The flavonoid patterns of 11 taxa of Trifolium L., sect. Lupinaster were examined chromatographically. On the basis of the coded data the coefficients of association between the various taxa were determined and a hierarchic system based on chemical evidence established. The methods permitted objective numerotaxonomical use of chromatography to establish and support hierarchic systems and to express the relationships in definite and comparable mathematical terms. T. parryi and T. parryi salictorum were found to be very closely related. T. attenuatum, T. brandegei, and T. haydenii formed the next most related group, while T. kingii, T. dasyphyllum, T. alpinum, T. nanum, T. longipes, and T. latifolium formed a large, somewhat unrelated group of species.
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