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Issue: Vol. 619 No. 1: 5 Oct. 2023
Type: Article
Published: 2023-10-05
DOI: 10.11646/phytotaxa.619.1.2
Page range: 39-62
Abstract views: 366
PDF downloaded: 16

A “hairy situation” in Minas Gerais, Brazil: a striking new species of Krenakanthus (Bromeliaceae: Bromelioideae) covered with uniseriate trichomes

Jardim Botânico do Rio de Janeiro; Rua Pacheco Leão; 915; Rio de Janeiro; RJ; Brazil. Research Associate; Marie Selby Botanical Gardens; Sarasota; USA
Universidade Federal de São João del-Rei; campus Sete Lagoas; Departamento de Ciências Exatas e Biológicas; Rua Sétimo Moreira Martins; 188; Itapuã-II; 35701-970; Sete Lagoas; Minas Gerais; Brazil
Instituto Nacional da Mata Atlântica (INMA); Av. José Ruschi; 4; 29650-000; Santa Teresa; Espírito Santo; Brazil
Jardim Botânico do Rio de Janeiro; Rua Pacheco Leão; 915; Rio de Janeiro; RJ; Brazil. Centro Nacional de Conservação da Flora—CNCFlora; Rua Pacheco Leal; 915; Diretoria de Pesquisas; Rio de Janeiro; RJ; Brazil
Laboratory of Plant Anatomy; Department of Botany; Institute of Biosciences; Federal University of Rio Grande do Sul; Av. Bento Gonçalves; 9500; Porto Alegre; RS; Brazil
Laboratory of Palynology; Department of Botany; Museu Nacional; Universidade Federal do Rio de Janeiro; Quinta da Boa Vista; Sâo Cristóvão; Rio de Janeiro; RJ; Brazil
Laboratory of Plant Anatomy; Department of Botany; Institute of Biosciences; Federal University of Rio Grande do Sul; Av. Bento Gonçalves; 9500; Porto Alegre; RS; Brazil
Monocots anatomy Campos Rupestres Cryptanthoid complex João Pinto Center of Biodiversity morphology uniseriate trichomes

Abstract

A new species of Krenakanthus, a member of the bromelioid “Cryptanthoid complex”, is described based on plants discovered through collaborative citizen science. Krenakanthus ribeiranus and its only congener K. roseolilacinus are endemic to the “João Pinto Center of Biodiversity”, a still poorly explored region with Campos Rupestres and associated vegetation in the Rio Doce Valley, in eastern Minas Gerais state, Brazil. The unusual combination of morphological characters of K. ribeiranus, highlighted by plant delicacy and almost all leaf and flower parts covered by uniseriate, hair-like trichomes, is illustrated and discussed in comparison with K. roseolilacinus, including leaf and seed anatomy, as well as pollen morphology. This micro-endemic species is assessed as Critically Endangered, reinforcing the need for strategy to protect the biodiversity of the region. The morphology of the new species validates and strengthens the diagnostic flower characters used in the circumscription of Krenakanthus, suggesting as secondary diagnostic characters the habit, stature, and leaf conformation.

 

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