A Distribution and Taxonomic Reference Dataset of Geranium (Geraniaceae) in the New WorldAcronym: GERAMER
The dataset includes 8937 records that covers genus Geranium the New World, providing an updated, taxonomically consistent and a sound geographical distribution of the 137 species of Geranium in America. These are the studied specimens on which following monograph was based:
Aedo, Carlos (2012). Revision of Geranium (Geraniaceae) in the New World. Systematic Botany Monographs 95: 550p. Besides the exhaustive taxonomic work done, and reflected in the dataset, a detailed revision of the locality of the specimens was performed, and geographic coordinates could be assigned with a 1 minute accuracy in c. 6500 records. Duplicate specimens kept in different collections have been aggregated into single records. Specimens from 128 herbaria were reviewed. These were supplemented by others collected during nine field trips, which allowed to know better the variability of characters within populations, and refine species distribution ranges. These expeditions took place in Argentina, Bolivia, Chile, Costa Rica, Ecuador, Peru, United States and Venezuela, and yielded 235 herbarium specimens of Geranium belonging to 46 species. The potential for this dataset to be widely reused is very high, given the level of taxonomic and geographic scrutiny this dataset encompasses, its completeness, and the fact that Geranium is a well-known genus, widely used in horticulture and for pharmaceutical products.
The New World: South America,Central America and North America
This dataset gathers the primary data organized to support a modern and comprehensive monograph of Geranium in America
Studied specimens are listed in sufficient detail to allow revision and act checking. These data are made publicly available. Previous taxonomic sources studied and listed in the monograph. Database details (scientific names, dates, geographic coordinates and places checked for consistency using controlled vocabularies.
Further validation procedures (geographic coordinate format, coordinates within country/provincial boundaries, absence of ASCII anomalous characters in the dataset) were performed with DARWIN_TEST (v3.3) software (Ortega-Maqueda and Pando 2008), and additional checks were performed using the Vesper platform (Graham and Kenedy 2014).
Eighty-nine characters were scored for the species description: 58 qualitative and 27 quantitative traits as well as four ratios. Ideally at least 15 specimens were scored for each species. Quantitative characters were assessed with a Digital caliper Mitutoyo CD-15CD. The most frequent values are percentiles, and the extreme values are enclosed in parentheses. In the line drawings of leaf laminas and petals the adaxial side is shown, unless stated otherwise.
For scanning electron microscopy (SEM) of pollen, mericarps, and seeds, samples were glued to aluminum stubs, coated with 40—50 nm gold, and examined with a JEOL TSM T330A scanning electron microscope at 15 kV.
A database containing nomenclature, taxonomic and specimen-level data was built following the guidelines described in:
Pando, F.. 1999: Manual de las bases de datos de Flora Mycologica Iberica. – Cuad. Fl. Micol. Ibérica 2: 3-67
Pando, F., Muñoz Garmendia, J. F. & Aedo, C. 1999: Manual de las bases de datos nomenclaturales de Flora Mycologica Iberica y Flora Iberica. – Cuad. Fl. Micol. Ibérica 14: 3-58.
Type of content
Includes: point occurrence data.
Aedo C, Pando F (2015): A Distribution and Taxonomic Reference Dataset of Geranium (Geraniaceae) in the New World. v2.11. CSIC-Real Jardín Botánico. Dataset/Occurrence. https://doi.org/10.15470/ibqzdo
This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.
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Metadata last updated on 2019-12-11 12:47:49.0