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Meiotic chromosome numbers of 12 taxa of medicinal plants are reported. Chromosome counts for Colebrookea oppositifolia n=16, Cyathula prostrata n=21, Aerva lanata n=8, Trema orientalis n=20, Girardinia zeylanica n=10 and Streblus asper n=13 are new records for these genera. Chromosome number for Ophiorrhiza mungos n=11, Plumbago zeylanica n=14, Clerodendrum viscosum n=24, Polygonum chinense n=11, Acalypha indica n=10 and A. paniculata n=10 are reported for the first time.
C. Gajapathy (Fri,) studied this question.