Abstract
By the morphological studies on flowers and heads of 385 varieties of. “Wangul” cultivated in Korea (382 of Cyperus lwasakii M. and 3 of C. gloleceratus L. ) the following results were obtained. ( 1 ) C. Iwasakii and C. glomeratus can be distinguished by the form of flowers. In the head-length there is not much difference between them, but C. lwasakii has much more peduncles and is wider in angle between stern and peduncle than those of C. glomeratus. ( 2 ) The length and number of peduncles and so-called head-type (angle between stem and peduncle) of all the varieties belonging to C. lwasakii were statistically studied, and the results, indicated that all the characteristics showed the normal curves and there was not observed any variation suggesting the necessity of establishing the sub-species.
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