks, along with two other national parks, make up region 8 (Khon Kaen), and Na Yung–Nam Som in region 10 (Udon Thani) and Phu Hin Rong Kla region 11 (Phitsanulok) of Thailand's protected areas.(Visitors in fiscal year 2024)[13]
| Na Yung–Nam Som National Park | 397 km2 (153 sq mi) | (9,520) |
| Phu Pha Man National Park | 350 km2 (140 sq mi) | (37,404) |
| Phu Kradueng National Park | 348 km2 (134 sq mi) | (66,941) |
| Phu Hin Rong Kla National Park | 307 km2 (119 sq mi) | (223,790) |
| Phu Ruea National Park | 121 km2 (47 sq mi) | (78,909) |
| Phu Suan Sai National Park | 117 km2 (45 sq mi) | (13,942) |
Wildlife sanctuaries
There are three wildlife sanctuaries, two of which are in region 8 (Khon Kaen), and Phu Khat in region 11 (Phitsanulok) of Thailand's protected areas.
| Phu Luang Wildlife Sanctuary | 897 km2 (346 sq mi) |
| Phu Khat Wildlife Sanctuary | 241 km2 (93 sq mi) |
| Phu Kho–Phu Kratae Wildlife Sanctuary | 232 km2 (90 sq mi) |
Provincial government
The province is divided into 14 districts (amphoe). The districts are further divided into 89 subdistricts (tambons) and 839 villages (mubans).
Gesneriaceae
Loei province is a well-known biodiversity hotspot for the Gesneriaceae (gesneriad) family in Thailand. Its unique blend of limestone karsts, sandstone mountains like Phu Kradueng, and elevation gradients harb a wide variety of these shade-loving, often endemic, flowering plants.
Notable Gesneriaceae species and genera found in Loei include:
- Chayamaritia sirindhorniana: A recently described (late 2024) and highly localized endemic to the province, known specifically from its type locality in Loei.
- Microchirita suwatii: Described in 2023, this specific Gesneriad is known to inhabit karst limestone areas in the Phu Bo Bid Forest Park in Mueang Loei.
- Oreocharis hirsuta: A succulent, pendulous herb that can be found clinging to rocks in oak forests, prominently at elevations around 1,300 m on Phu Kradueng.
- Paraboea species: Several unassigned or specifically identified Paraboea species (sometimes referred to locally by Thai naturalists) thrive on the shaded rocks of Loei's mountainous and limestone terrains.
- Dorcoceras: Found naturally in rocky and mountainous micro-climates in Northeastern Thailand.
- Didymocarpus biserratus barnett ดอกใบหยัก A succulent, pendulous herb with dark purple flowers that grows on rocks in oak forests, notably found in Phu Kradueng National Park.
- Didymocarpus bicolor Craib ภูเรือ ภูหลวง
- Didymocarpus purpureopictus Craib ภูเรือ ภูหลวง
- Henckelia moniliformis เศวตนาด้วง หรือ ดาวสร้อยไข่มุก พืชชนิดใหม่ของโลกที่พบในป่าโคกผาดำ อำเภอนาด้วง
- Henckelia: Various species within this genus occur naturally in northeastern Thailand, including highly specific habitats found in Phu Ruea.
- Microchirita aratriformis: พืชถิ่นเดียวที่พบได้ในบริเวณสวนหินผางาม (สวนสวรรค์) อำเภอหนองหิน
Common Localities to Find Gesneriads in Loei:
- Phu Kradueng National Park: Known for its plateau elevations around 1,300m, providing the perfect humid, shaded conditions for succulent, pendulous species.
- Phu Luang Wildlife Sanctuary: Rich in endemic flora where many original type specimens were collected.
- Phu Ruea National Park: Ideal for moisture-loving plants growing along high-altitude streams and rocky crevices.
- Doi Suwan Temple (Phu Kradueng): A specialized locality where unique regional plants, including certain Paraboea species, have been documented.
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