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The aim of this work was to propose a methodology for commercial classification of gerbera´s capitulum based on the trans flowers overlap coefficient. Three to eight capitula of twenty-eight cultivars of gerbera cut flower and seven non-commercial accesses were used. The width measurement of the trans flowers group (internal ray flower) as well as the sum of the width of the trans and ray flowers (external ray flower) groups were taken from each capitulum. The average of each access and the overlap coefficient were calculated (CS = width of the trans flowers group / &#931; of the width of the trans and ray flowers groups) and submitted to the multivariate analysis, to verify the grouping by the average Euclidian distance matrix. It is proposed that gerberas with CS= 0.01 to 0.15 be classified as simple, CS= 0.16 to 0.40 as semi-double and CS superior to 0.41 as double. The overlap coefficient (CS) can be used to systematize the classification of the gerbera capitula, reducing the divergences in the classification and the subjectivity in the decisions of producers, florists and breeders. Objetivou-se neste trabalho propor uma metodologia para classificação comercial dos capítulos de gérbera com base no coeficiente de sobreposição das flores trans. Foram utilizados três a oito capítulos de vinte e oito cultivares de gérbera com aptidão para corte e sete acessos não comerciais. Em cada um dos capítulos realizou-se a medição da largura do conjunto das flores trans (flores do raio interno) e a soma da largura do conjunto das flores trans e do raio (flores do raio externo). Com isso, calcularam-se os coeficientes de sobreposição das flores trans (CS= largura do conjunto das flores trans / &#931; da largura do conjunto das flores trans e do raio) e submeteram-se os dados à análise multivariada, com a finalidade de verificar o agrupamento mediante matriz de distância euclidiana média. Propõe-se que gérberas com CS= 0,01 a 0,15 sejam classificadas como simples, CS= 0,16 a 0,40, semidobradas e CS superior a 0,41, dobradas. O coeficiente de sobreposição pode ser utilizado para sistematizar a classificação dos capítulos de gérbera, reduzindo as divergências e a subjetividade nas decisões de produtores, floricultores e melhoristas

Proposal for commercial classification of the gerbera capitulum based in the flower overlap index