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No presente trabalho é analisada a anatomia de folhas de sol, completamente expandidas de: Leucothoe oleifolia (Cham) A.C. - Ericaceae, Palicourea marcgravii St. Hil. - Rubiaceae e Waltheria cinerescens St. Hil. - Sterculiaceae, provenientes de dunas interioranas. A área em questão, representa zona de transição entre cerrado e floresta. Anatomicamente, as três espécies apresentam características xeromorfas, tais como: células da epiderme abaxial com paredes anticlinais retas ou levemente curvas, espessadas; tricomas tectores ou secretores; camadas subepidérmicas aclorofiladas; parênquima paliçádico denso; paredes das células do parênquima clorofíliano com espessamentos faveolados; bainhas-de-feixe e extensões-de-bainha parenquimáticas, esclerenquimáticas ou compreendendo os dois tecidos. Os caracteres referidos não ocorrem simultaneamente. Three inland dune species were studied in the present investigation, with regard to their leaf anatomy: Leucothoe oleifolia (Ericaceae), Palicourea marcgravii (Rubiaceae) and Waltheria cinerescens (Sterculiaceae). The ecological area in which these species line is considered to be a transition between cerrado and forest. Xeromorphic characters are seen in the three species such as: adaxial epidermis with anticlinal cell walls being thickened as well as even or slightly curved when this tissue is observed in surface view; stomata and trichomes of the non-glandular and glandular types - in great number; achlorophyllous subepidermal layers; compact palisade parenchym; cell walls with reticulate thickening in the chlorenchyma; bundle sheaths and bundle sheath extensions occuring in three types: sclerenchymatous, parenchymatous and partly parenchymatous. The mentioned characters do not occur simultaneously

Contribuição ao conhecimento da anatomia foliar de espécies da vegetação das dunas interioranas do Municipio de Lençois-Bahia