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Se revisa Geranium sect. Gracilia (Geraniaceae), un grupo formado por nueve especies distribuidas por los Andes de Venezuela y Colombia. Se sinonimizan G. lindenianum y G. gracilipes a G. holosericeum. Se aclara la identidad de G. multiceps, y se establecen sus diferencias con G. santanderiense y con G. lainzii, ambas esencialmente colombianas. Se aceptan en esta secci6n G. lignosum, G. stoloniferum y G. sebosum, propuestos tras la descripci6n de la sect. Gracilia, y G. subnudicaule y G. velutinum, ya tratados por otros autores en como pertenecientes a este grupo. Por el contrario, la identidad de G. pilgerianum no ha podido ser aclarada tras la des- ~ucci6n del tipo y ante la falta de otros materiales de la especie. Se estudian diversos caracteres micromorfol6gicos, especialmente algunos referibles a la anatomfa foliar y la de la semilla. Se designan seis lect6tipos y un ne6tipo.
Geranium sect. Gracilia (Geraniaceae) comprises nine species in the Andes of Venezuela and Colombia. Geranium lindenianum and G. gracilipes are synonymized with G. holosericeum. The identity of G. multiceps is clarified. Its differences from the two Colombian species, G. santanderiense and G. lainzii, are discussed. Geranium lignosum, G. sebosum, G. stoloniferum, G. subnudicaule, and G. velutinum are now considered to be members of sect. Gracilia. The identity of G. pUgerianum could not be clarified because the type was destroyed and other collections have not been found. Micromorphological leaf and seed characters are discussed. Six lectotypes and one neotype are designated.
This work was partly financed by the Spanish Dirección General de Investigación Científica y Técnica (DGICYT) through the research project PB96-0849, and the Spanish Agency of International Cooperation (AECI) through the project 99GN0001.
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Gracilia, Geranium, Geraniaceae
Gracilia, Geranium, Geraniaceae
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