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11 August 2021 Pectis loiolae (Asteraceae: Tageteae): New Species Registered in a Natural Monument at an Archaeological Site in Northeast Brazil
Natanael Costa Rebouças, Valéria da Silva Sampaio, Mariana de Oliveira Bünger, Nádia Roque
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Abstract

Pectis comprises about 90 species distributed in North America, Mexico, the Caribbean, South and Central America, and the Pacific Islands. In Brazil, the genus is represented by 14 species that mainly occur in the Cerrado and five species that are endemic to the Caatinga domain. During field expeditions to the Lajedo de Soledade archaeological site, in the state of Rio Grande do Norte, Brazil, a new species of Pectis was found on rocky outcrops (lajedos) in the Caatinga. Pectis loiolae sp. nov. grows on limestone rocks in sedimentary substrate and is recognized by its prostrate habit with ascending branches terminating in a solitary capitulum, apex of the involucral bracts rounded, apiculate, and green becoming vinaceous in the apical 1/3, corolla of ray flowers (5) with abaxial surface vinaceous and adaxial white, disk flowers 8–10, and presence of stylopodium in the disk flowers. A morphological description, illustration, distribution map, habitat, conservation status, and a key for all Brazilian Pectis species are presented herein.

© Copyright 2021 by the American Society of Plant Taxonomists
Natanael Costa Rebouças, Valéria da Silva Sampaio, Mariana de Oliveira Bünger, and Nádia Roque "Pectis loiolae (Asteraceae: Tageteae): New Species Registered in a Natural Monument at an Archaeological Site in Northeast Brazil," Systematic Botany 46(2), 486-492, (11 August 2021). https://doi.org/10.1600/036364421X16231782047514
Published: 11 August 2021
JOURNAL ARTICLE
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KEYWORDS
Caatinga
Compositae
conservation
Endemism
Lajedo de Soledade
Rio Grande do Norte
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