title: Two new combinations in Euploca Nutt. (Heliotropiaceae, Boraginales) and a conspectus of the species of the Guiana Shield area.
abstract: Heliotropium foliatum and Tournefortia humilis are transferred to Euploca Nutt. respectively as Euploca foliata comb. n. and Euploca humilis comb. n. A collection from Guyana has been recently identified as Euploca humistrata, a species previously considered a Brazilian endemic. A collection from French Guiana documents for the first time the species in that country. A key to the species of the Guiana Shield area is given. The species of Euploca from the Guiana Shield are listed with synonymy and a brief description: Euploca filiformis, Euploca humilis, Euploca humistrata, Euploca lagoensis, Euploca polyphylla, Euploca procumbens.
authors.affiliation: Department of Botany, MRC-166, National Museum of Natural History, Smithsonian Institution, P.O. Box 37012, Washington, DC 20013-7012, USA; Current address: Department of Botany and Plant Pathology, 2082 Cordley Hall, Oregon State University, Corvallis OR 97331-2902, USA.
authors.forename: Christian
authors.initials: C
authors.lastname: Feuillet
keywords: Boraginales; Brazil; Euploca; Guiana Shield; Guianas; Heliotropiaceae; Venezuela