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: ...

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...

The Caryophyllaceae are represented in Peru by 19 genera and 126 species (Brako & Zarucchi, 1993), mainly herbs and subshrubs. Here we recognize 44 endemic taxa in 11 genera. We applied IUCN categories and criteria to 43 taxa. Endemic taxa are found mainly in the High- Andean and Mesoandean regions, between 2500 and 4950 m elevation. Ten endemic species have been registered within Peru´s protected areas system.

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...

La familia Caryophyllaceae es reconocida en el Perú por presentar 19 géneros y 126 especies (Brako & Zarucchi, 1993), principalmente hierbas y subarbustos. En este trabajo reconocemos 44 endemismos en 11 géneros. Estos taxones endémicos se encuentran principalmente en las regiones Altoandina y Mesoandina, entre los 2500 y 4950 m de altitud. Se aplicaron las categorías y criterios de la UICN a 43 taxones. Diez taxones endémicos se encuentran representados dentro del Sistema Nacional de Áreas Naturales Protegidas por el Estado.

A total of 146 species of vascular plants, grouped in 124 genera and 52 families were recorded, among August 1997 and December 1998. The Magnolliopsidae (Dicotyledoneae) was the, dominant group with 115 species, 26 genera, and 8 families. There are not records for Gymnosperm. Three species represented the Pteridophyta. The more representative families were, the Asteraceae with 19 species, Poaceae with 16 species and Solanaceae with 13 species.

Se ha registrado un total de 146 especies de plantas vasculares, agrupadas en 124 géneros y 52 familias, entre agosto de 1997 y diciembre de 1998. Las magnoliópsidas (dicotiledóneas) fueron el grupo dominante con 115 especies, 96 géneros y42 familias. Las liliópsidas (monocotiledóneas) estuvieron representadas por 28 especies, 26 géneros y 8 familias. No se registró gimnospermas. Los pteridófitos estuvieron representados por tres especies. Las familias más representativas fueron Asteraceae con 19 especies, Poaceae con 16 y Solanaceae con 13.

This work shows the results of the vascular flora inventory of Pantanos de Villa carried out in 2007, also, the floristic changes of the last years are analyzed. 47 wild species have been registered, included in 43 genus and 27 families. The higher species number were found in Poaceae (7), Cyperaceae (4) and Asteraceae (4). We reported 7 wilds species as new records for the wetland: Alternanthera pubiflora, Alternanthera halimifolia, Limnobium laevigatum, Colocasia esculenta, Rumex obtusifolius, Elodea potamogeton, Plantago major. Also we found 11 cultivated species in the wetland. The results show a decrease in species richness compared with previous studies, mainly of aquatic species. Similarity analysis with previous studies indicates a change in the composition of the flora in time.

This study provides information on the diversity of Peruvian species of Polylepis. Nineteen (19) species are reported here (more than 70% of the 27 species registered for the whole Andean region). As a result, Peru could be considered as the country with the largest diversity of Polylepis species, in comparison with Bolivia (13), Ecuador (7), Argentina (4), Colombia (3), Chile (2), and Venezuela (1). The species occur in 19 departments of Peru, with the majority of them in Cusco (10) and Ayacucho (8). Species diversity is mostly concentrated in the Peruvian southern Andes (15 species), with the region becoming the potential center of diversification of the genus Polylepis. Regarding their altitudinal distribution, the greatest diversity (18) is found between 3000 and 4000 m.

The presence of 40 species of plants of the Brassicaceae family grouped in 17 genera and 5 tribes is confirmed within the area of study . From the total of the species, three are considered endemic of Ancash and two are nationally endemics. Dichotomous keys for the genera and species are presented as well as distribution information for each of the species.

In this paper we report the lichens of Pueblo Libre, an Andean locality, (09º05’30’’ - 09º10’15’’ S and 77º47’30’’ - 77º52’50’’ W) in Huaylas, Ancash, Peru. Surveys were made at 2200 to 4450 m of elevation. In all 38 species, 29 genera and 17 families, besides one imperfect taxon are are reported. A key of family, genera and species is included. Morphological and anatomical features are described for each species, including its chemical reaction, habitat and vouchers.

A study of the vascular flora composition in the river Ilo-Moquegua basin and Lomas of Ilo is presented herein, at elevations that vary between sea level and 4600 meters, based on intensive collections, examination of herbarium specimens and bibliographic research. According to the present study, the vascular flora in the river Ilo-Moquegua basin and Lomas of Ilo was found to consist of 63 families, 233 genera and 394 species. Eighty three percent of the species are Magnoliopsida and 15% belong to the Liliopsida. Families with the largest number of genera and species are Asteraceae (41 genera and 60 species), Poaceae (28 and 44), Solanaceae (11 and 32), Fabaceae (17 and 26), Malvaceae (11 and 21), Brassicaceae (10 and 15), Boraginaceae (9 and 15) and Cactaceae (10 and 14). The dominant biological forms are herbs (69%), followed by shrubs (28%), climbing plants (4%), trees (2%) and parasi...

A total of 25 species were found in the study area grouped in 12 genera and 5 tribes. Eight species are considered additions to the flora for the department of Ancash. None of the species reported as endemic for Ancash were found. Dichotomous keys are presented for the genera and some species. A brief description and information on the ecology and distribution of each species is included as well as the exicatta.

The vascular flora and vegetation were studied in the valley of Ica, located in the central coast of Peru. A total of 142 species were registered, from 121 genera and 39 families. Magnoliopsid (dicotyledons) represented 79% of the species, liliopsids (monocotyleclons) 20%, and Ptericlophyta only 1%. Herbs were the prevalent growth form (80% of the species), while riverine environments and agricultural fields were the preferred habitats for most of the species. This study expands the known distributions of 46 species, three of which are endemic to Peru.

Polylepis (Rosaceae) forests are part of the natural vegetation of the Andes between 3500 and 5000 m altitude, usually restricted to rocky slopes and ravines and becoming important ecosystems. During 2008-2010 were made specimens collections in the Yauyinazo and Chaqsii-Chaqsii Polylepis forest into Reserva Paisajística Nor Yauyos-Cochas in two seasons (wet and dry). We present, the vascular flora and seasonal variation the Yauyinazo and Chaqsii-Chaqsii forests. Was registered 282 species in two forests, belonging 170 genera and 62 families, the Asteraceae and Poaceae families were the most diverse. Herbaceous and shrub plants were the most diverse with 71.6% and 17.4% respectively. In Yauyinazo forest were registered 232 species belonging 153 genera and 58 families and in the Chaqsii-Chaqsii forest 213 species belonging 137 genera and 56 families. We report 41 species endemic and ...

Se presentan los resultados del estudio de la flora vascular de los Pantanos de Villa realizadas en el 2007 y se analiza los cambios florísticos en los últimos años. Se registraron 47 especies silvestres comprendidas en 43 géneros y 27 familias. Las familias con mayor numero de especies fueron Poaceae (7), Cyperaceae (4) y Asteraceae (4). Se reportan 7 especies silvestres como nuevos registros para el humedal: Alternanthera pubiflora, Alternanthera halimifolia, Limnobium laevigatum, Colocasia esculenta, Rumex obtusifolius, Elodea potamogeton, Plantago major. Se encontraron 11 especies cultivadas en el ecosistema. En comparación con estudios anteriores, los resultados muestran una disminución en la riqueza florística, principalmente de las especies acuáticas. El análisis de similitud con anteriores estudios indica un cambio en la composición de la flora en el tiempo.

This study provides information on the diversity of Peruvian species of Polylepis. Nineteen (19) species are reported here (more than 70% of the 27 species registered for the whole Andean region). As a result, Peru could be considered as the country with the largest diversity of Polylepis species, in comparison with Bolivia (13), Ecuador (7), Argentina (4), Colombia (3), Chile (2), and Venezuela (1). The species occur in 19 departments of Peru, with the majority of them in Cusco (10) and Ayacucho (8). Species diversity is mostly concentrated in the Peruvian southern Andes (15 species), with the region becoming the potential center of diversification of the genus Polylepis. Regarding their altitudinal distribution, the greatest diversity (18) is found between 3000 and 4000 m.

The presence of 40 species of plants of the Brassicaceae family grouped in 17 genera and 5 tribes is confirmed within the area of study . From the total of the species, three are considered endemic of Ancash and two are nationally endemics. Dichotomous keys for the genera and species are presented as well as distribution information for each of the species.

In this paper we report the lichens of Pueblo Libre, an Andean locality, (09º05’30’’ - 09º10’15’’ S and 77º47’30’’ - 77º52’50’’ W) in Huaylas, Ancash, Peru. Surveys were made at 2200 to 4450 m of elevation. In all 38 species, 29 genera and 17 families, besides one imperfect taxon are are reported. A key of family, genera and species is included. Morphological and anatomical features are described for each species, including its chemical reaction, habitat and vouchers.