Orchid Research Center

The Chapada Diamantina is located in the northern region of the Espinhaço Range, and its main vegetation type is the "campo rupestre", but other vegetational types also occur such as gallery forests, cerrado and caatinga, and the whole region presents high endemism. Bulbophyllum Thouars is the largest genus of Orchidaceae, with nearly 1.200 species. Fifty-eight Bulbophyllum species are recognized from Brazil, and only five of them were until recently reported for the Bahia state. In this study we present a survey of the Bulbophyllum species occurring in the Chapada Diamantina, based on herbarium and field collections. We found 12 Bulbophyllum species and one natural hybrid in the Chapada Diamantina, eight of which are new occurrences for the state. Bulbophyllum epiphytum Barb. Rodr., B. laciniatum (Barb. Rodr.) Cogn., and B. napellii Lindl. are epiphytic; B. involutum Borba, Semir & F. Barros, B. mentosum Barb. Rodr., B. roraimense Rolfe, B. weddellii (Lindl.) Rchb. f., and B. ×cipoense Borba & Semir occur exclusively as rupicolous; and B. chloropterum Rchb. f., B. cribbianum Toscano, B. ipanemense Hoehne, B. manarae Foldats and B. plumosum (Barb. Rodr.) Cogn. present facultative habit. Bulbophyllum ipanemense is the most abundant species of the genus in the Chapada Diamantina, and the populations of this species in Bahia present several morphological differences in relation to the populations of Southeastern region. B. manarae and B. roraimense, formerly considered as endemic to Venezuela, are mentioned for the first time to Brazil, strengthening the hypothesis of a close relationship between the flora of that country and the Chapada Diamantina.

During preparation of generic taxonomic treatments of the Pleurothallidinae of Brazil, the authors examined critical material and literature of several species. Their morphologies and identities were elucidated. In this article we focus on the identities of Pabstiella campestris (Barb. Rodr.) Luer and Pabstiella pleurothalloides (Cogn.) Luer, and description of a new species, Pabstiella varellae, previously confused with Pabstiella campestris. Pabstiella mouraeoides (Hoehne) Luer and Pleurothallis pfisteri Braem & Braas are also discussed. Species are treated and illustrated in alphabetical order. Pabstiella campestris (Barb.Rodr.) Luer, Monogr. Syst. Bot. Missouri Bot. Gard. 112: 119, 2007. Fig. 1-6. Basionym: Pleurothallis campestris Barb.

A taxonomic revision of the genus Phymatidium Lindl. is presented. Ten species and two varieties are recognised. One species, P. glaziovii Toscano, and one variety, P. delicatum var. curvisepalum Toscano, are newly described. A key to species and varieties is presented. Each species and variety is described and illustrated, and history and synonymy discussed. Lectotype: Phymatidium delicatum Lindl. (designated by Toscano de Brito 2001).

Two new Brazilian species of the orchid genus Acianthera, Acianthera calopedilon and Acianthera cephalopodiglossa, are described and illustrated. The identities of Acianthera bidentula, Acianthera saundersiana, and Acianthera serpentula are discussed. Acianthera velteniana, recently described for Espírito Santo, is placed in the synonymy of Acianthera bidentula. An epitype is selected for Pleurothallis saundersiana and a lectotype for Pleurothallis serpentula. Updated synonymy lists are provided for the taxa treated in the article.

One new species in the genus Acianthera, A. imitator, is described and illustrated. Sixteen species are proposed as synonyms. They are listed in alphabetical order: Acianthera gradeae as synonym of A. agathophylla; A. spilantha as synonym of A. breviflora; A. antennata as synonym of A. gracilisepala; A. dichroa as synomym of A. strupifolia; Anathallis crebrifolia, A. montipelladensis, and
A. ourobranquensis as synonyms of A. aristulata; A. liparanges as a synomym of A. heterophylla; A. bolsanelloi, A. githaginea, and A. nectarifera as synonyms of A. lobiserrata; A. limbata and A. marginata as synonyms of A. muscoidea; A. longiglossa as synonym of A. paranaensis; Lankesteriana gehrtii as synonym of L. caudatipetala, and Specklinia rubidantha as synonym of Lankesteriana
imberbis. Correct provenance and habitat information are provided for the type collection of the recently described Anathallis johnsonii. This species is herein formally recorded for Brazil. Lectotypes are selected for seven species: Anathallis heterophylla, A. nectarifera,
Lepanthes crebrifolia, Pleurothallis gracilisepala, P. microgemma, P. paranaensis, and P. spilantha, and an epitype is selected for Pleurothallis paranaensis. Illustrations and taxonomic discussions are also provided.

We discuss a group of four species from the Venezuelan Guayana, two of them closely related to Anathallis nanifolia (based
on Pleurothallis nanifolia). These two species, Pleurothallis deborana and P. pemonum, were erroneously placed in the synonymy of
Anathallis holstii (based on Pleurothallis holstii). We propose new combinations in Anathallis for these two species, discuss the current
status of all four species, and provide a key to distinguish them.

Two new species, Pabstiella calimanii and Pabstiella recurviloba, are described and illustrated. One new combination, Pabstiella deltoglossa, is proposed. Eight species and one variety are proposed as synonyms. They are listed in alphabetical order: Pabstiella avenacea, P. leucosepala and Pleurothallis mathildae as synonyms of Pabstiella elegantula; Pabstiella cipoensis as a synonym of P. pristeoglossa; Pleurothallis magnicalcarata and Pabstiella mentigera as synonyms of P. calcarata; Pabstiella pterophora and Pleurothallis pterophora var. minor as synonyms of Pabstiella leucopyramis, and Pabstiella podoglossa as a synonym of P. versicolor. Lectotypes are selected for four species: Pleurothallis avenacea, P. mentigera, P. pristeoglossa and P. pterophora. An epitype is selected for Pleurothallis pristeoglossa. Illustrations and taxonomic discussions are also provided.

The genus Centroglossa consists of six species, all endemic to the Atlantic Forest in southern and southeastern Brazil. It was known to occur in the State of Paraná based on three specimens of C. tripollinica collected by the Swedish botanist Per Karl Hjalmar Dusén at the beginning of last century. During recent fieldwork in Brazil, this species was rediscovered in Paraná. The aim of this article is to confirm the presence of C. tripollinica in the State of Paraná, provide a detailed description and illustrations of this species, and discuss its conservation status. A lectotype is designated for C. tripollinica.

Resumo Anathallis compreende cerca de 165 espécies distribuídas no Neotrópico. Através da análise de material depositado em herbários nacionais e estrangeiros e da realização de trabalho de campo, 17 espécies foram identificadas para o estado do Paraná e são atribuídas a quatro grupos informais: “Acuminatae” (Anathallis rubens e A. sclerophylla), “Alatae” (A. citrina, A. dryadum, A. ferdinandiana, A. gert-hatschbachii, A. heterophylla e A. obovata), “Margaritifera” (A. linearifolia e A. piratiningana) e “Panmorphia” (A. adenochila, A. aristulata, A. bleyensis, A. corticicola, A. microphyta, A. modesta e A. vitorinoi). O gênero ocorre nas diferentes fitofisionomias do estado, sobretudo no Primeiro Planalto, na Floresta Ombrófila Mista e na Estepe Gramíneo Lenhosa. Segundo os critérios da IUCN, a maioria enquadra-se na categoria “Em Perigo”. Quatro sinonímias são aqui propostas: Anathallis kleinii é considerada sinônimo de A. corticicola, A. microblephara de A. modesta, A. pabstii de ...