Santiago Ortiz - Academia.edu (original) (raw)

Books by Santiago Ortiz

Research paper thumbnail of Ciudadanías Emergentes

El libro recopila experiencias de desarrollo local y democracia participativa en Ecuador

Papers by Santiago Ortiz

Research paper thumbnail of Lucio o la nostalgia

Íconos - Revista de Ciencias Sociales, 2013

Research paper thumbnail of Marcha por el agua, la vida y la dignidad de los pueblos

Letras Verdes. Revista Latinoamericana de Estudios Socioambientales, 2016

Este artículo da cuenta de la marcha que se realiza del 8 al 21 de marzo de 2012, a través de di... more Este artículo da cuenta de la marcha que se realiza del 8 al 21 de marzo de 2012, a través de diez provincias de Ecuador, organizada por actores indígenas, pobladores urbanos y gobiernos regionales que luchaban por el agua y contra la minería, en el marco del gobierno de la Revolución Ciudadana. Se indaga sobre si la marcha logra posicionar en el escenario político la crítica a la producción minera y si constituye un momento de inflexión del ciclo de reflujo que vivieron los movimientos sociales desde principios de siglo. La respuesta es negativa a la primera pregunta y respecto a la segunda plantea que no se da tanto una inflexión como una transformación en la naturaleza de los movimientos sociales. El artículo resume un estudio que examina fuentes documentales y material audiovisual, está sustentado en entrevistas a medio centenar de informantes calificados y en el análisis del discurso del presidente Correa; asume el enfoque del análisis de demandas y repertorios, inspirad...

Research paper thumbnail of Campesinado y nación. La construcción de México y Perú postcoloniales (Reseñas)

Íconos - Revista de Ciencias Sociales, 2013

Íconos, Revista de Ciencias Sociales es una publicación de Flacso-Ecuador. Fue fundada en 1997 co... more Íconos, Revista de Ciencias Sociales es una publicación de Flacso-Ecuador. Fue fundada en 1997 con el fin de estimular una reflexión crítica desde las ciencias sociales sobre temas de debate social, político, cultural y económico del país, la región andina y el mundo en general. La revista está dirigida a la comunidad científica y a quienes se interesen por conocer, ampliar y profundizar, desde perspectivas académicas, estos temas. Íconos se publica cuatrimestralmente en los meses de enero, mayo y septiembre. Para la selección de artículos se utiliza un arbitraje bajo el sistema de doble ciego ipeer review). Indexacián Íconos está incluida en los siguientes índices científicos: Sociological Abstracrs, Ulrich's, Hispanic American Periodical Index (HAPI), Thornpson Gale (Informe Académico), EBSCO-Fuente Académica, Latindex-Catálogo, REDALyC (Red de Revistas Científicas de América Latina y el Caribe) y CLASE (Citas Latinoamericanas en Ciencias Sociales). Iconos On Line Los contenidos de Íconos son accesibles on fine en texto completo a través de los portales de REDALyC (www.redalyc.org), CLACSO (www.clacso.org.ar/bibliotecalrevistas). Tecnociencia (Consejo Superior de Investigación Científica de España), DOAJ (www.doaj.org), FLACSO-Ecuador (www.flacso.org.ec/htmlliconos.html). Los artículos que se publican en la revista son de responsabilidad exclusiva de sus autores; no reflejan necesariamente el pensamiento de Íconos. Se autoriza la reproducción total o parcial de los contenidos siempre que se cite expresamente como fuente a Íconos,

Research paper thumbnail of Hyacinthoides italica" (L.) Rothm. en territorio español

Research paper thumbnail of Living on the edge: timing of Rand Flora disjunctions congruent with ongoing aridification in Africa

Frontiers in Genetics, 2015

The Rand Flora is a well-known floristic pattern in which unrelated plant lineages show similar d... more The Rand Flora is a well-known floristic pattern in which unrelated plant lineages show similar disjunct distributions in the continental margins of Africa and adjacent islands-Macaronesia-northwest Africa, Horn of Africa-Southern Arabia, Eastern Africa, and Southern Africa. These lineages are now separated by environmental barriers such as the arid regions of the Sahara and Kalahari Deserts or the tropical lowlands of Central Africa. Alternative explanations for the Rand Flora pattern range from vicariance and climate-driven extinction of a widespread pan-African flora to independent dispersal events and speciation in situ. To provide a temporal framework for this pattern, we used published data from nuclear and chloroplast DNA to estimate the age of disjunction of 17 lineages that span 12 families and nine orders of angiosperms. We further used these estimates to infer diversification rates for Rand Flora disjunct clades in relation to their higher-level encompassing lineages. Our results indicate that most disjunctions fall within the Miocene and Pliocene periods, coinciding with the onset of a major aridification trend, still ongoing, in Africa. Age of disjunctions seemed to be related to the climatic affinities of each Rand Flora lineage, with sub-humid taxa dated earlier (e.g., Sideroxylon) and those with more xeric affinities (e.g., Campylanthus) diverging later. We did not find support for significant decreases in diversification rates in most groups, with the exception of older subtropical lineages (e.g., Sideroxylon, Hypericum, or Canarina), but some lineages (e.g., Cicer, Campylanthus) showed a long temporal gap between stem and crown ages, suggestive of extinction. In all, the Rand Flora pattern seems to fit the definition of biogeographic pseudocongruence, with the pattern arising at different times in response to the increasing aridity of the African continent, with interspersed periods of humidity allowing range expansions.

Research paper thumbnail of A contribution to the knowledge of exine ultrastructure in subtribe Anisopappinae ( Athroismeae, Asteraceae )

Research paper thumbnail of An Unusual Fat-Containing Presacral Tumor in an Elderly Patient

Case Reports in Radiology, 2014

The authors present a case of a presacral myelolipoma diagnosed in an 84-year-old male patient wi... more The authors present a case of a presacral myelolipoma diagnosed in an 84-year-old male patient with longstanding pelvic pain and past medical history of bladder cancer. Pelvic computed tomography (CT) revealed a well-encapsulated and lobulated presacral mass, with mixed fat and soft-tissue attenuation. Magnetic resonance (MR) imaging provided further confirmation of macroscopic intralesional fat and excluded either adjacent bone invasion or bladder cancer recurrence. A presacral myelolipoma was suspected based on imaging findings, with liposarcoma and teratoma having also been considered for the differential diagnosis. The histological confirmation of the tumor was only attained postoperatively. This case report alerts to the possible presacral location of myelolipomas, which should be considered for every fat-containing lesion detected in this region. The main clinical, imaging, and differential diagnoses of this entity are reviewed in this paper.

Research paper thumbnail of Diseño y puesta en marcha de negocios asociativos en la cadena de la papa: Villa Pinzón, provincia de Almeidas, Cundinamarca

Las iniciativas para conformar grupos asociativos de productores de papa en la provincia de Almei... more Las iniciativas para conformar grupos asociativos de productores de papa en la provincia de Almeidas, se han desarrollado bajo la acción estatal. Esta actividad se encuentra muy limitada en la provincia, donde sólo existen tres asociaciones empresariales activas: Villapapa, la SAT Provilla y la SAT Villanorte. Pese a la resistencia al trabajo asociativo, se lograron determinar algunos negocios, en los cuales los pequeños productores que constituyen el mayor porcentaje en la región, estarían dispuestos a establecer coaliciones. Así mismo, se logró establecer que trabajando en forma asociada se obtienen mayores ganancias.

Research paper thumbnail of Scilla merinoi (Liliaceae), a new species from Galicia, northwestern Iberian Peninsula

Nordic Journal of Botany, 1993

Research paper thumbnail of Two new species of Dicoma (Asteraceae) from Somalia and Ethiopia

Nordic Journal of Botany, 1996

Oubiiia, J. R. 1996. Two new species of Dicoma (Asteraceae) from Somalia and Ethiopia. -Nord. J. ... more Oubiiia, J. R. 1996. Two new species of Dicoma (Asteraceae) from Somalia and Ethiopia. -Nord. J. Bot. 16: 277-281. Copenhagen. ISSN 0107-055X. Two new species of the genus Dicoma, D. popeana from Somalia and D. aethiopica from Ethiopia, both of the section Psilocoma, are described and illustrated. The two species are distinguished from D. anomala and other similar taxa by a morphologic diagnostic key.

Research paper thumbnail of The infraspecific taxa of Pleiotaxis huillensis (Mutisieae, Asteraceae)

Nordic Journal of Botany, 1999

Oubitia, J. 1999. The infraspecific taxa of Pleiotaxis huillensis (Mutisieae, Asteraceae). -Nord.... more Oubitia, J. 1999. The infraspecific taxa of Pleiotaxis huillensis (Mutisieae, Asteraceae). -Nord. J. Bot. 19: 23-26. Copenhagen. ISSN 0107-055X.

Research paper thumbnail of A new species of Dicoma (Asteraceae-Mutisieae) from Swaziland

Nordic Journal of Botany, 2000

A new species, Dicoma swazilandica, belonging to the tribe Mutisieae (Asteraceae) is described an... more A new species, Dicoma swazilandica, belonging to the tribe Mutisieae (Asteraceae) is described and illustrated. Differences between the new species and D. anomaia, the most similar species, are listed.

Research paper thumbnail of A new species of Anisopappus (Asteraceae, Inuleae) and its phylogenetic relationships within the genus

Nordic Journal of Botany, 2001

. A new species of Anisopappus (Asteraceae, Inuleae) and its phylogenetic relationships within th... more . A new species of Anisopappus (Asteraceae, Inuleae) and its phylogenetic relationships within the genus. -Nord. J. Bot. 21: 55-62. Copenhagen. ISSN 0107-055X. A new species of the genus Anisopappus (Asteraceae, Inuleae) from Angola, A . fruticosus, is described. The principal differences with respect to A . chinensis are discussed, and phylogenetic relationships with the other species of the genus are investigated by means of a cladistic analysis using morphological characters.

Research paper thumbnail of Effects of infliximab in the treatment of refractory posterior uveitis of Behçet’s disease after withdrawal of infusions

International Ophthalmology, 2010

To determine the efficacy of infliximab treatment in refractory posterior uveitis in Behçet&a... more To determine the efficacy of infliximab treatment in refractory posterior uveitis in Behçet's disease after withdrawal of infusions. Four patients with posterior uveitis secondary to Behçet's disease were treated with infliximab until complete remission and were followed after withdrawal of infusions. Intra-ocular inflammation was assessed using the binocular indirect ophthalmoscopy score, best-corrected visual acuity (BCVA) and foveal thickness measured by optic coherence tomography (OCT). All the patients included in the study were treated with infliximab for a minimum of 12 months and were in complete remission. None of the patients were taking steroids or immunosuppressants. Main follow-up after withdrawal of infusions was 7.5 months. Two out of four patients (50%) maintained complete remission of posterior uveitis. BCVA was stable in seven eyes. OCT showed worsening in macular edema in the two eyes of the patients with reactivation. Infliximab is an efficient long-term treatment for refractory posterior uveitis. Repeated infusions are required to maintain long-term remission which may be sustained on discontinuation of the drug.

Research paper thumbnail of Intravitreal bevacizumab as initial treatment for choroidal neovascularization associated with presumed ocular histoplasmosis syndrome

Graefe's Archive for Clinical and Experimental Ophthalmology, 2007

To report a case of juxtafoveal choroidal neovascularization in a patient with presumed ocular hi... more To report a case of juxtafoveal choroidal neovascularization in a patient with presumed ocular histoplasmosis syndrome (POHS) who was treated with intravitreal injection of bevacizumab (Avastin) as initial treatment. A 23-year-old woman with POHS presented with sudden dimness of vision and metamorphopsia in the right eye. The patient was examined with ophthalmoscopy, fluorescein angiography, and optical coherence tomography (OCT). Fundus examination, fluorescein angiography, and OCT of the right eye revealed a juxtafoveal choroidal neovascularization. Intravitreal injection of bevacizumab was performed with a postoperative improvement of visual acuity and resolution of the distortion. This case report describes a case of juxtafoveal choroidal neovascularization associated with POHS that responded remarkably well to intravitreal injection of bevacizumab.

Research paper thumbnail of A new species of Dicoma Cass. (Asteraceae: Mutisieae) from Namibia

Botanical Journal of the Linnean Society, 2002

During studies of the genus Dicoma (Asteraceae: Mutisieae), and specifically of the material coll... more During studies of the genus Dicoma (Asteraceae: Mutisieae), and specifically of the material collected by Dinter in Namibia, we have found a new species named Dicoma obconica. This species has previously been misinterpreted as D. picta (Thunb.) Druce. We present a description with illustrations, and discuss relationships with D. picta and with D. dinteri S. Moore, the most similar species of the genus.

Research paper thumbnail of A new species of Polygonum L. (Polygonaceae) from South Africa

Botanical Journal of the Linnean Society, 2008

was identified as a new species. In addition to the description of the new species, Polygonum sni... more was identified as a new species. In addition to the description of the new species, Polygonum snijmanii, we discuss its relation with P. patulum M. Bieb., P. oxyspermum C. A. Meyer, Bunge & Ledeb., the most closely related species, and P. undulatum (L.) Berg., the most similar native southern African species.

Research paper thumbnail of Taxonomic notes on Polygonaceae from southern tropical Africa

Botanical Journal of the Linnean Society, 1999

Research paper thumbnail of Two new species of the genus Dicoma (Asteraceae) from Somalia

Botanical Journal of the Linnean Society, 1995

Two new species,Dicoma gillettiiandDicoma scoparia(Asteraceae), both from Somalia, are described ... more Two new species,Dicoma gillettiiandDicoma scoparia(Asteraceae), both from Somalia, are described and illustrated. The differences between the new species and related taxa are listed.

Research paper thumbnail of Ciudadanías Emergentes

El libro recopila experiencias de desarrollo local y democracia participativa en Ecuador

Research paper thumbnail of Lucio o la nostalgia

Íconos - Revista de Ciencias Sociales, 2013

Research paper thumbnail of Marcha por el agua, la vida y la dignidad de los pueblos

Letras Verdes. Revista Latinoamericana de Estudios Socioambientales, 2016

Este artículo da cuenta de la marcha que se realiza del 8 al 21 de marzo de 2012, a través de di... more Este artículo da cuenta de la marcha que se realiza del 8 al 21 de marzo de 2012, a través de diez provincias de Ecuador, organizada por actores indígenas, pobladores urbanos y gobiernos regionales que luchaban por el agua y contra la minería, en el marco del gobierno de la Revolución Ciudadana. Se indaga sobre si la marcha logra posicionar en el escenario político la crítica a la producción minera y si constituye un momento de inflexión del ciclo de reflujo que vivieron los movimientos sociales desde principios de siglo. La respuesta es negativa a la primera pregunta y respecto a la segunda plantea que no se da tanto una inflexión como una transformación en la naturaleza de los movimientos sociales. El artículo resume un estudio que examina fuentes documentales y material audiovisual, está sustentado en entrevistas a medio centenar de informantes calificados y en el análisis del discurso del presidente Correa; asume el enfoque del análisis de demandas y repertorios, inspirad...

Research paper thumbnail of Campesinado y nación. La construcción de México y Perú postcoloniales (Reseñas)

Íconos - Revista de Ciencias Sociales, 2013

Íconos, Revista de Ciencias Sociales es una publicación de Flacso-Ecuador. Fue fundada en 1997 co... more Íconos, Revista de Ciencias Sociales es una publicación de Flacso-Ecuador. Fue fundada en 1997 con el fin de estimular una reflexión crítica desde las ciencias sociales sobre temas de debate social, político, cultural y económico del país, la región andina y el mundo en general. La revista está dirigida a la comunidad científica y a quienes se interesen por conocer, ampliar y profundizar, desde perspectivas académicas, estos temas. Íconos se publica cuatrimestralmente en los meses de enero, mayo y septiembre. Para la selección de artículos se utiliza un arbitraje bajo el sistema de doble ciego ipeer review). Indexacián Íconos está incluida en los siguientes índices científicos: Sociological Abstracrs, Ulrich's, Hispanic American Periodical Index (HAPI), Thornpson Gale (Informe Académico), EBSCO-Fuente Académica, Latindex-Catálogo, REDALyC (Red de Revistas Científicas de América Latina y el Caribe) y CLASE (Citas Latinoamericanas en Ciencias Sociales). Iconos On Line Los contenidos de Íconos son accesibles on fine en texto completo a través de los portales de REDALyC (www.redalyc.org), CLACSO (www.clacso.org.ar/bibliotecalrevistas). Tecnociencia (Consejo Superior de Investigación Científica de España), DOAJ (www.doaj.org), FLACSO-Ecuador (www.flacso.org.ec/htmlliconos.html). Los artículos que se publican en la revista son de responsabilidad exclusiva de sus autores; no reflejan necesariamente el pensamiento de Íconos. Se autoriza la reproducción total o parcial de los contenidos siempre que se cite expresamente como fuente a Íconos,

Research paper thumbnail of Hyacinthoides italica" (L.) Rothm. en territorio español

Research paper thumbnail of Living on the edge: timing of Rand Flora disjunctions congruent with ongoing aridification in Africa

Frontiers in Genetics, 2015

The Rand Flora is a well-known floristic pattern in which unrelated plant lineages show similar d... more The Rand Flora is a well-known floristic pattern in which unrelated plant lineages show similar disjunct distributions in the continental margins of Africa and adjacent islands-Macaronesia-northwest Africa, Horn of Africa-Southern Arabia, Eastern Africa, and Southern Africa. These lineages are now separated by environmental barriers such as the arid regions of the Sahara and Kalahari Deserts or the tropical lowlands of Central Africa. Alternative explanations for the Rand Flora pattern range from vicariance and climate-driven extinction of a widespread pan-African flora to independent dispersal events and speciation in situ. To provide a temporal framework for this pattern, we used published data from nuclear and chloroplast DNA to estimate the age of disjunction of 17 lineages that span 12 families and nine orders of angiosperms. We further used these estimates to infer diversification rates for Rand Flora disjunct clades in relation to their higher-level encompassing lineages. Our results indicate that most disjunctions fall within the Miocene and Pliocene periods, coinciding with the onset of a major aridification trend, still ongoing, in Africa. Age of disjunctions seemed to be related to the climatic affinities of each Rand Flora lineage, with sub-humid taxa dated earlier (e.g., Sideroxylon) and those with more xeric affinities (e.g., Campylanthus) diverging later. We did not find support for significant decreases in diversification rates in most groups, with the exception of older subtropical lineages (e.g., Sideroxylon, Hypericum, or Canarina), but some lineages (e.g., Cicer, Campylanthus) showed a long temporal gap between stem and crown ages, suggestive of extinction. In all, the Rand Flora pattern seems to fit the definition of biogeographic pseudocongruence, with the pattern arising at different times in response to the increasing aridity of the African continent, with interspersed periods of humidity allowing range expansions.

Research paper thumbnail of A contribution to the knowledge of exine ultrastructure in subtribe Anisopappinae ( Athroismeae, Asteraceae )

Research paper thumbnail of An Unusual Fat-Containing Presacral Tumor in an Elderly Patient

Case Reports in Radiology, 2014

The authors present a case of a presacral myelolipoma diagnosed in an 84-year-old male patient wi... more The authors present a case of a presacral myelolipoma diagnosed in an 84-year-old male patient with longstanding pelvic pain and past medical history of bladder cancer. Pelvic computed tomography (CT) revealed a well-encapsulated and lobulated presacral mass, with mixed fat and soft-tissue attenuation. Magnetic resonance (MR) imaging provided further confirmation of macroscopic intralesional fat and excluded either adjacent bone invasion or bladder cancer recurrence. A presacral myelolipoma was suspected based on imaging findings, with liposarcoma and teratoma having also been considered for the differential diagnosis. The histological confirmation of the tumor was only attained postoperatively. This case report alerts to the possible presacral location of myelolipomas, which should be considered for every fat-containing lesion detected in this region. The main clinical, imaging, and differential diagnoses of this entity are reviewed in this paper.

Research paper thumbnail of Diseño y puesta en marcha de negocios asociativos en la cadena de la papa: Villa Pinzón, provincia de Almeidas, Cundinamarca

Las iniciativas para conformar grupos asociativos de productores de papa en la provincia de Almei... more Las iniciativas para conformar grupos asociativos de productores de papa en la provincia de Almeidas, se han desarrollado bajo la acción estatal. Esta actividad se encuentra muy limitada en la provincia, donde sólo existen tres asociaciones empresariales activas: Villapapa, la SAT Provilla y la SAT Villanorte. Pese a la resistencia al trabajo asociativo, se lograron determinar algunos negocios, en los cuales los pequeños productores que constituyen el mayor porcentaje en la región, estarían dispuestos a establecer coaliciones. Así mismo, se logró establecer que trabajando en forma asociada se obtienen mayores ganancias.

Research paper thumbnail of Scilla merinoi (Liliaceae), a new species from Galicia, northwestern Iberian Peninsula

Nordic Journal of Botany, 1993

Research paper thumbnail of Two new species of Dicoma (Asteraceae) from Somalia and Ethiopia

Nordic Journal of Botany, 1996

Oubiiia, J. R. 1996. Two new species of Dicoma (Asteraceae) from Somalia and Ethiopia. -Nord. J. ... more Oubiiia, J. R. 1996. Two new species of Dicoma (Asteraceae) from Somalia and Ethiopia. -Nord. J. Bot. 16: 277-281. Copenhagen. ISSN 0107-055X. Two new species of the genus Dicoma, D. popeana from Somalia and D. aethiopica from Ethiopia, both of the section Psilocoma, are described and illustrated. The two species are distinguished from D. anomala and other similar taxa by a morphologic diagnostic key.

Research paper thumbnail of The infraspecific taxa of Pleiotaxis huillensis (Mutisieae, Asteraceae)

Nordic Journal of Botany, 1999

Oubitia, J. 1999. The infraspecific taxa of Pleiotaxis huillensis (Mutisieae, Asteraceae). -Nord.... more Oubitia, J. 1999. The infraspecific taxa of Pleiotaxis huillensis (Mutisieae, Asteraceae). -Nord. J. Bot. 19: 23-26. Copenhagen. ISSN 0107-055X.

Research paper thumbnail of A new species of Dicoma (Asteraceae-Mutisieae) from Swaziland

Nordic Journal of Botany, 2000

A new species, Dicoma swazilandica, belonging to the tribe Mutisieae (Asteraceae) is described an... more A new species, Dicoma swazilandica, belonging to the tribe Mutisieae (Asteraceae) is described and illustrated. Differences between the new species and D. anomaia, the most similar species, are listed.

Research paper thumbnail of A new species of Anisopappus (Asteraceae, Inuleae) and its phylogenetic relationships within the genus

Nordic Journal of Botany, 2001

. A new species of Anisopappus (Asteraceae, Inuleae) and its phylogenetic relationships within th... more . A new species of Anisopappus (Asteraceae, Inuleae) and its phylogenetic relationships within the genus. -Nord. J. Bot. 21: 55-62. Copenhagen. ISSN 0107-055X. A new species of the genus Anisopappus (Asteraceae, Inuleae) from Angola, A . fruticosus, is described. The principal differences with respect to A . chinensis are discussed, and phylogenetic relationships with the other species of the genus are investigated by means of a cladistic analysis using morphological characters.

Research paper thumbnail of Effects of infliximab in the treatment of refractory posterior uveitis of Behçet’s disease after withdrawal of infusions

International Ophthalmology, 2010

To determine the efficacy of infliximab treatment in refractory posterior uveitis in Behçet&a... more To determine the efficacy of infliximab treatment in refractory posterior uveitis in Behçet's disease after withdrawal of infusions. Four patients with posterior uveitis secondary to Behçet's disease were treated with infliximab until complete remission and were followed after withdrawal of infusions. Intra-ocular inflammation was assessed using the binocular indirect ophthalmoscopy score, best-corrected visual acuity (BCVA) and foveal thickness measured by optic coherence tomography (OCT). All the patients included in the study were treated with infliximab for a minimum of 12 months and were in complete remission. None of the patients were taking steroids or immunosuppressants. Main follow-up after withdrawal of infusions was 7.5 months. Two out of four patients (50%) maintained complete remission of posterior uveitis. BCVA was stable in seven eyes. OCT showed worsening in macular edema in the two eyes of the patients with reactivation. Infliximab is an efficient long-term treatment for refractory posterior uveitis. Repeated infusions are required to maintain long-term remission which may be sustained on discontinuation of the drug.

Research paper thumbnail of Intravitreal bevacizumab as initial treatment for choroidal neovascularization associated with presumed ocular histoplasmosis syndrome

Graefe's Archive for Clinical and Experimental Ophthalmology, 2007

To report a case of juxtafoveal choroidal neovascularization in a patient with presumed ocular hi... more To report a case of juxtafoveal choroidal neovascularization in a patient with presumed ocular histoplasmosis syndrome (POHS) who was treated with intravitreal injection of bevacizumab (Avastin) as initial treatment. A 23-year-old woman with POHS presented with sudden dimness of vision and metamorphopsia in the right eye. The patient was examined with ophthalmoscopy, fluorescein angiography, and optical coherence tomography (OCT). Fundus examination, fluorescein angiography, and OCT of the right eye revealed a juxtafoveal choroidal neovascularization. Intravitreal injection of bevacizumab was performed with a postoperative improvement of visual acuity and resolution of the distortion. This case report describes a case of juxtafoveal choroidal neovascularization associated with POHS that responded remarkably well to intravitreal injection of bevacizumab.

Research paper thumbnail of A new species of Dicoma Cass. (Asteraceae: Mutisieae) from Namibia

Botanical Journal of the Linnean Society, 2002

During studies of the genus Dicoma (Asteraceae: Mutisieae), and specifically of the material coll... more During studies of the genus Dicoma (Asteraceae: Mutisieae), and specifically of the material collected by Dinter in Namibia, we have found a new species named Dicoma obconica. This species has previously been misinterpreted as D. picta (Thunb.) Druce. We present a description with illustrations, and discuss relationships with D. picta and with D. dinteri S. Moore, the most similar species of the genus.

Research paper thumbnail of A new species of Polygonum L. (Polygonaceae) from South Africa

Botanical Journal of the Linnean Society, 2008

was identified as a new species. In addition to the description of the new species, Polygonum sni... more was identified as a new species. In addition to the description of the new species, Polygonum snijmanii, we discuss its relation with P. patulum M. Bieb., P. oxyspermum C. A. Meyer, Bunge & Ledeb., the most closely related species, and P. undulatum (L.) Berg., the most similar native southern African species.

Research paper thumbnail of Taxonomic notes on Polygonaceae from southern tropical Africa

Botanical Journal of the Linnean Society, 1999

Research paper thumbnail of Two new species of the genus Dicoma (Asteraceae) from Somalia

Botanical Journal of the Linnean Society, 1995

Two new species,Dicoma gillettiiandDicoma scoparia(Asteraceae), both from Somalia, are described ... more Two new species,Dicoma gillettiiandDicoma scoparia(Asteraceae), both from Somalia, are described and illustrated. The differences between the new species and related taxa are listed.

Research paper thumbnail of Crepis novoana (Asteraceae), a new species restricted to coastal cliffs in northern Galicia (northwest Iberian Peninsula)

Botanical Journal of the Linnean Society, 1997

A new species of the section Lpidosmis (Rchb.) Benth. of the genus Crepk L. (Asteraceae) is descr... more A new species of the section Lpidosmis (Rchb.) Benth. of the genus Crepk L. (Asteraceae) is described. The new species is restricted to a single known locality on near-vertical coastal cliffs of the Ria de Cedeira in northern Galicia (northwest Iberian Peninsula). Morphometric characters permitting discrimination from the most similar taxa are detailed, and possible phylogenetic relationships with other species of the section LpidosetiS (particularly those of the C. vesicaria complex) are discussed.