Three new species of Habenaria (Orchidaceae) from Serra da Canastra, Minas Gerais, Brazil

Batista, J. A. N.; Carvalho, B. M.; Ramalho, Aline J.; Bianchetti, Luciano B.

doi:10.11646/phytotaxa.13.1.2

Cited by 979 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and the recently described H. psammophila J.A.N.Bat., Bianch. & Carvalho (Batista et al ., ). Based on the presence of this morphological feature, we suggest that the pollination mechanism of these orchids may be similar to that reported here for H. megapotamensis .…”

Section: Discussionmentioning

confidence: 97%

Pollination biology of four sympatric species of Habenaria (Orchidaceae: Orchidinae) from southern Brazil

et al. 2012

View full text Add to dashboard Cite

The pollination process and breeding system of the sympatric Habenaria johannensis, H. macronectar, H. megapotamensis and H. montevidensis was documented for native populations from Rio Grande do Sul, Brazil. All species investigated offer a nectar reward (mean values of total sugars ranging from 18 to 26%) concealed in a spur. Habenaria montevidensis is pollinated by butterflies (Hesperiidae, especially of the genus Urbanus) that carry pollinaria on their eyes; the other three species are pollinated by Sphingidae. Habenaria johannensis is pollinated by the moths Manduca rustica and M. sexta that carry the pollinaria at the base of the proboscis. Habenaria macronectar is pollinated by the moths Eumorpha labrusca and M. cf. lucetius, and these bear pollinaria between the palpi. Habenaria megapotamensis is pollinated by moths of M. cf. lucetius that bear the pollinaria on the proboscis. All species studied are self‐compatible, but pollinator dependent. They also displayed high reproductive success (ranging from 69.48 to 97.40%) and male efficiency factors slightly higher than 1, suggesting that at least one flower was pollinated for each flower acting as pollen donor. At the study sites, the investigated Habenaria spp. are isolated (in terms of pollination) by a set of factors that includes differing floral morphologies, different pollinators and/or different pollinarium placement on the pollinator. © 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, ••, ••–••.

show abstract

Section: Discussionmentioning

confidence: 97%

Pollination biology of four sympatric species of Habenaria (Orchidaceae: Orchidinae) from southern Brazil

et al. 2012

View full text Add to dashboard Cite

show abstract

“…& B.M.Carvalho in Batista et al . () (placed near Clade 18 in Batista et al ., ). Nevertheless, all the above characters, as a whole, allow the diagnosis of the section, and they clearly separate H. section Pentadactylae from the species in the sister group of H. repens (Clade 6 in Batista et al ., ).…”

Section: Taxonomic Treatmentmentioning

confidence: 99%

Molecular phylogenetics and taxonomic revision ofHabenariasectionPentadactylae(Orchidaceae, Orchidinae)

et al. 2014

View full text Add to dashboard Cite

As a step towards a revision of the sectional classification of Neotropical species of Habenaria, we focus here on section Pentadactylae. In its current delimitation, this is the largest of the 14 New World sections and embraces a group of 34 morphologically heterogeneous species. We expanded the sampling of Neotropical species currently placed in this section and performed Bayesian, maximum likelihood and parsimony analyses using nucleotide sequences from one nuclear (internal transcribed spacer, ITS) and three plastid (matK, trnK intron, rps16-trnK) DNA regions. In addition, morphological features of these species were reassessed. Based on our analyses, we propose that Habenaria section Pentadactylae should be recircumscribed to include only seven species: H. pentadactyla (the type species of the section), H. dutrae, H. ekmaniana, H. exaltata, H. henscheniana, H. megapotamensis and H. montevidensis. Thirty-two species previously assigned to the section grouped within unrelated clades and are therefore excluded from the section. There are no unambiguous morphological synapomorphies for the section, but the group can be confidently recircumscribed and identified on the basis of a combination of diagnostic morphological vegetative and floral characters. Morphological floral features in Habenaria montevidensis are distinct from those of other species in the section, probably as a result of a shift to diurnal pollinators. Following a taxonomic revision of the group, H. crassipes is placed under the synonymy of H. exaltata and neotypes are designated for H. crassipes, H. montevidensis and H. recta (= H. ekmaniana). All species in the section live in marshes or wet grasslands from northern Argentina to central Brazil; most species are concentrated in southern Brazil. Most species are probably rare, and five may be threatened according to the World Conservation Union (IUCN) criteria.

show abstract

“…Batista et al 2010;Farinaccio 2002;Farinaccio and Mello-Silva 2004a;Romero 2000;Romero and Goldenberg 1999;Romero and Martins 1999;Roque and Nakajima 2001;Versieux and Wanderley 2008). One of the families deserving mention is Apocynaceae (Farinaccio andMello-Silva 2004b, 2005;Morokawa et al 2013).…”

mentioning

confidence: 99%

<I>Barjonia furlanii</I> (Apocynaceae, Asclepiadoideae), a New Species from the State of Minas Gerais, Brazil, and a Key to Genus

Farinaccio¹

2013

Systematic Botany

View full text Add to dashboard Cite

^This paper provides descriptions and illustrations of a new species, Barjonia furlanii (Asclepiadoideae, Apocynaceae), from Serra da Canastra National Park, in the state of Minas Gerais, Brazil. This species is similar to S. laxa, especially in its frondose thyrsoid inflorescence, compound corona, and linear leaves. It is, however, distinguished from B. laxa by intemodes (up to 4 cm long), peduncles (4.2-5mm long) and much shorter pedicels (4-6 mm long), erect leaves, attenuated at the base, and partial inflorescences that alternate with 2-4 flowers. B. furlanii is proposed for Endangered status under IUCN guidelines (EN B2abiii), and a key to all Barjonia species is included in this study.

show abstract

Three new species of Habenaria (Orchidaceae) from Serra da Canastra, Minas Gerais, Brazil

Cited by 979 publications

References 0 publications

Pollination biology of four sympatric species of Habenaria (Orchidaceae: Orchidinae) from southern Brazil

Pollination biology of four sympatric species of Habenaria (Orchidaceae: Orchidinae) from southern Brazil

Molecular phylogenetics and taxonomic revision ofHabenariasectionPentadactylae(Orchidaceae, Orchidinae)

<I>Barjonia furlanii</I> (Apocynaceae, Asclepiadoideae), a New Species from the State of Minas Gerais, Brazil, and a Key to Genus

Contact Info

Product

Resources

About