Abstract
The genus Zornia with ca. 80 species is composed of two subgenera, Myriadena and Zornia, the last with three sections (Zornia, Isophylla and Anisophylla) and presents a pantropical distribution. Morphologically it is characterized mainly by the flowers arranged in spiciform inflorescences with paired peltade bracteoles, protecting or hiding the calyx of the flower and often the fruit. This research aimed to the species of Zornia in the state Paraíba. Morphological studies were on materials collected and mainly in specimens deposited in the herbaria EAN, JPB, IPA and PEUFR. The species were identified consulting specialized bibliography, complemented by the analysis of digital pictures of the types. For each species was provided description and taxonomic and morphological comments, additionally a key for identification for the genus was also provided. The present seven species were recognized: Zornia brasiliensis, Z. latifolia, Z. leptophylla, Z. guanipensis, Z. myriadena, Z. reticulata, and Z. sericea. The species Zornia guanipensis, Z. myriadena, and Z. sericea are new records for the Paraiba state. The species Z. myriadena, Z. reticulata, Z. brasiliensis e Z. leptophylla have exclusive distribution in the Caatinga. Already Z. guanipensis occurred mainly in the Atlantic Forest specially in the restinga, while Z. sericea e Z. latifolia were distributed in both the Atlantic Forest and the Caatinga.
Key words:
Leguminosae; Dalbergieae; plant taxonomy; floristic diversity
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