"Convolvulaceae neotropicae novae vel minus cognitae" III"Jacquemontia austiniana" J.R.Grande sp. nov. ("Convolvulaceae"), a new species from the Venezuelan Guayana

  1. Grande Allende, José Ramón
Revista:
Anales del Jardín Botánico de Madrid

ISSN: 0211-1322

Any de publicació: 2019

Volum: 76

Número: 1

Tipus: Article

DOI: 10.3989/AJBM.2508 DIALNET GOOGLE SCHOLAR lock_openDialnet editor

Altres publicacions en: Anales del Jardín Botánico de Madrid

Resum

As a part of a taxonomic update of the family Convolvulaceae Juss. for Guayana Shield, the species Jacquemontia austiniana J.R.Grande sp. nov., is described and illustrated as new to science. This species is characterized by its linear-subulate bract, ovate-lanceolate external sepals, conspicuously acuminate, villose, with the margins ciliate, and a relatively large and infundibuliform corolla. To date, this is the only species of Jacquemontia Choisy endemic to the Guayana Shield; its relationships within the genus are still to be elucidated.

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I am very grateful with Daniel F. Austin (1943-2015), for his advice and encouragement in the study of the Convolvulaceae, especially of the genera Ipomoea L. and Jacquemontia, the cited herbaria for made available studied specimens, Stephen Tillett (MYF) for reviewing the English, Fernanda Cabral (INPA) for photographic material from INPA and MO, and Mar?a Teresa Buril for providing some of the cited references. The line drawing of the figure 1 was made by Bruno Manara (R.I.P.; 1939-2018), who also reviewed the Latin diagnosis.

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