Abstract:

In this paper, 2 new taxa of the genus Tupistra Ker-Gawl. are reported and 4 viewpoints about the evolutionary trend within the genus are submitted as following: 1.Spe-cies with flowers of short styles and small stingmas lower than of as high as anthers is primitive while that of long styles and big stigmas higher than anthers is advanced; 2. Species with flow-ers without annuli in perianth tubes is more primitive than that with annuli; 3.Species with flowers of 1 bract each is more primitive than that of several bracts; 4. Karyotype evolves from symmetry to asymmetry then bimodal.

Key words: Tupistra, T.fimbriata var. breviloba, T.annulata, Taxonomic system, Karyotype