Morphophenology and karyotype study of Patidoi (Schumannianthus dichotomus (Roxb.) Gagnep. synonym Clinogyne dichotoma Salisb.) - a traditional plant of Assam.

摘要

Patidoi (Schumannianthus dichotomus, syn. Clinogyne dichotoma) is a perennial shrub. Leaves are petiolated, distichous and sheathing. Flowering occurs during May-June, with 9-18 panicles (inflorescence) in each culm. Anthesis begins around 3.30 h and continues up to 10.00 h. Ovary is villous and three-celled. Fruits are indehiscent, subglobose and take 25-35 days to mature. Karyotypic study revealed that the species is diploid with 2n=20 (where n=x=10). The total haploid genome length is 12.7 micro m. The length of chromosome varies from 0.8 to 2.2 micro m, with predominance of metacentric and submetacentric behaviour..