1. Monotypic genera are those which contain only one species.

2. Its floristic characteristics included more monotypic genera, obvious advantage phenomenon, less particular plants and complex and diversified geographical composition of plant flora.

3. The dominant families, genera and species are prominent. Monotypic and oligotypic species are also abundant.

4. Lychnothamnus (Characeae) is a monotypic genus with Euro-Australasian distribution. The species is considered in decline.

5. Taxonomical status of the monotypic genus is distinct, and the distribution is specific too.

6. Tetrathyrium is a monotypic genus endemic to China and is thus of great scientific importance. This species was first discovered in Hong Kong Island between 1857 and 1858.

7. There are 562 genera accounting for 91.23% in total genera, which are the oligotypic and monotypic ones with less than 5 species.

8. In addition, most taxa described from the Cambrian Lagerst?tte are monotypic genera,[http://] represented by only one species.

9. Therefore, the study of the genetic relationship and the mycogeography of the monotypic genus have important theoretical values.

10. So it seems reasonable to separate Pseudolarix from Laricoideae and to establish a new monotypic subfamily Pseudolaricoideae Li.

11. Objective To investigate the clinicopathologic features and differential diagnosis of hepatic monotypic epithelioid angiomyolipoma ( MEA ) .