Edlley Pessoa

Flora da Usina São José, Igarassu, Pernambuco: Orchidaceae

Orchidaceae was recently pointed as the most representative family in Atlantic forest. Based on the lack of data and the fragmentation with lost of diversity, this paper provides a checklist of the orchids in some fragments of Atlantic Rainforest in Usina Sao Jose (USJ), Pernambuco, Brazil. The study area includes six forest fragments in Igarassu, Pernambuco. Fieldwork was carried out from December/2008 to March/2010. The vouchers were deposited at UFP herbarium. Orchidaceae is represented by 27 species and 19 genera which Epidendrum L. (4 spp.) and Scaphyglottis Poepp. & Endl.(3 spp.) were the richest in number of species. This work increases 20 spp. to that recorded for USJ in previous checklist. Three species are recorded here for the first time for the Atlantic rainflorest, and one is a new record to Northeastern Brazil. Cattleya granulosa Lindl. and Zygostates bradei (Schltr.) Garay are considered threatened. The Piedade remain is noteworthy for having 26 spp., which is a RPPN. The data shows the importance of the area to conservation of the biodiversity in the State.

A new Epidendrum (Laeliinae-Orchidaceae) from the Atlantic Forest of northeastern Brazil: Evidence from morphology and cytogenetics

A new epiphytic species, Epidendrum sanchezii, is described from northeastern Brazil. The new species grows in the montane Atlantic forest of the states of Ceará and Pernambuco. It belongs to the E. difforme complex and is morphologically similar to E. angustatum, but the new species differs because it has smaller flowers, 7-veined sepals, a lip with a cuspidate apex, and a column that is strongly sigmoid. A karyological description of the new species is presented, including the pattern of CMA/DAPI bands, and this is compared with E. campaccii. A key is provided to distinguish species of the E. difforme complex in northeastern Brazil.ResumoUma nova espécie epífita Epidendrum sanchezii é descrita para a região Nordeste do Brasil, para a Floresta Atlântica montana dos estados do Ceará e Pernambuco. Esta é relacionada ao complexo E. difforme, e é morfologicamente semelhante com E. angustatum, mas se diferencia por flores menores, sépalas com 7 vênulas, labelo com ápice cuspidado e coluna fortemente sigmóide. Adicionalmente é apresentada uma descrição cariológica da espécie nova, comparando-a com E. campaccii, incluindo o padrão de bandas CMA/DAPI e uma chave de identificação para as espécies relacionadas do Nordeste do Brasil.

Flora da Usina São José, Igarassu, Pernambuco: Zingiberales

Resumo Zingiberales esta representada na flora brasileira por cerca de 300 especies, ocorrendo na regiao Nordeste aproximadamente 100 especies. O conhecimento sobre a ordem na Floresta Atlântica do estado de Pernambuco e incipiente, tendo esse estudo o objetivo de inventariar e caracterizar morfologicamente as especies das Zingiberales da Usina Sao Jose, localizada em Igarassu. As coletas foram realizadas em oito expedicoes (entre Novembro de 2013 a Dezembro de 2014), alem de visitas aos herbarios HST, IPA, PEUFR e UFP. Na area de estudo foram encontradas uma especie de Costaceae, tres de Heliconiaceae, e sete de Marantaceae. Heliconia episcopalis e Maranta subterranea sao citadas como novos registros para o estado. Sao apresentadas chave de identificacao, descricoes, comentarios e ilustracoes. Palavras-chave: Costaceae, Floresta Atlântica, Floristica, Heliconiaceae, Marantaceae. Abstract Zingiberales is represented in the Brazilian flora by almost 300 species, of which about 100 occur in the Northeast Region of the country. Zingiberales is poorly known in the Atlantic Forest of the state of Pernambuco and this study provides a taxonomic survey of the species found in the forest fragments of Usina Sao Jose, Igarassu. The field work was carried out in eight expeditions (from November 2013 to December 2014), as well as visits to herbaria: HST, IPA, PEUFR and UFP. In the studied area were found one species of Costaceae, three of Heliconiaceae and seven of Marantaceae. Heliconia episcopalis and Maranta subterranea are new records to the state. Identification key, descriptions, comments and illustrations are presented. Key words: Costaceae, Atlantic Forest, Floristic, Heliconiaceae, Marantaceae.

Taxonomic Revision of Campylocentrum (Orchidaceae—Vandeae—Angraecinae): Species with Terete Leaves

Abstract This study has the purpose of reviewing the species of Campylocentrum with terete leaves. While 15 names have been proposed in the group, here we recognize only six previously described species. We also describe a seventh, new species, C. labiakii, which is endemic to the Brazilian state of Espírito Santo. Finally, this study also provides typifications, complete synonymies, conservation statuses, complete descriptions, distribution maps, and an identification key to the species in question.

The Smallest Angraecoid Species from the Neotropics: A New Campylocentrum (Orchidaceae) from a Brazilian Subtropical Forest

Abstract Campylocentrum insulare is a new species of Campylocentrum section Dendrophyllopsis from Santa Catarina, southern Brazil, a group of species characterised by the aphyllous condition. It is the smallest species known from this subtribe in the Neotropics, and is morphologically related to species of the Campylocentrum fasciola complex. It differs by its small size, an inflorescence and ovary that are minutely pubescent, a lip that is distinctly three-lobed, and a conic spur. A distribution map, illustrations, and an identification key that includes species of this genus from southern Brazil are provided.

Campylocentrum brevifolium (Lindl.) E. M. Pessoa & M. Alves, a neglected and critically endangered orchid from the Atlantic Forest of Brazil

SummaryNew morphological, ecological and geographical data support the recognition of Campylocentrum brevifolium as a distinct species. This study aims to provide a nomenclatural update including a new combination and typifications, discuss its morphological affinities to allied Brazilian species (C. crassirhizum, C. micranthum and C. pauloense), and provide the conservation status of the threatened species. It also includes descriptions, illustrations, distribution maps and an identification key.

A new species and a new combination in Stelis (Pleurothallidinae-Orchidaceae) from South America

Stelis duckei, of the Crocodeilanthe group, is described from the state of Ceará, Brazil. The new species is morphologically similar to S. speciosa, but can be distinguished by its longer ramicauls, wider leaves, and obtuse lip with a ridge-like callus at the base. The new combination Stelis speciosa is also provided here.ResumoUma nova espécie de Stelis s.l. do grupo de Crocodeilanthe,S. duckei, é descrita para o estado do Ceará, Brazil. A nova espécie é morfologicamente relacionada a S. speciosa, porém é distinta pelo ramicaule mais longo, folhas mais largas e labelo obtuso com um calo em forma de crista na base. Uma nova combinação em Stelis, S. speciosa, é também apresentada.

The odd roots of Campylocentrum (Angraeciinae-Orchidaceae): an anatomical study of its morphologically variable roots

Although some anatomical studies have been performed in Angraecinae, knowledge about the anatomy of the genus Campylocentrum is as yet incipient. The aim of this study is to anatomically characterize the structure of the different kinds of roots in the genus. Roots from 12 species were analyzed, including all the morphological variation in the genus (smooth and granulose surface). The leafless species are characterized by endovelamen, exodermal and endodermal cell walls thicker than in the leafy species. The species with terete leaves can be split in two groups: one constituting C. poeppigii, whose roots have a granulose surface produced by numerous unicellular, absorbent hairs; the second formed by six species from the Atlantic Forest. In this second group, the same granulose root appearance is produced by tufts of epivelamen in addition to the unicellular, absorbent root hairs. The other species in the genus, with conduplicate leaves, do not present a pattern for grouping. Some of them, such as C. serranum and C. micranthum, share a similar structure with the leafless species, but with thinner exodermal and endodermal cell walls. Other species, such as C. crassirhizum and C. jamaicense, are the only ones in the genus with ○-thickened cells in the exodermis.

Serra do Urubu, a biodiversity hot-spot for angiosperms in the northern Atlantic Forest (Pernambuco, Brazil)

A list of angiosperms from Serra do Urubu, a montane forest area in the state of Pernambuco, is here provided. Based on 14 botanical expeditions and material deposited in herbaria, 832 taxa belonging to 442 genera and 118 families have been recorded in this area, with about 90% of the taxa identified to species level. The richest families are Orchidaceae (86 spp.), Fabaceae (51 spp.) and Rubiaceae (42 spp.). Miconia and Solanum (14 spp. each), and Psychotria (13 spp.) are the richest genera. About 15% of the recorded species are endemic to the Atlantic Forest, and another 10% are disjunct between this area and the Amazon Rainforest. The results indicate that the Serra do Urubu is one of the richest areas in terms of number of species of the Atlantic Forest in the Northeast, and corroborates the Pernambuco Endemism Center.

A new whitish flowered Epidendrum (Laeliinae-Orchidaceae) from the Atlantic Forest of southeastern Brazil

Although several proposals for an infrageneric classification of Epidendrum have been proposed, none is congruent with the most recent molecular analysis. One of the known informal groups proposed in the genus, the “Arbuscula group,” is characterized by an upright sympodial habit in which successive new stems emerge internodally from the leaf sheath and a few (2–4) leaves are aggregated at the apex of each stem. Four species from this group have been recorded in Brazil; these could be called the “E. proligerum complex”, which is characterized by an inflated cuniculus, forming a vesicle in the ventral portion of the pedicellate ovary. A fifth species from this group with whitish flowers, herein described as E. niveum, was found in the Atlantic Forest of São Paulo state, Brazil. It is similar to E. proligerum but differs by its thinner stems; whitish flowers; 7–veined sepals; patent petals, that are 5-veined and laterally strongly revolute lip. It is illustrated and its affinities with allied species are discussed.