2. There were about 6-7 species of Metasequoia in Mesozoic Cretaceous and Cenozoic, which were considered extinct in the past. 194 1 year, China botanists first discovered this famous ancient and famous tree in Modaoxi, Wanxian County, Sichuan Province, Modaodao Town, Lichuan, Hubei Province. According to the recent investigation, giant trees over 300 years old have been found in Wanzhou, Shizhu County, Lichuan, Longshan and Sangzhi, Hunan Province.
Davidia involucrata is a deciduous tree. It can grow to 15 ~ 25m high, with wide oval leaves and serrated edges. There is only one genus and two species of undergraduate plants. The two species are very similar, but the leaves of one species are hairy and the leaves of the other species are smooth. The exotic flowers and herbs in the remaining plants were left over from the Cenozoic Tertiary 654.38 million years ago. During the Quaternary Glacier Period, Davidia involucrata died out in most areas, and only parts of southern China survived.
4. Camellia belongs to Camellia, Camellia, Camellia Nanshan, Camellia oleifera and Camellia sinensis, which is one of the first-class protected plants in the country. The flowers of Camellia chrysantha are golden and dazzling, as if coated with wax, glittering and translucent and oily.
5. Taiwania flousiana (scientific name: Taiwania flousiana), also known as Taiwania flousiana, Taiwan Province leaf, asarum, etc. , a large Taiwania plant of Taxodiaceae (Taxodiaceae is incorporated into Cupressaceae according to the classification of APG3), is endemic to Taiwan Province Province. It is mainly distributed in mountainous areas with an altitude of about1500 ~ 2500m in the middle of Taiwan Province Province. Due to illegal logging, this tree species is on the verge of extinction.