Four new species of Dichorisandra (Commelinaceae) endemic from Bahia State, Brazil

Autor(es)

Aona, Lidyanne Y. S. ^[1] ; Faden, Robert B. ^[2] ; Bittrich, Volker ^[3] ; Amaral, Maria do Carmo E. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Reconcavo Bahia, Ctr Ciencias Agr Ambientais & Biol, Campus Univ, Rua Rui Barbosa 710, BR-44380000 Cruz das Almas, BA - Brazil

^[2] Smithsonian Inst, Natl Museum Nat Hist, Dept Bot, MRC 166, POB 37012, Washington, DC 20013 - USA

^[3] Rua Dr Mario de Nucci 500, BR-13083290 Campinas, SP - Brazil

^[4] Univ Estadual Campinas UNICAMP, Dept Biol Vegetal, Inst Biol, Caixa Postal 6109, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BRITTONIA; v. 68, n. 1, p. 61-73, MAR 2016.
• Citações Web of Science: 4

Resumo

The four new species described here occur in the Brazilian state of Bahia. Dichorisandra marantoides can be distinguished from other species of the genus by its chartaceous longitudinally ribbed leaves, flowers with five stamens and anthers opening introrsely by slits (being functionally poricidal). Dichorisandra bahiensis is similar to D. tejucensis due to the habit and leaf and flower morphology. However, the two species can be distinguished by the inflorescence, which in D. bahiensis is always positioned at the apex of the stems, perforating the sheath of the lowermost leaf of the lateral branch. Dichorisandra saxatilis resembles D. glaziovii by the morphology and color of anthers, but differs by presence of six stamens, the leaves regularly dispersed along the stem, their laminas glabrous on both sides, with the adaxial surface always green, never with white stripes. Dichorisandra leucosepala also can be distinguished from other species of the genus by white (rarely purplish at the apex), carnose sepals, six stamens with anthers opening by a single pore with purplish pollen sacs. Illustrations of the species, comparisons with similar species, discussions of diagnostic characters and conservation status of the new species are presented. (AU)

• Processo FAPESP: 03/06634-0 - Revisão taxonômica e análise cladística do gênero Dichorisandra Mikan (Commelinaceae)
• Beneficiário: Lidyanne Yuriko Saleme Aona Pinheiro
• Modalidade de apoio: Bolsas no Brasil - Doutorado