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Issue: Vol. 665 No. 3: 24 Sept. 2024
Type: Article
Published: 2024-09-24
DOI: 10.11646/phytotaxa.665.3.10
Page range: 282-290
Abstract views: 141
PDF downloaded: 136

A new nothospecies of Prosthechea (Orchidaceae: Laeliinae) from the Diamantina Plateau, Minas Gerais, Brazil

Harvard University Herbaria, 22 Divinity Avenue, Cambridge, MA 02138, USA.
University of Neuchâtel, 11 Emile-Argand St., Neuchâtel, CH-2000, Switzerland.
Universidade Federal dos Vales do Jequitinhonha e Mucuri, Rodovia MGT 367 - km 583, nº 5000, 39100-000, Diamantina, Minas Gerais, Brazil.
Espinhaço Range hybridization natural hybrid Serra do Espinhaço taxonomy Monocots

Abstract

Based on morphological evidence found in some specimens recently collected in the Diamantina Plateau region, Minas Gerais State, Brazil, a new natural hybrid between Prosthechea calamaria and P. faresiana is described and illustrated as P. ×riopretensis. Both putative parental species are known for the region and their flowering period overlaps. The new nothospecies carries most of the morphological features of P. calamaria, such as short plants (≤ 19 cm height) and inflorescences (≤ 7 cm long), and flowers with a small ovate lip (≤ 1 cm long), but the floral color pattern are remarkably like P. faresiana – sepals and petals covered by longitudinal vinaceous stripes. In addition to a digital composite plate of the taxonomic novelty, further images and a distribution map of the new nothospecies and its putative parents are provided, as well as notes on morphology, phenology, and ecology.

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