RESUMO O Cerrado é o segundo maior bioma brasileiro em extensão, com cerca de 204 milhões de hectares, ocupando aproximadamente 22% do território nacional. O trabalho foi desenvolvido em uma área de Cerrado sensu stricto inserido na Reserva Legal da Fazenda Experimental da UFT, campus de Gurupi-TO e teve como objetivo realizar um estudo da florística e fitossociologia do estrato arbustivo-arbóreo de uma área de cerrado sensu stricto, Gurupi, Tocantins. Foram instaladas cinco parcelas de 20 × 50 m. Todos os indivíduos arbóreos, com diâmetro ≥ a 10 cm medidos 1,30 cm do solo, foram amostrados. Foram amostrados um total de 906 indivíduos, distribuídos em 97 espécies, incluídas em 76 gêneros, pertencentes a 39 famílias. Os índices de diversidade foram expressivos (H' = 3,69) e (J' = 0,81), denotando uma elevada biodiversidade local, além de refletir um bom estado de conservação desse fragmento de cerrado sensu stricto. PALAVRAS-CHAVE: diversidade, flora lenhosa, região norte FLORISTIC OF ESTRATO THE WOODY OF A CERRADO AREA SENSU STRICTO, GURUPI, TOCANTINS ABSTRACT The Cerrado is the second largest Brazilian biome, with about 204 million hectares, occupying approximately 22% of the national territory. The study was conducted in a strict sense Cerrado inserted in the Legal Reserve of Experimental UFT Farm campus Gurupi-TO and aimed to carry out a study of the floristic and phytosociology of shrub-tree layer of a cerrado area, Gurupi, Tocantins. They were installed five plots of 20 × 50 m. All trees with a diameter ≥ 10 cm measured 1.30 cm of soil were sampled. We sampled 906 individuals, distributed in 97 species, included in 76 genera belonging to 39 families. The diversity indices were significant (H '=
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