Exhuming Saint-Hilaire: revision of the Drosera villosa complex (Droseraceae) supports 200 year-old neglected species concepts

Abstract

The Drosera villosa complex is here reviewed and includes six species endemic to Brazil: D. villosa, here identified for the first time as a narrow endemic species native to the neighboring highlands of the Serra Negra and Serra do Ibitipoca, in southern Minas Gerais state; D. ascendens, rediscovered nearly 200 years after its description, narrowly endemic to the Diamantina Plateau, central Minas Gerais; D. graomogolensis, endemic to northern Minas Gerais, but here found to be more widespread than previously reported; D. latifolia, a highly polymorphic and widespread taxon, previously placed in synonymy of D. villosa and heretofore misidentified as D. ascendens, is here elevated to species rank; and two new species here described, D. riparia and D. chimaera. Furthermore, two new natural hybrids are reported: D. villosa × D. tomentosa var. glabrata and D. latifolia × D. tomentosa. The morphological characters distinguishing these taxa from each other and from similar species are discussed, together with habitat and ecological information, detailed illustrations and photographs, distribution maps, and a key to the species of the D. villosa complex is provided. ResumoO complexo Drosera villosa é aqui revisado e é composto por seis espécies endêmicas do Brasil: D. villosa, aqui identificada pela primeira vez como uma espécie endêmica das vizinhas Serra Negra e Serra do Ibitipoca, no sul de Minas Gerais; D. ascendens, redescoberta após quase 200 anos, micro-endêmica no Planalto de Diamantina, no centro de Minas Gerais; D. graomogolensis, endêmica do norte de Minas Gerais, porém aqui considerada mais amplamente distribuída do que reportado anteriormente; D. latifolia, um táxon altamente polimórfico e amplamente distribuído, anteriormente colocado em sinonímia de D. villosa e até então erroneamente identificado como D. ascendens, é aqui elevado ao status de espécie; e duas novas espécies que são aqui descritas, D. riparia e D. chimaera. Dois novos híbridos naturais são reportados: D. villosa × D. tomentosa var. glabrata e D. latifolia × D. tomentosa. As características morfológicas que distinguem esses táxons uns dos outros e de espécies similares são discutidos, juntamente com informações sobre habitat e ecologia, ilustrações detalhadas e fotografias, mapas de distribuição e uma chave para as espécies do complexo D. villosa é apresentada.Palavras-chave: Brasil, Cadeia do Espinhaço, Chapada Diamantina, espécies novas, plantas carnívoras.

<htm>Arthropods associated with the carnivorous plant Drosera latifolia (Droseraceae) in an area of Atlantic Forest (southeastern Brazil)</htm>

“…America (GONELLA et al 2014). Drosera are herbaceous plants, their leaves covered with stalked glands on the upper surface of the lamina, producing an adhesive mucilage that captures small arthropods.…”

“…Drosera latifolia (Eichler) Gonella & Rivadavia (Fig. 1) (GONELLA et al 2014). The main similarities between these six species are the semierect oblong to lanceolate leaves, the small rectangular stipules, and microanatomical characters of the non-carnivorous leaf trichomes (GONELLA et al 2014).…”

Future Perspectives of Drosera Magnifica: The First Ever Plant Discovered on the Social Media

“…They do not even bear true roots instead leaves are modified to accommodate a trap function on either aerial or underground/submersed parts. Animals are caught by traps formed by highly specialized metamorphous leaves 2 . Root porosity and root depth were quantified in eight carnivorous plant species and 48 non-carnivorous species within a nutrient-poor wet pine savanna in south Mississippi, USA 3 .…”

Avaliação da comunidade microbiana saprofítica e funcional associada à planta carnívora Drosera latifolia (Eichler) (Droseraceae)

“…St.-Hil., recently reclassified as Drosera latifolia (Eichler) (GONELLA et al, 2014), occurs in habitats with high altitudinal ranges, wet, exposed to full solar radiation and established on low-fertility substrate (SARIDAKIS et al, 2004). Many authors have suggested interactions between carnivorous plants and microorganisms (JUNIPER; ROBINS; JOEL, 1989;SCHULZE;SCHULZE, 1997;KOOPMAN;CARSTENS, 2011), including free living N-fixing bacteria (JUNIPER; ROBINS; JOEL, 1989;SCHULZE;SCHULZE, 1997;SARIDAKIS, 2002;ALBINO et al, 2006) and culturable fungal root endophytes (QUILLIAM; JONES, 2010), arbuscular mycorrhizal fungi and dark septate endophytic fungi (FUCHS;HASELWANDTER, 2004;WEISHAMPEL;BEDFORD, 2006).…”