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As espécies analisadas (Cattleya araguaiensis Pabst, C. bicolor Lindl., C. nobilior Rchb. e C. walkeriana Gardn.) apresentam epiderme uniestratificada em ambas as faces da lâmina foliar, ocorrendo estômatos na face abaxial; deposição de cera epicuticular em crostas, escamas, flocos e plaquetas; em C. araguaiensis ocorrem estegmatas incrustados nas células epidérmicas; em todas as espécies ocorre hipoderme com células de paredes espessadas; mesofilo bifacial, compacto; células paliçádicas atípicas, com barras de espessamento; feixes vasculares colaterais dispostos alternadamente, acompanhados por bainha de fibras; cordões fibrosos acompanhados por estegmatas ocorrem longitudinalmente na lâmina foliar; presença de ráfides. Os aspectos descritos revelam acentuada xeromorfia, em função de economia de água. The analyzed species (Cattleya araguaiensis Pabst, C. bicolor Lindl., C. nobilior Rchb. e C. walkeriana Gardn.) present unistratified epidermis at both surfaces with stomata at abaxial surface; deposition of epicuticular wax in crusts, scales, granules and plates; C. araguaiensis presents stegmata at epidermal cells; others characteristics present at all species are: hypodermis cells with thick walls; bifacial and compact mesophyll; atipic cells ofpalisade parenchyma with thichness bars; collateral vascular bundles alternate accompanied by sheath fibers; cordon fibers accompanied by stegmata in the foliar blade; raphids. The described aspects reveal accentuate xeromorphy for water economy

Anatomia foliar de quatro espécies do gênero Cattleya Lindl. (Orchidaceae) do Planalto Central Brasileiro