抄録
Autotetraploid has been raised in Lindernia crustacea, a medicinal weed, by treating the seedlings with 0.2 percent of aqueous solution of colchicine for 20 hours. Morphological and cytological characters of colchiploid and diploid were studied in detail. Cytology of colchiploid was highly non-synchronized and one interesting phenomenon was observed that the frequency of multivalents were very low whereas the sterility of pollen grains was very high. Other anomalies like clumping of chromosome at various stages, precocious separation of chromosomes, formation of univalents and unequal distribution of chromosomes at anaphase I and II were also observed and discussed. Pollen grains were variable in size.
