The present paper is the first list of vascular flora from the Puerto Viejo wetland, Cañete, Lima. A total of 32 species of vascular plants, grouped in 28 genera and 15 families were registered between March 2003 and July 2009. The Magnoliopsidae (Dicotyledoneae) was the dominant group with 20 taxa. The 34% of the taxa (11 species) are considered as introduced species.

This is a second part of biodiversity study of Poaceae family from Yanachaga-Chemillen National Park and surroundings places (Oxapampa, Pasco, Peru). This part is dedicated to diversity of follow subfamilies: Pooideae, Centohecoideae, Arundinoideae, Chloridoideae and Panicoideae. A total of 12 tribes, 37 genera and 63 species have been registered. Descriptions of genera and keys for genera and species are developed. Ecology, distribution and studied material are indicated.

This work is the first part of biodiversity study of Poaceae family from Yanachaga-Chemillen National Park and surroundings places (10º35´ − 10º10´ S and 75º10´ − 75º45´ W and from 300 to 3800 m). We analysed the material colected for us since 1995 to 1996 and material deposited in the Herbario San Marcos of Museo de Historia Natural and Missouri Botanical Garden. This first part is dedicated to the Bambusoideae biodiversity. A total of seven genera and 23 species have been registered. In the woody bamboos group, genus Chusquea was the mayor species number (seven). The genus Olyra is the most diverse of the herbaceous bamboos with five species. Descriptions of subfamily, genera and keys for genera and species are developed. Ecology, distribution and studied material are indicated.

El presente trabajo corresponde al primer reporte de flora vascular para el Humedal de Puerto Viejo, Cañete, Lima. Para esta localidad fueron registrados entre marzo del 2003 y julio del 2009, un total de 32 especies de plantas vasculares, agrupadas en 28 géneros y 15 familias. Las Magnoliópsida fueron el grupo dominante con 20 de los taxones. Del total de especies registradas el 34% (11 taxones) corresponden a especies consideradas introducidas.

This is a second part of biodiversity study of Poaceae family from Yanachaga-Chemillen National Park and surroundings places (Oxapampa, Pasco, Peru). This part is dedicated to diversity of follow subfamilies: Pooideae, Centohecoideae, Arundinoideae, Chloridoideae and Panicoideae. A total of 12 tribes, 37 genera and 63 species have been registered. Descriptions of genera and keys for genera and species are developed. Ecology, distribution and studied material are indicated.

El presente trabajo es la primera parte de un estudio de la biodiversidad de la familia Poaceae del Parque Nacional Yanachaga-Chemillén y zonas aledañas, (10º 35' − 10º 10' LS y 75º 10' − 75º 45' LO, y desde los 300 hasta los 3800 m). El material utilizado procedió de colectas realizadas por los autores desde 1995 a 1996 y de material depositado en el Herbario San Marcos (USM) del Museo de Historia Natural y del Missouri Botanical Garden (MO). En esta primera parte se da a conocer la diversidad de la subfamilia Bambusoideae. En el área de estudio han sido registradas para la subfamilia Bambusoideae 7 géneros y 23 especies. Entre las Bambusoideas leñosas el género Chusquea presentó el mayor número de especies (siete). El género Olyra es el mejor representado entre las Bambusoideas herbáceas con cinco especies. Se presenta una breve descripción de la subfamilia y los g�...

Se evaluó el efecto promotor de tres géneros de bacterias PGPR (bacterias promotoras de crecimiento de plantas), Actinomicetos, Bacillusy Pseudomonas sobre el crecimiento del cultivo de Solanum tuberosum “papa” en sustratos con diferentes proporciones de arena, musgo y tierra de cultivo. Se realizó un ensayo a nivel de invernadero, con seis repeticiones por cada tratamiento y un tratamiento control. El ensayo tuvo una duración de tres meses. Se evaluó el crecimiento poblacional y los parámetros de crecimiento de la planta. Se hizo un análisis de varianza (ANOVA) y comparación de medias con la prueba de Tukey (p

We report for the first time the presence of Aristida asplundii Henrard (Poaceae, Aristidoideae) for Peru based on collections from the region of Puno (southern Peru). We include a key to recognize all species of Aristida that grow in Perú.

Reportamos por primera vez la presencia de Aristida asplundii Henrard (Poaceae, Aristidoideae) para Perú basada en colectas de la región Puno (sur del Perú). Incluimos una clave que permite diferenciar las especies de Aristida que habitan en Perú.

We report for the low and half elevations of the Arahuay district (Canta, Lima, Perú), a total of 49 species of the family Poaceae, grouped in 28 genera, 14 tribes and four subfamilies. Poa is the most diverse genus with five species, followed by Eragrostis and Nassella with four species each one. The species Calamagrostis spiciformis, Chloris halophila, Lamprothyrsus peruvianus, Festuca glyceriantha, Lolium multiflorum and Poa supina are new reports for the department of Lima. We provide dichotomic keys for genera and species determination. Additional information about habitat, distribution and the studied material is provided for each species.

Se reportan para el distrito de Arahuay (Canta, Lima, Perú) (zona baja y media) un total de 49 especies de la familia Poaceae agrupadas en 28 géneros, 14 tribus y 4 subfamilias. El género Poa es el más diverso con cinco especies, seguido por Eragrostis y Nassella con cuatro especies cada una. Las especies Calamagrostis spiciformis Hack. ex Stuck., Chloris halophila Parodi, Lamprothyrsus peruvianus Hitchc., Festuca glyceriantha Pilg., Lolium multiflorum Lam. y Poa supina Schrad. son nuevos reportes para el departamento de Lima. Se presentan claves dicotómicas para la determinación de los géneros y para las especies en los casos pertinentes. Para cada especie se incluye datos sobre su hábitat, distribución y el material estudiado.

Since 2006 to 2008, floristic and vegetational studies on cryoturbed soils and its associated habitats were carried out in four sites above 4500 m, at Cordillera Blanca (Ancash, Peru). Botanical collections and intersection-line transects were made. The space (in cm) occupied by each species were measurement. A total of 136 species, in 65 genera and 26 families, were recorded. Magnoliopsida (Dicots) were the most diverse (97 spp.), followed by the Liliopsida (Monocots) (36 spp.). The highest species richness was found in the Asteraceae and Poaceae families (40,63%). The most diverse genera was Senecio (18) and Calamagrostis (12 ). We registered 76 species (54,82%) in cryoturbed soils and associates habitats, while 60 species (44,11%) were recorded for the adjacent vegetation. From the total, 95,56% of the species were perennials herbs. Four types of plants comunities were characterized: ...

Entre los años 2006 y 2008, se llevaron a cabo estudios florístico y de vegetación de los suelos crioturbados y hábitats asociados en cuatro localidades de la Cordillera Blanca (Ancash, Perú) localizadas por encima de los 4500 m. Se realizaron recolectas botánicas además de transectos de intersección-línea, en los cuales se midió el espacio (en cm) ocupado por cada especie. Fueron determinadas 136 especies de plantas vasculares, agrupadas en 65 géneros y 26 familias. Las Magnoliópsida (dicotiledóneas) fueron las más diversas con 97 especies, seguidas de las Liliópsidas (Monocotiledóneas) con 36. La mayor diversidad está concentrada en las familias Asteraceae y Poaceae (40,63%). Los géneros con mayor riqueza de especies fueron Senecio (18) y Calamagrostis (12). Se registraron 76 especies (54,82%) en suelos crioturbados y hábitats asociados; mientras que 60 especies (44,...

around Abra Apacheta, in Cangallo (Ayacucho) and Huaytara (Huancavelica) Provinces. The aims of this study were: to study vascular floristic composition of High Andes (over 4500 m of altitude) and characterize highland vegetation. There were used conventional techniques for botanical collection and vegetation coverage measurements by intersection-line transects and Point Quadrat modifyed method. There were registered 134 species of vascular plants (Pteridophytes, Gymnospems, Eudicots and Monocots) grouped in 60 genera and 23 families. Eudicots were the dominant group with 74% of the total registered, 82% in genera and 77% in species; followed by Monocots with 13%, 13% and 21% in the previous categories. Monilophytes (ferns) were poorly represented by two families (9%), two genera (3%) and two species (1%); while Gymnosperms only registered one specie (Ephedra rupestris Benth.). By the qu...

around Abra Apacheta, in Cangallo (Ayacucho) and Huaytara (Huancavelica) Provinces. The aims of this study were: to study vascular floristic composition of High Andes (over 4500 m of altitude) and characterize highland vegetation. There were used conventional techniques for botanical collection and vegetation coverage measurements by intersection-line transects and Point Quadrat modifyed method. There were registered 134 species of vascular plants (Pteridophytes, Gymnospems, Eudicots and Monocots) grouped in 60 genera and 23 families. Eudicots were the dominant group with 74% of the total registered, 82% in genera and 77% in species; followed by Monocots with 13%, 13% and 21% in the previous categories. Monilophytes (ferns) were poorly represented by two families (9%), two genera (3%) and two species (1%); while Gymnosperms only registered one specie (Ephedra rupestris Benth.). By the qu...