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A literature review of the pollination strategies and breeding systems in Oncidiinae orchids Acta Botanica
Castro,Jonas B.; Singer,Rodrigo B..
ABSTRACT Oncidiinae is an exclusively Neotropical orchid subtribe with about 1600 described species and an impressive array of vegetative and floral morphological adaptations. We present the results of a literature survey on the pollination strategies and breeding systems of this orchid subtribe. The flowers are pollinated by a wide range of insects (mostly bees) and, sometimes, hummingbirds. Several genera reward their pollinators with floral resources such as oils, nectar or perfumes. Whereas pollination by oil-gathering bees likely evolved several times within Oncidiinae, exclusive pollination by perfume-gathering male Euglossine bees is likely restricted to a set of closely-related genera. Pollination by food or sexual deception is also present within...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Breeding systems; Deception; Elaiophores; Fruiting success; Nectaries; Oncidiinae; Orchids; Osmophores; Pollination strategies.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400618
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Activated charcoal and graphite for the micropropagation of Cattleya bicolor Lindl. and a orchid double-hybrid ‘BLC Pastoral Innocence’ - doi: 10.4025/actasciagron.v34i2.12257 Agronomy
Prizão, Eliane Cristina; Universidade Estadual de Maringá; Gonçalves, Letícia de Menezes; Universidade Estadual de Maringá; Gutierre, Maria Auxiliadora; Universidade Estadual de Maringá; Mangolin, Claudete Aparecida; Universidade Estadual de Maringá; Machado, Maria de Fátima Pires da Silva; Universidade Estadual de Maringá.
No previous studies have investigated the use of graphite instead of activated charcoal in orchids. In this work, different concentrations of activated charcoal or graphite were added to KC medium to darken the culture medium and stimulate the in vitro propagation of Cattleya bicolor and of a double hybrid orchid (‘BLC Pastoral Innocence’). The seedlings were inoculated on growth regulator-free KC medium; the effects of activated charcoal (0.0, 1.5, 3.0, 4.5, 6.0, and 7.5 g L-1) and graphite (0.0, 1.5, 3.0, 4.5, 6.0, and 7.5 g L-1) concentrations were tested separately. Each flask contained fifteen seedlings, and the experiments had a randomised, two-way factorial design. The two tested variables were culture medium and illumination levels; eleven culture...
Tipo: Laboratory analysis Palavras-chave: Activated charcoal; Graphite; Orchids; Micropropagation.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/12257
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Asymbiotic culture of Cattleya intermedia Graham (Orchidaceae): the influence of macronutrient salts and sucrose concentrations on survival and development of plantlets Acta Botanica
Sasamori,Márcio Hisayuki; Endres Júnior,Delio; Droste,Annette.
ABSTRACTCattleya intermediais an Atlantic Forest species endemic to Brazil that is classed as vulnerable on the list of threatened species. In this study, C. intermedia plantlets were micropropagated in an asymbiotic culture and the influence of different concentrations of sucrose (15, 30, 45 and 60 g L-1, plus a zero sucrose medium) and macronutrient salts (complete Murashige and Skoog (MS) medium and half MS medium (with half-strength macronutrients)) on survival and development of the plantlets was evaluated. In all treatments 100% plantlet survival was achieved. The integrated analysis of height of aerial part, number of leaves per plantlet, fresh mass, number of roots per plantlet and length of the longest root showed that the plantlets exhibited...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic Forest; Carbohydrate; Conservation; In vitro culture; Orchids; Propagation.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300292
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Chromosome studies in Orchidaceae from Argentina Genet. Mol. Biol.
Daviña,Julio Rubén; Grabiele,Mauro; Cerutti,Juan Carlos; Hojsgaard,Diego Hernán; Almada,Rubén Dario; Insaurralde,Irma Stella; Honfi,Ana Isabel.
The center of diversity of Argentinean orchids is in the northeast region of the country. Chromosome numbers and karyotype features of 43 species belonging to 28 genera are presented here. Five chromosome records are the first ones at the genus level; these taxa are Aspidogyne kuckzinskii (2n = 42), Eurystyles actinosophila (2n = 56), Skeptrostachys paraguayensis (2n = 46), Stigmatosema polyaden (2n = 40) and Zygostates alleniana (2n = 54). In addition, a chromosome number is presented for the first time for 15 species: Corymborkis flava (2n = 56), Cyclopogon callophyllus (2n = 28), C. oliganthus (2n = 64), Cyrtopodium hatschbachii (2n = 46), C. palmifrons (2n = 46), Galeandra beyrichii (2n = 54), Habenaria bractescens (2n = 44), Oncidium edwallii (2n =...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome number; Karyotype features; Polyploidy; Karyology; Orchids; South America.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400024
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Comparative anatomy of the absorption roots of terrestrial and epiphytic orchids BABT
Moreira,Ana Sílvia Franco Pinheiro; Isaias,Rosy Mary dos Santos.
The present study compared roots of terrestrial and epiphytic Orchidaceae, analyzing the anatomical characteristics from an ecological point of view. The material was collected at three different sites in Minas Gerais / Brazil and was fixed in FAA. Transverse sections were obtained by freehand sections or from material previously embedded in Paraplast® or Historesin®. The prominent characteristics of the epiphytic group were: significant smaller perimeter, epidermis with 3 or more cell layers, U-thickened exodermal cell walls, O-thickened endodermal cell walls, and a low ratio between the caliber and the number of protoxylem arches. The terrestrial group presented simple or multiseriate epidermis, and exodermis and endodermis with typical Casparian strips....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Orchids; Terrestrial; Epiphytic; Anatomy; Adaptations.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100011
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Comparison of Catasetum bicolor and C. ochraceum (Catasetinae: Orchidaceae) habitat preferences: implications for their conservation Acta Agron. (Palmira)
Alvarado Solano,Diana Patricia; Martínez López,Sergio; Šarapatka,Bořivoj; Otero Ospina,Joel Tupac.
Abstract Family Orchidaceae is widely recognized for its mutualistic relationship with their pollinators, however, the knowledge about the most diverse monocotyledonous group on the planet it is still limited. Here, we recognized the ecological requirements and modeled the habitat preferences for Catasetum bicolor and C. ochraceum (Subfamily: Epidendroideae). We used climatic and bioclimatic data along with species' occurrences records in a) Principal Components Analysis (PCA) to screen for the most influential variables; and, b) a maximum entropy algorithm (Maxent) for habitat suitability modeling. Also, preliminary conservation status and probable priority areas for monitoring and conservation were identified. Both species differed in their habitat...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecological niche; Maxent; Neotropics; Orchids; PCA; Species distribution.
Ano: 2021 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122021000200211
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Dry matter partitioning differences between shoots and roots in two contrasting genotypes of orchids and their relationship with endogenous levels of auxins, cytokinins and abscisic acid Rev. Bras. Fisiol. Veg.
PERES,LÁZARO E. P.; MAJEROWICZ,NIDIA; KERBAUY,GILBERTO B..
Epiphytic orchids have been considered an interesting model for plant development and may have unusual features related to the hormonal control of shoot and root growth. In the present experiment we have studied two genotypes of Catasetum fimbriatum Lindl. (Orchidaceae) with an inverse pattern of shoot and root dry matter accumulation. Whereas the CFC1 genotype directs 60% of dry matter towards the shoot system, this same amount is directed towards the root system in the CFC4 genotype. Differences in the endogenous content of cytokinins, IAA and ABA, as well as differences in IAA conjugation and oxidation in shoots and roots were observed in the two genotypes. These differences were correlated with their dry matter partitioning patterns. Thus, the genotype...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Epiphytes; Development; In vitro culture; Orchids; Plant hormones.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000200007
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EFFECTIVENESS OF POSTHARVEST SOLUTIONS FOR THE CONSERVATION OF CUT Oncidium varicosum (ORCHIDACEAE) INFLORESCENCES Ciência e Agrotecnologia
Mattiuz,Claudia Fabrino Machado; Mattiuz,Ben-Hur; Rodrigues,Teresinha de Jesus Deléo; Marques,Kelly Magalhães; Martins,Ramilo Nogueira.
The orchid Oncidium varicosum is a tropical plant with significant commercial value due to the beauty of its yellow inflorescences. Several authors have observed a reduction in the water content of cut flowers, consequently, wilting and senescence of petals are the main reasons for the termination of the decorative life of cut flowers. In this research, we studied the effects of several chemical compounds on the postharvest life of cut inflorescences of Oncidium varicosum 'Samurai'. These chemicals are as follows: sucrose (5%) plus 8-hidroxiquinoline citrate (8-HQC) (100 mg L-1) plus silver nitrate (AgNO3) (50 mg L-1); sucrose (5%) plus citric acid (75 mg L-1); quaternary ammonia at 30% (50 mg L-1); and sucrose (5%) plus quaternary ammonia at 30% (50 mg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physiology; Orchids; Flowers; Carbohydrates; Carotenoids; Relative water content.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000400315
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Effects of light stress on the growth of the epiphytic orchid Cattleya forbesii Lindl. X Laelia tenebrosa Rolfe Rev. Bras. Bot.
STANCATO,GIULIO C.; MAZZAFERA,PAULO; BUCKERIDGE,MARCOS S..
Considering the performance of CAM epiphytes under high levels of radiation or in shaded environments, with growth rate proportional to light intensity, the objective of this work was to evaluate the effects of long-term light stress on the growth of a Brazilian epiphytic orchid, Cattleya forbesii Lindl. X Laelia tenebrosa Rolfe. Two groups of plants were used in the first experiment, one under 90% (<FONT FACE=Symbol>@</FONT> 1,650 µmol.m-2.s-1) of Photosynthetically Active Radiation (PAR) and the other maintained under 22.5% (<FONT FACE=Symbol>@</FONT> 400 µmol.m-2.s-1). In the second experiment the diffusive resistance, transpiration rate and fluorescence levels were monitored for plants that were under 22.5% of PAR, under 90% and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Photoinhibition; Storage; Orchids; Pseudobulb.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000200011
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Establishing species distributions in large tropical plant genera: insights from twelve new Thai records of Oberonia (Orchidaceae) Naturalis
Bunpha, K.; Pedersen, H.Æ.; Sridith, K..
Establishing species distributions is particularly challenging in large tropical genera of inconspicuous plants. One such genus is Oberonia (Orchidaceae) which we are currently revising for Thailand. When encountering material of a putatively new species, great care has been taken to make a wide geographic search for matching extra-Thai taxa. Against this background, we here record 12 species as new for Thailand: O. dissitiflora, O. evrardii, O. gracilis, O. insectifera, O. lotsyana, O. microphylla, O. orbicularis, O. semifimbriata, O. singalangensis, O. stenophylla, O. suborbicularis, O. wenzelii. Seven records are based (at least in part) on older collections, suggesting that many gaps in currently known species distributions can be filled through...
Tipo: Article / Letter to the editor Palavras-chave: Flora of Thailand; Geographic range; Occurrence; Orchids; Revision; Synonymy; Taxonomy.
Ano: 2013 URL: http://www.repository.naturalis.nl/record/525078
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Longevity of Oncidium varicosum (Orchidaceae) inflorescences treated with 1-methylciclopropene Ciência Rural
Mattiuz,Claudia Fabrino Machado; Mattiuz,Ben-Hur; Rodrigues,Teresinha de Jesus Deléo; Pietro,Júlia de; Martins,Ramilo Nogueira; Grossi,Selma de Fátima.
Oncidium varicosum belongs to Orchidaceae family and nowadays it is commercialized on large scale due to its potential as cut flower. The species distinguishes decoratively in function of the high number of flowers golden yellow that compose its great and delicate inflorescence. The hormone ethylene performs an important function in the processes related with the senescence of cut flowers, and especially in relation to orchids anti-ethylene treatments are recommended to extend the vase life. Among chemicals used today for the postharvest treatment of flowers the 1-methylciclopropene (1-MCP) is an efficient inhibitor of autocatalytic production of ethylene. This research aimed to evaluate the effect of different concentrations of 1-methylciclopropene...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Postharvest; Orchids; Cut flowers; 1-MCP; Ethylene.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000600006
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Markets, mixtures and molecular methods: investigating medicinal plant and edible orchid diversity in Tanzania and Zambia Naturalis
Veldman, S..
Medicinal plants are an important source of primary healthcare for many people in Tanzania. These medicinal plants are harvested from the wild, and increasing commercial trade poses a serious threat to local plant populations. Currently it is unknown which species are traded and in what amounts. Across the southwestern border in Zambia, the traditional dish chikanda has transformed from a niche product to being a mainstream delicacy. One of the main ingredients are wild-harvested orchids, and these have become depleted throughout the country as an effect of the increased trade. It is unclear which orchid species are targeted and might be at risk of overharvesting. The aims of my doctorate are to map harvest and trade of Tanzanian medicinal plants and...
Tipo: Book (monograph) Palavras-chave: DNA barcoding; Africa; Species delimitation; Orchids; Medicinal plants.
Ano: 2018 URL: http://www.repository.naturalis.nl/record/668031
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Orchidaceae in an Atlantic Forest area: floristics and similarity to other Dense Ombrophilous Forest fragments Acta Botanica
Wängler,Marília Suzy; Barberena,Felipe Fajardo Villela Antolin; Lopes,Rosana Conrado.
The Brazilian Atlantic Forest is considered a global hotspot for biodiversity although it is currently threatened and highly fragmented. Orchidaceae in this phytogeographical domain is represented by 148 genera, of which 142 are endemic; Rio de Janeiro State contains approximately one third of all Brazilian orchid species. The Wildlife Protection Zone of the Palmares Environmental Protection Area (ZVS da APA Palmares) is located in the municipality of Paty do Alferes in Rio de Janeiro State and forms a mosaic of Dense Ombrophilous Forest fragments together with other conservation areas in the state. We surveyed Orchidaceae at 12 collection sites between July 2010 and February 2012 and analyzed floristic similarities between the collection sites and between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asparagales; Atlantic Forest; Conservation; Orchids; Taxonomy.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000100082
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Orchidaceae of the Grumari restinga: floristic and similarity among restingas in Rio de Janeiro state, Brazil Acta Botanica
Moreira,Marina Muniz; Barberena,Felipe Fajardo Villela Antolin; Lopes,Rosana Conrado.
Orchidaceae is one of the largest and most diverse plant families in the world. The number of floristic studies of this family in Rio de Janeiro state, Brazil, has increased significantly in recent years. However, only a few such studies have been conducted in areas of restinga vegetation and none of those have examined the similarity, in terms of orchid diversity, among such areas. The present study sought to improve our knowledge of the Orchidaceae diversity occurring in Grumari restinga, as well to compare the diversity of orchids among Grumari and other restinga areas using cluster analysis. We found 15 genera and 19 species. Cluster analysis demonstrated that restingas located on islands are considerably different from those on the mainland, and no...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conservation; Orchids; Taxonomy.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000300003
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Pre-treatments effect on the tetrazolium test on Epidendrum barbaricum Hágsater &amp; Dodson seeds Acta Agron. (Palmira)
Salazar Mercado,Seir Antonio; Botello Delgado,Edison Alexander; Quintero Caleño,Jesús David.
Abstract Orchids are affected by several factors that impair their spreading, which is necessary to know the viability of their seeds. The aim of this research was to determine the most suitable preconditioning treatment to potentiate the tetrazolium test in Epidendrum barbaricum seeds. Initially, the mature capsules were collected near the city of Pasto in the Department of Narino (Colombia), and seeds were obtained. Subsequently, the seeds were submitted to four pretreatments: immersion in distilled water, 1% hypochlorite, 10% alcohol and 10% sucrose. Seeds were then rinsed with distilled water and exposed to two concentrations of 2,3,5-trifenyl tetrazolium chloride (0.25%, 1%) and different exposure times (6, 12, 24, and 48 hours). To perform the tests,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capsules; Germinative capacity; Orchids; Seeds quality; Sodium hypochlorite.
Ano: 2019 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122019000400306
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Propagation of Noble Dendrobium (Dendrobium nobile Lindl.) by cutting - doi: 10.4025/actasciagron.v35i4.15198 Agronomy
Venturieri, Giorgini Augusto; UFSC - Universidade Federal de Santa Catarina; Pickscius, Fabiano José; Centrais de Abastecimento do Estado de Santa Catarina S.A..
The Noble Dendrobium orchid (Dendrobium nobile Lindl.) is an ornamental species usually propagated by leaf axillary shoots called “Keikes”, but cutting is possible although, many do not produce leaves or roots and eventually rot. To increase the proportion of successful stalk cuttings, two substrates were evaluated in the present study (gravel and a 1:1 tree-fern shredded trunk:palm seed mixture) in interaction with the application of nitrogen fertilizer (urea 2 g L-1) and a commercial leaf fertilizer made from kelp seaweed (“Kelpak” a 2 mL L-1). Only water was applied for the control treatment. The evaluated parameters included the proportion of successful cuttings, vigor, the proportion of rotten stalks, the number of roots/plant and root length/per...
Palavras-chave: 5.01.04.00.4 Kelpak; Orchids; Rot; Urea 5.01.03.04-0.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15198
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Response of Epidendrum Ibaguense (orchidaceae) to the application of lime rates to the pot Rev. Bras. Ciênc. Solo
Rodrigues,Donizetti Tomaz; Novais,Roberto Ferreira; Alvarez V,Víctor Hugo; Dias,José Maria Moreira; Villani,Ecila Mercês de Albuquerque.
In the best cultivation methods of orchids, in particular of the genus Phalaenopsis, liming is a common practice. The objective of this study was to evaluate the influence of lime rates (0.0; 1.0; 2.0; 3.0; 4.0; and 5.0 g dm-3 of substrate) applied to the cultivation substrate (xaxim) on the growth of Epidendrum ibaguense seedlings. In a greenhouse, 1-L plastic pots filled with 0.8 dm³ of xaxim were irrigated such that no leachate was lost during the experiment. N, P, K, Ca, Mg, S, Fe, Zn, B, and Mn contents in roots, stems and leaves were measured. Leachate was collected by applying a sufficient water volume to obtain 25 mL from each pot. Fourteen days after lime application of 3 g dm-3, the pH of the collected leachate reached values above 7 and a value...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Orchids; Nutrition; Liming; Floriculture.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300021
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Revision of Coelogyne section Fuliginosae (Orchidaceae) Naturalis
Pelser, P.B.; Gravendeel, B.; Vogel, E.F. de.
Section Fuliginosae Pfitzer & Kraenzl. of the genus Coelogyne Lindl. is revised. With the help of a pollen study, principal component and cluster analyses with morphological characters and a survey of some additional data, two species are recognized (C. fimbriata and C. triplicatula), including one dubious variety (C. fimbriata var. acuminata). Eleven names are reduced to synonymy. Three species formerly included in sect. Fuliginosae by several authors are excluded ( (C. micrantha, C. treutleri and C. schilleriana).
Tipo: Article / Letter to the editor Palavras-chave: Coelogyne sect. Fuliginosae; Orchids; Phenetics; Pollinia; Systematics.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/525407
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Revision of Coelogyne section Speciosae (Orchidaceae) Naturalis
Gravendeel, B.; Vogel, E.F. de.
Section Speciosae Pfitzer & Kraenzl. of the genus Coelogyne Lindl. is revised. Sixteen species are recognized, including one new ( C. tommii) and one dubious species ( (C. dichroantha). Three former varieties are raised to subspecies level ( C. speciosa subsp. speciosa, subsp. incarnata and subsp. fimbriata). Two species formerly included in sect. Speciosae by several authors are excluded (C. eberhardtii and C. lawrenceana).
Tipo: Article / Letter to the editor Palavras-chave: Coelogyne sect. Speciosae; Orchids; Systematics.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/524978
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Revision of Coelogyne section Verrucosae (Orchidaceae): a new sectional delimitation based on morphological and molecular evidence Naturalis
Sierra, S.E.C.; Gravendeel, B.; Vogel, E.F. de.
Section Verrucosae Pfitzer & Kraenzl. of the genus Coelogyne Lindl. is revised using morphological and molecular data. Eight species are recognized, including two new ones ( C. marthae and C. verrucosa). One name is reduced to synonymy. Four species formerly included by several authors in sect. Verrucosae (C. brachyptera, C. papillosa, C. parishii and C. virescens) are excluded. A total evidence analysis of morphological characters and ITS and matK sequence data supports the monophyly of the section as here recognized. Coelogyne virescens (sect. Brachypterae) is identified as nearest neighbour to the species of sect. Verrucosae. The number of sterile bracts on the rhachis and the shape of the ornamentation on the epichile appear to be phylogenetically...
Tipo: Article / Letter to the editor Palavras-chave: Coelogyne sect. Verrucosae; MatK; Orchids; Phylogeny; Ribosomal ITS; Systematics.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/524865
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